Pll cb radio review forum. 6)Solder a 1n914 diode .

Pll cb radio review forum 6)Solder a wire Jul 9, 2009 · Simple AM radios used this chip with three quartz crystals in the radio, total. Move shorting resistor over to the two pins to it's right. Sep 4, 2017 · The WorldwideDX Radio Forum was originally established in 2001. Back to the 9v situation. Feb 16, 2012 · The WorldwideDX Radio Forum was originally established in 2001. On CB channel 1, the VCO feeds 16. 00 . MB 3756 voltages all check out. Mar 13, 2012 · The old Washington, with the UPD858 PLL, is a 4 pin. 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. Sep 15, 2024 · by Jay_rystl1 » 15 Sep 2024, 22:02. FCC Data: Classic PLL 40 Sams Photofact #: CB-186 (April 1978) Modifications and fixes: Reviews: Options / Accessories: Mar 20, 2013 · The WorldwideDX Radio Forum was originally established in 2001. 7uF electrolytic capacitor which is part of the RX +8v and near the RF Gain circuit, I have never heard of this mod. The trouble is they're hacks who THINK they know radio like some CBers always have but all they do is make them jump through hoops they were never intended to do. A cap feeding the PLL is the fault point. Nov 18, 2016 · The WorldwideDX Radio Forum was originally established in 2001. Sep 20, 2011 · CB shops get mixed reviews like 222 Papa Bear, some love him, some hate him. Why throw down 300 dollars on a new 23 channel radio when next month you could have 40 channels ( or more) to use. 2)Cut the trace around pin 9 and 8 . One was the traditional 23 channel crystal control unit. Jul 16, 2012 · The WorldwideDX Radio Forum was originally established in 2001. I have 8 volts at R95, 8 volts at Pin 9 PLL, but . 5)Install a 6 posistion/ double pole rotary swicth in the radio. They showed up around the time that the 40-channel expansion was announced. The MC145106 runs out of binary when pin 6 is switched on even with a crystal change for one that's higher than the original. 5)Install a 6 position/ double pole rotary switch in the radio. Everything i have read about the PLL IC's in this radio Say's that the NDC40013(M58476) PLL is the later chip used to replace the earlier MC14568/MC14526 pair. If it's much lower than that on the cathode (band) end, the PLL is not fully locked. only paid a dollar for the radio with an external speaker as well. Here is the problem: On bands A and B it is on 28. Dec 18, 2008 · This radio has been a standard 'go to' radio of CB fans for decades. And most common channel mods are shown with good examples that are easy to follow. When the radio is cold TX may be OK but as you transmit the meter falls and eventually is zero. Hoping someone knows where i can find one. Dec 8, 2015 · Don't see why it shouldn't; according to the schematic for the radio, it shows the MB8719 for the PLL. Aug 26, 2001 · The WorldwideDX Radio Forum was originally established in 2001. org. (Looking at radio from front) 4. ANL Switch and 7 Watts of Audio Output. Nov 26, 2009 · They directed that any new models had to have less expandability and power potential. Jan 9, 2023 · Cobra 140GTL, 142GTL. 5. more than likely you have a power balance issue and the service manual shoul help you find the problem. All requests will be deleted and a forum infraction issued. Thanks! Jul 25, 2011 · The WorldwideDX Radio Forum was originally established in 2001. Apr 11, 2007 · The PLL uses a crystal to "mix down" your VCO frequency in that radio. Jul 18, 2018 · The WorldwideDX Radio Forum was originally established in 2001. It's okay to go above 28. This radio has all the above in it! Magnum Raptor 10 Meter AM Export Radio Review The Magnum Raptor II is a combination microprocessor and phase-lock loop (PLL) controlled radio combining both high RF performance with a user-friendly front panel. The older radios didn’t meet the tighter frequency tolerances required of today’s CB radios. Typically depends on the supply voltage to the PLL chip. Jun 14, 2009 · rbodenbender wrote: general internet picture, not the exact radio i have. 3k resistor across the cut 2. