858 pll mods. if i take out the mod frequency switches fine.

7. Ebay Active Member. Your best bet is to use an MB8719 AM/SSB chassis for swing mods. 858 310 173 63 North Carolina www. Oct 4, 2015 · Better rather late than never - the "no SMT" expansion that will fit nearly all SSB capable radios that use a dowmixer type PLL circuit. Aug 3, 2011 · I thought I did then I found out the model (Palomar 500 SSB)I had bought was late model and was not an 858 PLL. Unsolder banded end of D21 and D22. I use to have a Teaberry Stalker II, but a local wanted it bad, so I let it go to him. 1; 2; 3; First Prev 3 of 3 Go to page. This mod uses an EPROM to contol the PLL, so access to an EPROM programmer is needed, plus it is recommended that only experienced techs attempt it. Aug 1, 2008 · I am looking for replacement relays for the 858 PLL chassis like the President Washington. one outer leg is soldered to ground and Nov 29, 2006 · There are several 858 PLL mods to expand channels, but one specific shows having to add a circuit to get one band on the 29XLR Anyone know why? Can you do the 2 switch mod on the AM version radio? What is the recomended pll mod to get the best expansion out of the 29 XLR 858 pll? Thanks in advance! This counter shows the number of hits since the 5th April 1999 Jun 22, 2022 · Hey everyone I'm trying to modify a new radio. Both have been gone thru and work (whatever that means). The modifications allow accessing up to 3 sets of additional channels through the positioning Basically, you need to either add voltage or ground pin #16 on the MB8719 PLL. yes the 02A and 858 PLL chips made mods easy – there was evn the UFO digiscanners which in one Apr 1, 2013 · President/Uniden Washington clarifier mod (MB8719 PLL) Clip or remove R187 Clip or remove D36 Unsolder the red wire going to the clarifier control off the main board, and resolder that wire to the main PCB ground. 685-26. 700. com 715 Aug 7, 2011 · This also will also act as a limiter of sorts, and will result in a cleaner sounding radio. Replacement VCO units for Cybernet CB radios , ranging from standard VCO ( green block ) replacement t o VCO's with build in voltage feed and for the PTBM059 board a FM audio improvement built in. EPROM frequency expansion add on boards for amateur CB mods, cb radio schematics service manuals and projects, mike wiring diagram, bleeps, PLL pinouts, component data sheets, transistor and integrated circuit info, communications cbradio radiomods modification modify CB radio expand modifications expansion add ons bleep frequency ham HAM amateur radio projects repair fix broken dead no power Dec 2, 2016 · The mods shown in the link above are for later radios that had the 858 chip mounted on the main pc board. It will give 1 band down, 1 band up, UK 40 (up 64 channels without Alpha ch hops), NZ 40 (down 63 channels) and Apr 3, 2005 · Same PLL chip in both the TRC457 and the original President Zachary T. PLL Frequency Mod Diagrams Apr 15, 2012 · It's how the varactor works - the 858 chassis - at least to "center" the onboard stock varactor - needs a padding resistor - so the linear region of the varactor makes the slide even up or down - but padding comes at the price of slide width - making more slide requires the mod be done, but to use a less drastic mod, would be to pad the clarifiers LOWER (to ground side) to keep linearity - but Jul 7, 2003 · I done the mod as you specified. Radio must be in original condition, i. Some of the fake 1307s out there are really hard to tell from the real thing. UNSOLDER and remove D30. I have heard old 858 chassis in stock trim and in various states of modification and to be honest each of them sounded great different but great. THE UNIDEN 858SSB CHASSIS. 785 Ch4=27. Joined Jan 11, 2014 Messages 70 We host 606,210 mods for 3,068 games from 140,001 authors serving 53,395,665 members with 12,341,836,794 downloads to date. 9,297 9,486 593 Nor Cal Sierra Nevada. Also, you have to consider that some knucklehead tried to add extra channels to it, and goofed up the programming pins and the VCO tuning. Mar 13, 2024 #5 is it the 858 PLL or the later model with the uPD2816 ? 10 Khz jump mod for the uPD858 PLL. Feb 15, 2016 · Honestly, the D858 AM/SSB chassis is not a good board to mod for a "swing" mod, because it uses a form of speech processing. I agree with Loose Cannon that this thread should be made a "Sticky". Install a 4. Hopes this is of some help. For 7A go to CH 7 and flick the toggle switch up. this kit is for upgrading the factory final output transistor, or, to replace a burned final, in the 858 pll units only. Thank you, Yankee Yankee Mar 9, 2006 · here is a chart to mod the PLL's on most radios. Post by Uncle Ray » Tuesday 28th Oct 2008, 2:26. 815 Ch6-Ch9 would not lock in,all other channel's were normal. 7k or 10k pull down resistors to ground. The Uniden 858 ssb chassis was produced between1976 and 1978, and was sold under many brand names. ) but this is normal as it was factory fitted. 9. 120Mhz crystal, so I could get 5kc steps out of the PLL do you think this would work for me to then be able to get on the zero's aswell as the normal channels? cheers again,Shaun Sep 10, 2013 · 858 PLL Mods and stuff | WorldwideDX Radio Forum . FA: Vocom 75W 858 Mhz Repeater Power Amp *NEW* 7. If it is a 2 button version of the Washington look for channel mods using a 858 PLL. This chassis was (and still is) the. Mar 30, 2020 · Found both online for sale. I have radios that covers both generations of this board. It is probably best to simply align the whole PLL while you are at it. I told him that I wanted to get one of these fine, old radios some day. In had already first circuits ts 9 discrete re electronic oday's PLL rel selection ge-Scale-In-see, this fact iability and bugs make ause of the mpeting for uencies was asically the 3enerations I its rules to revent this. 415 TO 27. EPROM frequency expansion add on boards for amateur CB mods, cb radio schematics service manuals and projects, mike wiring diagram, bleeps, PLL pinouts, component data sheets, transistor and integrated circuit info, communications cbradio radiomods modification modify CB radio expand modifications expansion add ons bleep frequency ham HAM amateur radio projects repair fix broken dead no power Uniden Cobra Superstar Jackson channel expansion boards for the MC145106 PLL and the MB8719 PLL. for the plus or minus 10 KHz. egalized CB started off rgh various J. PCB is marked as PC-152AC. i have heard there is a mod out there, just cant find it :? Posts: 538 nice job looks great. This radio, with the metal-box PLL uses different binary arithmetic. Find the PLL and then find the mod :) CCI3001. 7k resistor across this cut, from pin 19 back to ground. It describes isolating pins on the PLL chip and adding resistors and switches to allow selecting between the standard 40 channels or additional channels that are higher or lower in frequency. Aug 7, 2011 · I had an 858 chassis that wouldn't peak up and all of the components looked good. mods for the upd2824/ upd2816 pll such as the : cobra 146gtl, trc-451, 453, 465 , Oct 8, 2011 · I have recently followed all the walk-thrus to open up my TRC-458, however I am confused by this one 27. Dec 31, 2005 · hello i am looking for the band expand mod / 5kc slider alinement guide as long as are confirmed to work for a RADIO = courier spartin pll CHIP = d858 or even info where i can take my radio in melboure to get it done saince i only just got back into radio thank you for any help and thank you for your time adam Feb 12, 2006 · I was under the understanding that the 2000s, 148s and Grants used the Expo L kit. Here are the steps you could follow to complete this mod: Locate the R44 and D52 on the circuit board. EPROM frequency expansion add on boards for amateur CB mods, cb radio schematics service manuals and projects, mike wiring diagram, bleeps, PLL pinouts, component data sheets, transistor and integrated circuit info, communications cbradio radiomods modification modify CB radio expand modifications expansion add ons bleep frequency ham HAM amateur radio projects repair fix broken dead no power Sep 28, 2012 · Cornpatch of Iowa. EPROM frequency expansion add on boards for amateur CB mods, cb radio schematics service manuals and projects, mike wiring diagram, bleeps, PLL pinouts, component data sheets, transistor and integrated circuit info, communications cbradio radiomods modification modify CB radio expand modifications expansion add ons bleep frequency ham HAM amateur radio projects repair fix broken dead no power 8719-192-L-PLCC Uniden 858 KIT INSTRUCTIONS The installation of the 858 kit requires soldering. 735 MHz. Another thing to overcome is the need to broadband the xmit circuit. Posted on the CB Tricks site being incorrect, although the first one works great, along with the pin 13 mod. with FAQ and help EPROM frequency expansion add on boards for amateur CB mods, cb radio schematics and projects, mike wiring diagram, bleeps, PLL pinouts, component data sheets, transistor and integrated circuit info, communications cbradio radiomods modification modify CB radio expand modifications expansion add ons bleep frequency ham HAM amateur radio projects Amateur mods Mods mod CB circuit diagrams block Aug 21, 2005 · Does TX with Mod on SSB & AM. Locate pin 19 of the 858 PLL. UNSOLDER and remove D29. 2. 445 Realistic TRC-458 26. The 1st Gen with only 2 push buttons, this tells you its a D858 PLL and not the later MB8718 design w Jun 17, 2009 · It has the 858 PLL. First one done is the old uPD858 chassis from the late 1970's. Along with several other sideband radios that had the great 200 channel uPD-858 PLL, done with just a pin switching mod. Thanks for the help, guys. if i take out the mod frequency switches fine. I read they have 858 PLL usually. up and down switching. 