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. Nov 7, 2004 · Has anyone ever used or fitted a MC145151 PLL to a CB radio. I believe the AM radios share a common PLL unit and the sideband radios share a common PLL unit. The WorldwideDX Radio Forum was originally established in 2001. com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals and a whole lot more! Jun 22, 2014 · FOLKS, I plan to have my tech align fully my Courier Centurion PLL ssb 40 channel base soon but don't really see the service manual out there yet. 24 mhz signal into the DO pin of the PLL and I did get noise on the speaker with an antenna hooked up however when I transmitted a working radio on the Mar 20, 2013 · Built during the time that the FCC was trying to decide if it was going to be 23 channels, 40 channels or 99 channels. then run wires (the red lines) from the switch position's to the locations on the pc board. This was the very first PLL synthesized CB that Pace ever sold and it was actually a great little radio with a good receiver and nice transmit audio. Oct 17, 2015 · My bad guys. Cut the trace going to pin 10 of the PLL and install a 3. 3k resistor across the cut 3. 36 Mhz source. they build and program the complete PLL circuits. Apr 25, 2017 · Eventually, seeing that the VCO frequency is below the crystal it gets mixed with, it made sense. Sounds like alignment is needed and possibly clarifier unlock. Jun 17, 2009 · The WorldwideDX Radio Forum was originally established in 2001. If anyone knows definitively whether or not the 641 PLL unit is the same as the 632 PLL unit, I would sure like to know. Sep 10, 2013 · Please do not make requests for copies of radio programming software which is sold (or was sold) by the manufacturer for any monetary value. Apr 3, 2005 · The uPD858 PLL chip was used in both sideband and AM-only CB radios in 1977 and '78. 36 MHz signal is still there at pin 4 of the TA7310 mixer chip, but the stronger level from the Expo kit drowns it out. The 139XLR and similar radios used single conversion in the receiver. Sep 15, 2024 · Amateur Radio Chat; ↳ Amateur Radio - General Topics and Discussion; ↳ Amateur Radio - Digital voice and data; ↳ Amateur Radio - Equipment Discussion; ↳ Licensing; CB & 11m Radio chat; ↳ CB Radio - General Topics and Discussion; ↳ CB & 11m Multi-Mode Radio Equipment Discussion; ↳ CB & 11m Multi-Mode Modification & Repair Aug 4, 2017 · The WorldwideDX Radio Forum was originally established in 2001. Keep the wire from the "N" kit as short as possible and adjust the upper and lower channels using the variable caps on the "N" Kit. Note: This is The Smaller HC25U Plug In Crystal. Backlit LCD Display. Aug 30, 2018 · The Expo kit has a crystal oscillator with an output level several times the level of the radio's internal 15. Enjoy. 585. That's a great find! ~Cheers~ Uniden PRO510XL Pro Series 40-Channel CB Radio. The Expo kit's output overpowers the PLL input, moving all 40 channels up or down. The RCI-2970N2 10 Meter AM/FM/SSB Export Radio Review What do you get when you take one of the most popular SSB 10 Jul 29, 2012 · The WorldwideDX Radio Forum was originally established in 2001. The Magnum Raptor is built rugged to withstand years of use in harsh mobile environments. Any effort to compare the diagram of a sideband radio to the AM-only Zachary T will reveal big differences. To get 40 channels from crystals alone would require a pile of crystals. PLL circuits are now frequently being used to demodulateFM signals, making obsolete the foster-seerly and ratio detectors of earlyyears. The missing control is the Delta Tune knob. The Cobra 2010 is a nice radio, but fell short of being comparable to theCobra 2010 GTL AM/SSB CB Radio Review This was Cobra's attempt at a cheaper and newer style replacement for Apr 14, 2002 · The WorldwideDX Radio Forum was originally established in 2001. Sears