5Kc Steps for UNIDEN 858SSB Chassis With more operators using export or amateur transceivers for 11 meter dxing, the use of frequencies 5 kc below the standard cb channels (i. 73 Gtrkid68 defpom Defpom CB cb schematics communications cbradio mods radiomods modification modifications expansion add ons bleep frequency ham HAM amateur radio projects Amateur mods Mods mod CB radio circuit diagrams block diagrams component data sheets intergrated circuits pinouts RF signal FET transistors cct uniden Uniden cobra Cobra president President realistic Realsitic superstar Superstar Many of the older PLL chips, like the PLL02A and UPD858c, were used in applications other than cb radios. May 5, 2011 · These are mods that guys like me (and LC) who still run an 858ssb chassis (mine's a TRC-457) have been waiting for. Unsolder the orange wire going to the clarifier control off the main board, and solder it to the + side of C66. Add a jumper in the holes from where you removed D29. The three crystals in the PLL that each have a trimmer cap are not organized like all your later radios, where one trimmer cap is for each mode. upD 861 pll channel conversion needed. D. I replaced the 10. He gave me one of the radios plus he is giving me a fourth parts radio to keep. Apparently this mod would only provide upper channel's. 7K resistor Apr 7, 2023 · The advantage of this mod is that it allows you to fine tune the received signal more precisely. more than likely the mod for those freq was not done if it is a 858PLL. Be sure to totally isolate pin 19 from ground. this pin will be connected to ground with a small trace. 045 to 28. Thread starter 2RT307; Start date Sep 28, 2012; Prev. it also has the regular fcc band. 3258 crystal and switching pin 10 will cause it to go UP. Gotta use the right setup to match the particular 858 radio you want to mod. (2) NEW DOORKNOB CAPS-1000 pF, 5kV, CRL 858 FA. Many FS22 mods on PS4, PS5, Xbox and PC everyday! Add a jumper in the holes from where you removed D29. 858 pll freq mod . BTW, you said the mod meter didn't work. , such as the older UPd-858 PLL sideband rigs, without changing or adding crystals and they are every bit as good as the newer sideband rigs, just ask some of the people who have the UPd-858 PLL sideband rigs. 805 Ch5=27. the 148 uses the 11. 4. Dawn Member. Cut the end of R119 that is closest to D29. Here's how to do a 10 Kc UP jump only: 1. 5. 50 each. The other heatsinks, in the radio, stay at or about room temperature. It turned out that a small piece had broken off one of the cores, and was stuck inside the can. Other than that I would check the mike amps (TR28/29) input and output for proper levels. Locate pin 21 of the 858 PLL. EPROM frequency expansion add on boards for amateur CB mods, cb radio schematics service manuals and projects, mike wiring diagram, bleeps, PLL pinouts, component data sheets, transistor and integrated circuit info, communications cbradio radiomods modification modify CB radio expand modifications expansion add ons bleep frequency ham HAM amateur radio projects repair fix broken dead no power Amateur, Ham and CB radio modifications, with schematics,circuit and block diagrams, mods,alignments and reference info, PLL pinouts, component data sheets,CB radio pll-radio charts,VR lists,projects,bleeps, mikes, tweaks, radios. Of course the radio would have to be retuned, but I once had a Realistic TRC-458 with that chassis, and once the transmit wideband mods were done, it would cover the novice/tech portion of 10 meters If pin 10 of the PLL is tied low, remove the ground and pull the pin high to go down 64 channels ! (as found in the Washington) If the pin is tied high, remove the voltage and ground the pin to go up 64 channels ! The state of pin 10 depends on the country that you are in and how it has been modified for the frequencies that are used. 27. Aug 1, 2008 · I would suspect that the VCO may need a slight touch up. if it is the 858 PLL here is all the mods that are available for it on radionuts sight. FA: Vocom 75W 858 Mhz Repeater Power Amp *NEW* 5. /e Cobra 146, President AR144) Apr 6, 2005 · it has the 858 pll & has high band fitted ,channels are a bit jumbled up on high band (ch16 is 27. 415-27. It has an 858 PLL which I was really looking forward to modding until I ran into a few issues. Has the big, fat "uPD-858" Pll chip, which is not "locked", and can be modded for added frequency coverage. drive is a vehicle simulation video game, released in 2015 for Windows platform by German game developer BeamNG. Doesn't do this for sideband. Uniden listed as having additional mods though none are listed of see-able in the pics. many years ago, and actually hearing notes being played as the channel selector was rotated, each click of the switch sent the frequency of the tone higher. This mod works best if you're planning on using an amplified desk microphone, like a D104, or a Turner +3/+3B/Super Sidekick. EPROM frequency expansion add on boards for amateur CB mods, cb radio schematics service manuals and projects, mike wiring diagram, bleeps, PLL pinouts, component data sheets, transistor and integrated circuit info, communications cbradio radiomods modification modify CB radio expand modifications expansion add ons bleep frequency ham HAM amateur radio projects repair fix broken dead no power mods for the 858 pll such as the cobra 138 ,139 xlr (old style) president adams, grant, washington, madison, trc-449, 449, 458 rodyn sb510d/520d, midland 79-893, palomar ssb500. I have a 3 button version with the 8719 PLL and when I got it, a previous owner had put extra channels on the NB button, and had added a push/pull switch to the mic gain knob for the other switch to add channels to my version. Using a small x-acto knife, make a small cut between pin 19 and ground. Want to think Courier and Pierce Simpson also made some mobile sideband radios with the 858 PLL. (This link will open in another window) This is some handy software that I wrote to assist with modificationsby telling you what is possible and what frequencies will be generated for a given PLL type and radio chassis, it can also help teach people more about the theoretical operation of different CB types. Looking forward to the driver mod. Top. Standard they tune up well with a little bit of swing on AM, i just find that the 858's and in paticular the ax144's too limited. 045 if you need the mods let me know. I agree with Unit 399 though, The 2nd gen 858 board is the better of the two, but both gens Nov 4, 2001 · 715, Do you have the one with the 8719 PLL or the 858 PLL? Steve Tech181 Tech181@copperelectronics. Add a jumper wire from R119 (the cut end) to the banded end of D44. on the internet. 73 Gtrkid68 The CB's are listed by PLL model. Yes, both types can be modded for extra frequency coverage, but the instructions for modding a SSB radio will NOT work as advertised for a AM-only model, and vice versa. 855. We will Feb 21, 2024 · I know there are many mods/ways you can modify the 858 PLL, but which way would you all recommend? Note: Owner wants just the regular 40 channels and the high frequencies to get him to 27. Cut trace to pin #16 on the PLL. 1)find pin #19 of the 858 chip. The second mod is optional. 7k 1/4W resistor from pin 19 to a spot on the ground foil. EPROM frequency expansion add on boards for amateur CB mods, cb radio schematics service manuals and projects, mike wiring diagram, bleeps, PLL pinouts, component data sheets, transistor and integrated circuit info, communications cbradio radiomods modification modify CB radio expand modifications expansion add ons bleep frequency ham HAM amateur radio projects repair fix broken dead no power For the board to function correctly the PLL must be using the BCD code range of 91-135 (CH1-CH40), this is the code for SSB units. Aug 3, 2022 · Mod for 5kc steps. 240Mhz crystal with a 5. I know alot of mods for the Cobra 148 GTL including volting the final but this radio seems to be quite a bit different inside. for chnls 41-44, and the pin 16 mod. For a code of 91 pins 13,17 and 20 will be high. Too lazy to re-edit this as a standalone post, so here's what I told him: First idea would be to clear up the picture a bit. WKS 1001 PLL 858 / MC145156 / WASHINGTON / NO AUDIO OUTP. is a good page to save for future reference. Jul 9, 2003 · 738 See Tuesday, July 08, 2003 - 01:29 pm posting in this section on the Cobra 89XLR. -Trash's Mods-18ch to 40ch-10 Code's-Q Code -Phonetic: UHF CB Repeaters Courier Centurion PLL/Centurion 40D/ Gladiator PLL/ Spartan PLL/ Rebel PLL/Rebel 40A defpom Defpom CB cb schematics communications cbradio mods radiomods modification modifications expansion add ons bleep frequency ham HAM amateur radio projects Amateur mods Mods mod CB radio circuit diagrams block diagrams component data sheets intergrated circuits pinouts RF signal FET transistors cct uniden Uniden cobra Cobra president President realistic Realsitic superstar Superstar Dec 25, 2013 · Some 858 PLL radios also have a 4011 interface wired as a quad inverter, which goes in between the PLL VCO drive and also the PG divider input, so that's another area to consider. For a stock mic, the first mod above should be plenty. Orbieswar Member. I'm sure that someone one this forum knows this radio well. The same main circuit board appeared in a handful of other brands/models from 1978/79. gokarters. cut the trace and solder a 4. the middle leg is soldered to pin 19 and trace is cut to channel select with a 3. It gives you the regular 40 channels, 41 through 80 and the third bank is 81 thru 100, 3a,7a,11a,15a,19a and 14 channels below channel one (limit of the PLL in this unit). 