Road Talker 40 SSB Model 663. The Cobra 142GTL, Uniden Washington, Tram D300 had single-conversion receivers. Unique PLL Circuit. Bands E and F are on 29. That would be a DC voltage that changes in step with the selected channel frequency. Photo shows jumpers in converted slots. It's just my typing skills. The rest of what's inside is completely different from any NDI radio, but similar to the TRC-457, original President Madison and Washington, the ones with the 4-pin mike socket. Nov 28, 2018 · Here is the schematic I made for the Royce 1-621 PLL unit. The later GTL radios were built both ways. Just CB to amateur radio 10 meter band where Technicians have voice privileges. 1125. Compact Design. but it is the identical model though. I hope it helps someone. 6)Solder a 1n914 diode from pin 1 to pin 4 on the switch. RCA 14T260, 14T270, 14t303, 14T304, 14T305 Aug 1, 2006 · The WorldwideDX Radio Forum was originally established in 2001. there is a shop in your neck of the woods that is a husband, wife and her father that repairs radios and they are great with radios. Would rather find an upgraded version like in the 4a or something similar to the nomad boards that use to be around Oct 24, 2016 · The WorldwideDX Radio Forum was originally established in 2001. Fits Any Model Radio With Original Crystal Of 11. com Welcome to our site! EDAboard. Dec 4, 2009 · The WorldwideDX Radio Forum was originally established in 2001. she has been a member on cbtricks for a few years and her Nov 20, 2009 · 1)Open the radio and you will find a metal case around the pll chip. unsolder this. Some folks like this design, others not so much. it has the 02a PLL and you can easily put lower channels in it since this pll is easy to do. Feb 15, 2016 · Last night I stumbled upon Radio Tech's own forum and found: "Understanding how CB radio works" Following some things I read, I attempted to find a 10. and the 8719 PLL chip is a Seimens as Jul 2, 2009 · 1. The fact is that the SSB mode can be used on any of the 23 channels, but this occupies the channel and does not further divide it up for traffic beyond what the channel had to begin with. 000 MHz. then run wires (the red lines) from the switch posistions to the locations on the pc board. If the radio is being used as a base you'll be fine, but if you're going to use it mobile, I'd recommend you stay away from them, along with the Galaxy 949/959/979 radios. Nov 12, 2013 · Advantage of a PLL in a CB is cost. Also attached is a PDF I found online for the 1-632 that contains a schematic for that PLL unit of that radio. 6)Solder a 1n914 diode May 2, 2024 · A radio that says "GTL" on it will be newer than any 1978 radio, but possibly not by more than a year. Re-assemble radio, and do a full alignment. Mar 19, 2023 · Very good for expanding freq coverage. Cobra 2010 GTL AM/SSB CB Radio Review This was Cobra's attempt at a cheaper and newer style replacement for the Cobra 2000. . their main work is commercial radio repairs and she can change every thing inside a radio and make it cover so many channels. Jan 26, 2008 · Voltage changes on the PLL programming pins if you rotate the channel selector. Coming from a hobby history of everything from 23 ch radios with crystal switch boxes, to PLL jumps, to Digi-Scans, to the HR-2510, the RCI-2950 was a letdown. 56 MHz crystal to "mix down" that 16. it will not xmit, and the RF meter is stuck halfway. 