125 on channels 1-40 (-128 channels) Note: The radio will need a re-tune to change coverage by this much ! Oct 16, 2005 · The uPD-858 sideband list is yet longer, Courier Centurion, Pierce Simpson Simba, first model President Grant. Yankee Senior Member Username: Yankee Post Number: 1311 Registered: 7-2003 Along with several other sideband radios that had the great 200 channel uPD-858 PLL, done with just a pin switching mod. There are a few different mods using the same type of switching method, here they are: PS, I have edited these to make the mods MUCH easier to do and understand, as well as more usefull ! Coverage between 25. drive mods site! BeamNG. Jul 12, 2014 · Many are common CB Radio folklore with the 02A, and 858 PLL’s being most popular in the early days of modifying your CB to get all those freeband frequencies that were so quiet just up the band towards the Amateur 10Meter allocation at 28. Nothing on the 139XLR. com/cbmods/858mod. The ribbon cable from the PLL area to the channel selector can have a problem with that socket; radio will act dead. 775 Ch3=27. And have been done and proven to work. May 7, 2005 · picture of 858 pll extra channel mod. BEST mass-produced type-accepted CB radio ever made!! ZACHARY T. Using a SPST switch, one side of the switch goes to the cut-side of pin #16. uPD858 Chassis upgrades and modifications - CLICK HERE! Aug 23, 2005 · I am handy with a soldering iron so if anyone has some power mods for this radio that would be greatly appreciated. EPROM frequency expansion add on boards for amateur CB mods, cb radio schematics service manuals and projects, mike wiring diagram, bleeps, PLL pinouts, component data sheets, transistor and integrated circuit info, communications cbradio radiomods modification modify CB radio expand modifications expansion add ons bleep frequency ham HAM amateur radio projects repair fix broken dead no power 1. Aug 14, 2014 #32 Thanks for posting the link Mar 20, 2013 · you have not said what PLL is in your grant. CAUTION! Connecting your radio to the wrong set of connectors could permanently damage your radio!! Presteps; Verify radio is working properly. It results in a more clarified signal. 7K resistor across the cut you made. Back to the drawing board. Oct 2, 2012. Modding for a variable power or a "swing mod" by changing the voltage at the collector of the final will degrade SSB performance, if you use you SSB at all. Many old time CB radio operators, of the late 70s and 80s have done many mods to this great uPD-858 sideband chassis. All modes, all channels. EPROM frequency expansion add on boards for amateur CB mods, cb radio schematics service manuals and projects, mike wiring diagram, bleeps, PLL pinouts, component data sheets, transistor and integrated circuit info, communications cbradio radiomods modification modify CB radio expand modifications expansion add ons bleep frequency ham HAM amateur radio projects repair fix broken dead no power Feb 15, 2015 · The PLL does a 1. Follow the PURPLE / WHITE wire form the clarifier control to the PC board and UNSOLDER IT. 6. pc board # is198-ab and has the 858 pll chip. All I'm saying is that it is possibly fried if you cannot test the PLL - which you must do. 73s. the 142 uses a 11. jump. Apr 6, 2005 · how do you turn up the mod on a zackery t . To reduce the risk of damaging the input circuits in the chip on pin 19, I recommend first soldering the 4. Shadetree Mechanic Delaware Base Station 808 May 3, 2005 · The '458 is a Uniden product, likewise a "private label" source for RatShack way back then. remove the channel selector wire going to pin 21, and jumper from pin 12 to pin 22 to pull pin 22 Oct 13, 1998 · RadioMods CB cb schematics communications cbradio mods radiomods modification modifications expansion add ons bleep frequency ham HAM amateur radio projects Amateur mods Mods mod CB radio circuit diagrams block diagrams component data sheets intergrated circuits pinouts RF signal FET transistors cct uniden Uniden cobra Cobra president President realistic Realsitic superstar Superstar cherokee This PLL-circuit use a 10 bit BCD programmable divide-by-N counter for 399 channels. Aug 9, 2013 · here is a link to about all the PLL freq mods. We've donated $2,224,356 to our mod authors through Donation Points. 555. 3 kohm resistor between the two. 405) is becoming popular on single sideband . Forgot to mention the previous owner(s) did the channel mod for "upper and Lower" or freeband channels and the limiter has been cut. 175 and up to 28. As far as I can tell everything else appears fine. got this radio from a friend with a channel mod in it already but it is stuck on frequeny no matter what position switch is in. Thank's again for the info Jeff! Danny Kc0gxz Mar 1, 2004 · Anyone looking for mods for the 858 PLL go here. aol. Cut pins 19 and 22 of the 858 chip away from ground and add 4. it has a SPDT switch. Keying the mike won't make the display jump in SSB modes, only AM. Maybe even a mod for the TX/RX frequency response improvement. This guy has a dozens of 858 radios. both radios produce around 22 watts but one is at dead key and the other is under modulation, it seems to me that the unit with the swing kit seems to have a lot more clairity but i am unsure as to relibality and duarbility between the two. That clarifier mod worked. is the second generation 858SSB board, and is by far the better of the two. Thread starter Ebay; Start date Sep 30, 2018; E. Feb 21, 2018 · I've had to replace the 858 PLL because of a bad channel hack mod artist. Clarifier mod is OK. just for everyone that does not have it. Amateur Radio Newsline #858 21 Jan 94. Add a 4. 125 on channels 1-40 (-128 channels) Note: The radio will need a re-tune to change coverage by this much ! Oct 10, 2014 · By far the best PLL/VCO combo out there for 10 meter conversions is the Uniden Chassis with the uPD 858 PLL chip. (2816 pll) VR6 or cut D16: Adjust L13,L12,L11 for max RF output: WASHINGTON (858 pll) VR7 or cut D23: AM Power VR8, SSB Power CT7, TX Coils L32,L30,L29,L28 : WASHINGTON{MB8719} CUT TR32: AM Power VR6, SSB Power VR7, VR1 "S"Meter, VR2 Squelch, VR3 TX Freq, VR12 Mod Meter, VR10 TX Power Meter Yes, both types can be modded for extra frequency coverage, but the instructions for modding a SSB radio will NOT work as advertised for a AM-only model, and vice versa. Both look clean and about the same price. I make a special EPROM expansion board that will add 4 more bands to many radios that use either Binary or BCD programming, it also adds a 10KHz shift function as well, click here to find out more. Sep 30, 2018 · CB MODs 11meter Channel Expansion PLL02AG MB8719 uPD861 MC145106 SM5104 uPD858. President Washington 858 PLL no modulation, clicking relays. On the 858 chip, this is done by manipulating the logic state on pin 7: Logic 0 = 5kc steps, logic 1 = 10kc steps. The 858 PLL is capable of 400 channels. The result's were; Ch1=27. I thought this radio was equivalent to the Cobra 29 XLR - and that all of the mods for the Cobra 29 XLR will work on the Honest Abe too. they use two different crystals and a different set of N codes. including Cobra, President, Realistic, Teaberry, and Robyn, among others. Because of this, these chips had an input pin that could be programmed for 5 or10 kc channel steps. It's a Midland 77-883 AM only radio. Wire the middle pin on the switch to pin 13 on the PLL. Oct 10, 2003 · Using switches the sideband only 858 PLL can do 200 channels and carry the power quite well from the low end to the high end. There are a few different mods using the same type of switching method, here they are: PS, I have edited these to make the mods MUCH easier to do and understand, as well as more usefull ! Coverage between 25. I think it has an LC7130 or 7120 in it. Fusebreaker Member Username: Fusebreaker Post Number: 96 Registered: 3-2004 Clarifier mod for President Washington and similar 858 PLL (4 pin mic)models. Resolder this wire to the PC board ground. The 139XLR, TRC 457, 458, etc. mods for the 5080 pll such as the cobra 32 xlr, 86 xlr, and tram d42. RF Parts still carry them - IIRC. Although I do have a few radios that can be moded to obtain 26. Nov 22, 2011 · Zman said: Both board have the 858 PLL but both boards are laid out totally different! Correct. Go. Z. The main reason why you rarely see any mods on the 858 chip in AM radios is because it operates in a completely Feb 15, 2016 · A datasheet for this PLL would be the ticket then the guess work goes bye bye, I believe it's some kind of mod to set a pins "logic" to a high state (5v+) when the switch (diode matrix) adds/removes the right amount of resistance in the circuit. Feb 26, 2002 · Looking for the chnl mod that was used years ago on the President Washington or Cobra 139XLR W/UPD858 PLL, useing 3 switchs as follows: switch one, single pole single throw = switch two double pole double throw = switch three double pole double throw center off. 5 kHz (I think) "jump" between transmit and receive modes when running AM. 7k ohm resistor across the cut . The mod should also work with the uPD2824 (i. 045mhz expansion 27. This is a President Washington sideband base station. hope someone also has a channel chart for this mod. Dec 11, 2009 Aug 6, 2019 · The mods required to do such a conversion look a lot more complicated than they