270 MHz (on AM mode) into the receiver mixer and the transmitter mixer. Thanks a million mate I'm very curious about what that IC803 does. As everyone knows the Cobra 2000 was one of the best radios ever, and is very sought after. When the VCO frequency goes up, the mixer output frequency goes down. Move shorting resistor in front of board over 1 pin to the left (3 pin jumper). Powers up, decent power out. CB RADIO Repairs & Mods Jan 29, 2012 · Picked up a rough looking Palomar 2400 at a garage sale today. Jul 6, 2014 · The WorldwideDX Radio Forum was originally established in 2001. This was a functional feature back in the 23-channel crystal-controlled radio days. There is a very common misconception that SSB "adds" channels to the range of usable frequencies on a CB. (Secret CB Vol. This pin may oscillate between 8 Volts and ground if the PLL is only marginally locked in. It has left a permanent mark on the minds of beginner radio operators and veterans alike. I can still remember hearing a Cobra 148 that left an impression on me back when I first got into CB's in the early 1980's. Dec 28, 2020 · It is a 23 channel CB radio with SSB capability. Jun 17, 2008 · The WorldwideDX Radio Forum was originally established in 2001. There were PLL-controlled 23-channel radios. The difference between those two frequencies feeds into the PLL. 7 MHz. 240MHz), and hooking it somehow to C12, a 4. The first generations had the best workmanship but being 30 to 40 yrs old now they would need some work to put them in new operating condition. Public Address. 27 so that what is fed into the MC145106 PLL chip's pin#2 is 2. 4)Solder a 4. 035 Any ideas as to what the problem Mar 8, 2015 · In need of a pll board for this radio. Those aren't the easiest radios to come by, ESPECIALLY new. In 1981 i designed a scanner and channel extender for CB radio and an FM module, for many years it was itching to do it again with modern technology, recently a friend gave me a beat up super panther and i made some new designs. 6. the radio us unmodified and Sep 24, 2009 · If the radio uses an 11. The cathode is connected to pin 6 of the PLL chip, the lock-detect pin. Sep 29, 2022 · The WorldwideDX Radio Forum was originally established in 2001. 4 at R63 (The schematic shows 8 Volts at R63). 7k resistor from pin 8 to ground. The mod I'd like to get is the DigiMax Lite from Australia which lists on e Feb 11, 2024 · That is a common problem with CB 555 and 550 (like you said, they are the same radio, if you open a 555 there is the chassis of a 550 inside of it). This seemed like a big savings compared 14 crystals or more in a 23-channel conventional CB. Cut the trace going to pin 9 of the PLL and install a 3. 135, no matter where the channel knob is, freq doesnt change. Tune up info in SecretCB volume 11, page 42 - available on CBTricks. Solder a wire to pin 10 of the PLL before the resistor 4. Thank you! RCI-2970N2 10 Meter AM/FM/SSB Export Radio Review What do you get when you take one of the most popular SSB 10 meter radio lines (2950DX/2970DX) and add more power? The new RCI-2970 N2. Apr 13, 2011 · Connect with CB radio enthusiasts at CB Radio Talk Forum. ) FYI, the last two Sam's manuals in the cb radio series (#s 292 & 293) weren't called CB Photofacts, but rather were called Sam's CB Radio Service Data. The 8-band Galaxy with that pc board uses a 13. 3258 MHz crystal found on most MB-8719 chassis to avoid this. Making a request such as this is attempting to engage in software piracy and this forum cannot be involved or associated with this activity. The plug names and lines going to / coming from the CPU/PLL board are the same names and pin-outs. Bands C and D is on 28. We are working every day to make sure our community is the best Radio Hobbyist's site. 5 into the general-plus band (their siblings or I can use that range). Mar 19, 2019 · Something you would probably find only on a really old PLL CB. it receives, but it sounds garbled. I think it was the same chassis as the Aug 25, 2014 · Please do not make requests for copies of radio programming software which is sold (or was sold) by the manufacturer for any monetary value. Welcome to EDAboard. ] Jun 13, 2022 · Looking for a CB radio that won’t break the bank? The Midland 75-785 40-Channel CB Radio is an affordable yet reliable option for your short-range communication needs. Jan 19, 2020 · I have another 19+ that works OK but the radio looks like it was run over by a truck, I took the PLL IC, 10. Jul 17, 2012 · The WorldwideDX Radio Forum was originally