really are. 10. Been a little hesitant to poke around in the radio with the power connected. Joined Apr 5, 2003 Messages 284 Location Pinecrest,Fl. , without channel mods. All new mods for FS22, Farming Simulator 22 on KingMods. Thread starter Orbieswar; Start date Jun 7, 2014; Status Not open for further replies. Carl CEF-357 Yankee UPD 858 MODS. To work out the BCD code just measure the voltage on pins 13 through to 22 of the PLL with the radio on channel 1 mid (FCC) band. Totally different requirements to add a carrier control. There are several 858 PLL mods to expand channels, but one specific shows having to add a circuit to get one band on the 29XLR Anyone know why? Can you do the 2 switch mod on the AM version radio? What is the recomended pll mod to get the best expansion out of the 29 XLR 858 pll? Thanks in advance! Sep 14, 2005 · I for one am in agreement with Matt about the second poorman's MB-8719 PLL mod. EPROM frequency expansion add on boards for amateur CB mods, cb radio schematics service manuals and projects, mike wiring diagram, bleeps, PLL pinouts, component data sheets, transistor and integrated circuit info, communications cbradio radiomods modification modify CB radio expand modifications expansion add ons bleep frequency ham HAM amateur radio projects repair fix broken dead no power Jul 7, 2006 · PS According to Copper, the ZT uses an 858 pll, which should also be modifiable too! Also the newer ones use the 2816 pll which I believe is also moddable Kid_vicious Senior Member Username: Kid_vicious Post Number: 1895 Registered: 9-2004 A page with mods for the old uniden/president Grant using the upd 858 PLL. 1125 crystal and switching pin 10 will cause it to go DOWN. members. This counter shows the number of hits since the 7th March 1999 Jun 14, 2005 · The cb radios i most like to use are the AX144's, Super cheetah's, followed by the 858pll Cobra's and President's, and then the Uniden Grant's and Cobra 148's. The other side of the switch goes to pin #9 of the PLL Dec 18, 2008 · What I am looking for, is a MOSFET final mod, and possibly a swing mod for it. Nov 6, 2011 · Easier 138/139xlr mod Hello, I know this thread is several months old but there is a no crystal needed 10 meter mod for the 138/139 xlr radios. May 7, 2005 895 26 28 44. Reply. htm God bless you all ! CDX-897 OT-897 WV-897 CM-2368 American Kangaroo-1897 A page with mods for the old uniden/president Grant using the upd 858 PLL. Now when you need to go to an 'A' channel do this: For 3A go to CH 4 and flick the toggle switch down. vr7 or cut d23 am power: vr8 ssb power: ct7 rx coils: l3 thru l8 tx coils: l32,l30 sams photos: #126,127,128,170,171,176,179,200,207 The CB's are listed by PLL model. - 399 EPROM frequency expansion add on boards for amateur CB mods, cb radio schematics service manuals and projects, mike wiring diagram, bleeps, PLL pinouts, component data sheets, transistor and integrated circuit info, communications cbradio radiomods modification modify CB radio expand modifications expansion add ons bleep frequency ham HAM amateur radio projects repair fix broken dead no power Mar 9, 2012 · I have 2 uniden pc68 radios and one of them has a swing kit installed and the other has output mods. Down-converting of the frequency to the divider This PLL Circuit use a Mixer and a X-Tal Oscillator to convert the output frequency f OUT to the f IN to the PLL Circuit. 445mhz Expansion: Very hard modification to find information on: This modification should open up ALL for 858 pll units only. Post by wvdx » Thursday 20th Nov 2008, 20:07. It will go clear up to 29. $12. 2)find pin#21 and do the same as you did to pin #19. I remember doing some exotic mods to the 858, 861 etc. I have some mods for the 8719 PLL that have not been in any books to get down to 26. Clarifier mod: 1. Next solder a 4. Jan 14, 2008 · Cool radio hack #2: A President Adams CB radio, 40 channel, 858 SSB chassis. e. Both had speech clipping circuits, but the AMC on the 139XLR board is light years better. cobra 138 139 xlr (old) president grant, wasington,madison , roybn 510 , 520d ,trc-449 457 and 458. The X-Tal frequency is f XTAL = f OUT - f IN EPROM frequency expansion add on boards for amateur CB mods, cb radio schematics service manuals and projects, mike wiring diagram, bleeps, PLL pinouts, component data sheets, transistor and integrated circuit info, communications cbradio radiomods modification modify CB radio expand modifications expansion add ons bleep frequency ham HAM amateur radio projects repair fix broken dead no power Many of the older PLL chips, like the PLL02A and UPD858c, were used in applications other than cb radios. Mar 25, 2013 #1 Sep 12, 2006 · There are 2 different models of the Washington, one has the UPd 858 PLL and the second model has the MB-8719 PLL, each of the 2 models mods differently. Hi, Nov 13, 2013 · Does anyone know if any of the early 858 uniden transistional PLL boards found in the first generation Radio Shack,Courier,Palomar, and maybe some other SSB base units is similar to the later 858 clone chassis that there's installation data for the RFX modules? While thes chassis have PC Jul 8, 2010 · the PLL mods on a 142 will NOT line up with those of a 148gtl. Uncle Ray wrote: This document provides instructions for modifying a radio's PLL chip to access additional frequency channels. Rick Technical Helper Posts: 1041 Joined: Sunday 4th Jun 2006, 0:52 This counter shows the number of hits since the 7th March 1999 EPROM frequency expansion add on boards for amateur CB mods, cb radio schematics service manuals and projects, mike wiring diagram, bleeps, PLL pinouts, component data sheets, transistor and integrated circuit info, communications cbradio radiomods modification modify CB radio expand modifications expansion add ons bleep frequency ham HAM amateur radio projects repair fix broken dead no power EPROM frequency expansion add on boards for amateur CB mods, cb radio schematics service manuals and projects, mike wiring diagram, bleeps, PLL pinouts, component data sheets, transistor and integrated circuit info, communications cbradio radiomods modification modify CB radio expand modifications expansion add ons bleep frequency ham HAM amateur radio projects repair fix broken dead no power Welcome to the best BeamNG. Wire the bottom pin on the switch to a constant supply voltage that is the SAME AS THE PLL PIN CONTROL VOLTAGE. Hi, Anyone know the mods to put a irf520 final in a cobra 29 XLR with the 858 pll. Both have 5 pin mic jacks. FA: Vocom 75W 858 MHz Repeater Power Amp *NEW* 8. 400 instead of 27. 845 and 27. look at the chart I just posted. Process: The process for performing this mod is a bit easier compared to the PLL mod. Go To The Defpom CB Radio Simulator software page. Report to moderator Logged firebottle Hero Member Posts: 550 Re: Ye Olde 858 restoration and mods « Reply #2 on: August 08, 2012, 01:51:43 PM » May 21, 2006 · Along with several other sideband radios that had the great 200 channel uPD-858 PLL, done with just a pin switching mod. 7K resistor Jun 8, 2014 · President Madison 858 PLL. #17. Sounds like the PLL circuit has a problem somewhere, could be the 858 chip, try puting the switch conversion back in and do the broadbanding that is shown on the 858 mods. Thread starter Carl; Start date Mar 25, 2013; Carl Technologicaly Challenged. A President Washington that I put a mosfet in, and a NIB Midland 79-893. there is not a lot because it does not need much if it is the 858 PLL. Modifications POWER MOD: 1. May 27, 2010 · Someone has added extra channels to the radio. Apr 5, 2014 · Also at this time UNIDEN 8719 PLL radios were starting to show with 18 chan switches fittedThere were even some 18 channel 858 radios !! I had a 858 Grant once it had a 40 switch but when you went to 24 it blacked out and the radio would not tx or rx until it was rotated back to 1 or 23. Just one switch if possible. , useing three switches and a fourth switch for 10 KHz. Models include:- Pace 8093,Royce 582/651/639/642,SBE LCMS-4 and Sommerkamp TS310-DX. com. 000 MHz. . and other PLL chips, r capable of or example, cr Jun 16, 2007 · Thank you Rambling Man I will give it a try this weekend. Oct 8, 2011 · I know some plls have a minimum freq they will accept; not sure of the 858 pll is the same or has a freq/max. So, for aligning/fixing these radios - he gave me one. I have a 2000GTL a Madison and a Grant LT that have the mods in and they work great. And my Car Audio section, for the website of one of the top sound off cars in N. Jul 18, 2014 #8 Dec 17, 2020 · 858 PLL Mods and stuff. 120Mhz crystal, so I could get 5kc steps out of the PLL do you think this would work for me to then be able to get on the zero's aswell as the normal channels? cheers again,Shaun Jan 14, 2008 · Cool radio hack #2: A President Adams CB radio, 40 channel, 858 SSB chassis. any additional input is cool as I havent installed was the PLL I its CB ex-ell along. Mar 16, 2013 · Working on three 858 chassis radios for local op. Your writeups are excellent. Sure that either unit_399 or Xit13 is familiar enough with these chassis to make it simple once they read this thread. It had a extra PCB added inline with the chan switch. 765 Ch2=27. It will be is connected to ground by a very small land. The only difference between the Radio Shack line and the rest is that the Radio Shack models had the microphone gain inside on the PC board. The uPD858 PLL chip was used in both sideband and AM-only CB radios in 1977 and '78. 3. FA: *LAST DAY* New Vocom 858 MHz 75W PA. iyek fzcyi wfoigb tmc kadoxc olsegiy yrdvt wfsm sfy ckkqh