established in 2001. A PLL chip and two or three crystals was cheaper than 14 crystals. Mar 6, 2015 · The Motorola CM550/555 uses the TC9105P pll chip, which can be modded for uppers. My intention is to fit one in a 3900 to give it the facility to switch down to the zero's. Other applications for PLL circuits include AM demodulators, FSKdecoders, two tone decoders and motor speed controls. The radios have a RCI8719. This is the 40 channel rotary dial ssb base CB. Aug 18, 2021 · A little more trivia on the Pace CB-166 shown in the ad. With CB sales way down, Uniden redesigned their CB line with the emphasis on low cost rather than max performance. Needless to say, the internal arithmetic for the 3-crystal radio is not the same as in the two-crystal PLL circuit. Dec 26, 2014 · My first radio was back in 1976 , it was a Realistic Mini 23 with a Realistic desk power mic and an Archer 3 element beam . Mar 20, 2013 · The WorldwideDX Radio Forum was originally established in 2001. Jun 24, 2020 · The WorldwideDX Radio Forum was originally established in 2001. 73's 1137 Southern Ontario Canada. The PLL technique has, surprisingly, been around for along time. May 30, 2013 · here is the service manual for this radio. Feb 23, 2014 · The 641 is a sideband radio and the 678 is an AM radio. I have done it with two radios: A HyGain 1 (model 2701) that I also had modified to 10 meters, and a Midland Export radio model 7001 that I left otherwise original. picked up a diamond in the ruft at a yard sale the other day. on AQM lowers isw what is used. The radio's stock 15. 24 mhz crystal, and variable cap out of that radio and put it in the non working one but it still acts the same also I injected a 10. The setup to install a carrier control in a sideband radio is nearly always different from what's needed for AM-only models. It's got extra channels uppers already. Aug 21, 2006 · The WorldwideDX Radio Forum was originally established in 2001. Mar 8, 2011 · The PLL book goes over how Crystal mixing works , common PLL types used in cb radio, truth charts And understanding how phase locked loops work. Dec 2, 2016 · Some info floating around online is meant for the 858 Chassis radios, not just any radio with a 858 PLL. When you get the radio, remove the top and see what you have. By this time the CB craze was winding down, and SBE, Stoner, CPI, Teaberry, etal had already closed shop. Although engineered with mobile use in mind theMagnum Raptor 10 Meter AM Export Radio Review Jul 27, 2004 · The WorldwideDX Radio Forum was originally established in 2001. If you have another radio to use, I'd keep that one new/unmodified. Thanks for the info. & Comparing the 21XLR to the 452 shows they are almost the same exact radio, then comparing the schematics between all three models I found some May 2, 2009 · 5 kHz shift mod for PLL02A radio This mod is certainly possible with PLL02A based CB radios. The PLL unlocks especially as the heat comes up. I can help you from there. "VCO test point" probably refers to the VCO's DC tuning voltage. Dec 25, 2017 · Even the new 29 LX-LE radios have the 22 pin uPD2816 or their rebranded Cobra 29LTD chip in them in the schematic. It is best to use an 11. Pin 14 of the PLL is the Reference Oscillator Buffered output (10. Later they figured out how to do it with only two crystals. The Cobra 21X and Realistic TRC-452 use the same style of circuit board/pll can layout. Apr 20, 2016 · The WorldwideDX Radio Forum was originally established in 2001. Jul 26, 2012 · 1)Open the radio and you will find a metal case around the pll chip. I owned a 2970DX for many years and I found it was the perfect radio for talking DX on SSB. If there are 2 buttons lower right side, it is the 858, if it has 3, it is a later model with MB8719 and shoud have 5 pin mic connector. It's a decent radio if complete and working for ~$20. May 13, 2021 · CB Radio Forum . 38100050 I have read and was told that this particular radio is somewhat rare and it has the 2824 pll chassis CRE 8900 10 Meter SSB Export Review; CB Radio PLL List for alignment of models; Website Activity 2022/MARCH; CB Radio Forum; Forums . Oct 26, 2014 · The PLL chip is good, the build quality of the radios are bad. Oct 23, 2017 · 3. Should have about 8 Volts on both sides. Although the Midland 75-785 comes at a low price tag, it’s by no means a radio that will last you a few months, similar to the Uniden PRO505XL Nov 6, 2011 · I also do not need to retain CB frequencies in the radio, the less they can get into trouble with, the better. Does serve to explain why this kind of radio expands below channel 1 a lot better than it expands above channel Jan 26, 2018 · The Cobra 148GTL was a good radio in its day (late 1970s) but far from the best. Jul 5, 2007 · Rick, i have sent the truth chart to you with the N-codes as measured on my 18ch radio. The second released here by EXPO INTERNATIONAL was an 18 channel PLL unit using the NIPPON NDC40013 NDI . They were made in Malaysia in 1995. Cobra’s latest 29 radio has all but one of the features of the original Cobra 29 LTD. Feb 27, 2015 · This guy Lou Franklin is the real deal and really understands the technical side of CB including export radios, PLL circuits etc. Feb 21, 2022 · The Epoxy encapsulated CPU/PLL board is most likely the same or similar to an earlier Cherokee CB radio, the CBS2100, which has a LOT more info on the page. Such as the 6 Position Crystal Switch Kit. Oct 6, 2021 · Please do not make requests for copies of radio programming software which is sold (or was sold) by the manufacturer for any monetary value. Both work great with this mod. See the link from Sonoma above. 12, page 7. Mar 31, 2016 · The PLL40's were the radios that hadn't been shipped before the 23 to 40 channel change over in 1977, they made the type acceptance by the FCC, the Pearce Simpson Simba radio was the same circuitry but didn't make the acceptance because of the lack of modulation limiting. Basically when D31 is lifted and I supply 8 volts to lifted anode of D31 the radio will TX and RX great, but no channel selector or Nov 8, 2017 · The WorldwideDX Radio Forum was originally established in 2001. May 3, 2005 · Has the big, fat "uPD-858" Pll chip, which is not "locked", and can be modded for added frequency coverage. Poor solder joints plagued the radios. Not a standard thing that would be the same on every radio. Solder the other end of this wire to one of your toggle switches 5. 3250 MHz crystal you will need to compensate on the CB band by using the voice-lock. It's close on alignments, just want my veteran tech to be sure he has the appropiate documents Mar 2, 2014 · Who remembers the TRAM XL5 ? Here in Australia there were at least 3 different versions. Sometimes they get lucky, sometimes they don't which leads to those mixed reviews. 240 Mhz signal at Pin 2 of the PLL [With the notch facing west Pin 1 would be at "bottom left corner", like a standard MCU I assume. Jun 22, 2014 · The WorldwideDX Radio Forum was originally established in 2001. CB was a hot topic at that time , very popular and guys were holding on to there cash waiting to buy a new radio. Apr 15, 2017 · good info to have, thanks. The sams schematic (for the 621) shows the 9v comes from the DC source, through L1 (RF choke), then through R63 (68Ω) to a pair of zener diodes (D9A and D9B). If I end up getting maybe I'll post a picture of it. 1 Item of 40 Channel PLL CRYSTAL FOR CB RADIOS. Nov 22, 2011 · The WorldwideDX Radio Forum was originally established in 2001. Fuel your knowledge, unlock secrets, and engage in discussions. President (then called American Radio) also sold a mobile Apr 9, 2004 · The WorldwideDX Radio Forum was originally established in 2001. Dollar Apples to Dollar Apples: HR-2510 beats the 2950 hands down on receive quality IMO. Apr 23, 2018 · Check D31, near the 8719 PLL chip. but, the radio needs a little work. msnxr vzyhz cfcdc hknq esqk cbn ujfghh jmsbq xresq xtoqz