Lc7185 pll mods The CB's are listed by PLL model. The LC7185-8750 incorporates PLL circuitry and a controller for CB applications on a single so I have a radio shack 503 I am trying to mod it has the LC7185 PLL in it I was hopeing I could "hack" the pll and have some funn but it seams this pll has never been put in a 503 befor my model in 99 so I can't find any info on my perticuler radio I did find one mod for a 503 but it intails altering components that mine dose not have. 2 Mar 11, 2007 · breakdown5 Newbie Posts: 4 Joined: Sunday 11th Mar 2007, 17:44 Location: new york usa breakdown5 Newbie Posts: 4 Joined: Sunday 11th Mar 2007, 17:44 Location: new york usa in the cb pll data book, lc7185 m58472p: m58473p mb8719/8734 mb8733 mc14526 mc14568 mc145104 mc145106 mc145107 mc145109 mm55104/114/124 mm55106/116/126 mm55107. 685-26. LC7185 PLL. The mod limiter will be disabled on the radio. This chip uses ROM programming with direct VCO division. The controller handles the PLL circuitry, frequency data ROM, channel preset/recall RAM, and LED display driver. patreon. Thanks for your try. Did it suddenly happen ?: Bought one for $5 off eBay and took a look inside. Maybe a diode that needs to be clipped for modulation. Includes U. 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. I have not been able to find this info yet. · Pin-by-pin functional description for nearly every PLL device used, old or new. Not a terribly bad rig for $5! Anyways, no modulation potentiometer, so I did the old "GE" mod on it and bypassed the diode nearest the audio transformer. It only has one programming bit to step UP or DOWN,getting rid of the BCD channel selector switch. Jul 26, 2007 · All varible adjustments are clearly labaled on the circuit board, but there is none for AMC or MOD. 240MHz), and hooking it somehow to C12, a 4. LC7185 Datasheet. lc7185 Models include:- Cobra 18RV/23+, Midland 77-099/77-162, Realistic TRC476/TRC477. so I have a radio shack 503 I am trying to mod it has the LC7185 PLL in it I was hopeing I could "hack" the pll and have some funn but it seams this pll has never been put in a 503 befor my model in 99 so I can't find any info on my perticuler radio I did find one mod for a 503 but it intails altering components that mine dose not have. * Perfect for 10-Meter Ham conversions or the type of PLL modifications described in THE CB PLL DATA BOOK. That sure enough got some modulation into that thing. It also supports channel scan, channel preset/recall, and emergency channel call. Cobra2000 Junior Member Username: Cobra2000 Post Number: 16 Registered: 6-2007 We would like to show you a description here but the site won’t allow us. Find the PLL and then find the mod :) LC7185. PLL Number: LC7185 Test gear available: multi meter Symptoms: No Tx or Rx What is working: WX, red TX light What has been tried: SWR Power meter no output also tried a different mic from a working radio as well as the original mic from this radio on the working radio, Cobra 25LTD. M58476. No chance of modification. 125 on channels 1-40 (-128 channels) Note: The radio will need a re-tune to change coverage by this much ! This page shows the pinouts of various PLL chips ! Updated 19th March 2001 ! LC7185. Models include:- Cobra 18RV/23+, Midland 77-099/77-162, Realistic TRC476/TRC477 LC7185 datasheet, LC7185 pdf, LC7185 data sheet, datasheet, data sheet, pdf, SANYO, CB Transceiver PLL Frequency Synthesizer and Controller Dec 24, 2005 · kid_vicious i have never hear of that pll chip,but i have not pulled the cover off the radio yet. Manufacturer: Sanyo Semicon Device. PLL Frequency Synthesizer: LC7136: PLL Frequency Synthesizer: LC7137: PLL Frequency Synthesizer: LC7185: PLL Frequency Synthesizer: LC7185-8750 (pdf) LC7232: Single-Chip Microcontroller with Display driver and PLL: LC7233: Single-Chip Microcontroller with Display driver and PLL: LC72322: Single-Chip Microcontroller with Display driver and PLL The LC7185-8750 incorporates PLL circuitry and a controller for CB applications on a single CMOS chip. Along with the instructions, I will be using pictures to help the viewer perform the mod, because a ‘picture is worth a thousand words’. (FCC). , and European chips, plus Oct 31, 2007 · so I have a radio shack 503 I am trying to mod it has the LC7185 PLL in it I was hopeing I could "hack" the pll and have some funn but it seams this pll has never been put in a 503 befor my model in 99 so I can't find any info on my perticuler radio I did find one mod for a 503 but it intails altering components that mine dose not have. 1. M58473P. Pin 14 of the PLL is the Reference Oscillator Buffered output (10. , U. S. pll: chassis: radio make: radio model: great uk: na: academy: 501: msm5807: na: alaron: b4900: m58473p: na: american motors: 32311847: m58473p: na: american motors Jul 12, 2014 · Dual Conversion AM/SSB US/Australian Models: Cobra 148 GTL, 148 GTL-F, Cobra 2000GTL, 2000 GTL-WX, Pearce-Simpson Super Bengal MK II, President Grant (new), Madison (new), Uniden Grant, Grant XL, Madison: <L38, TR24-AMC, VR11-ALC, VR10-AM Power> ButtFuzz’ PLL Peak Tweak KG4ZPN’s CB Tune by PLL Type There is no guarantee expressed or implied what PLL is in that radio? The TRC-444 should have the LC7185 in it. Hope this helps, Lon Tech808 CEF good rad shak radios for mods are the TRC-457,458, and · How and where the PLL provides all the required mixing signals for CB operation. MB8719. . The LC7185-8750 incorporates PLL circuitry and a controller for CB applications on a single CMOS chip. This 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. Adds up to 120 extra channels. MB8734. TR24 or Modulation Oct 31, 2007 · so I have a radio shack 503 I am trying to mod it has the LC7185 PLL in it I was hopeing I could "hack" the pll and have some funn but it seams this pll has never been put in a 503 befor my model in 99 so I can't find any info on my perticuler radio I did find one mod for a 503 but it intails altering components that mine dose not have. This 27 MHz band, PLL frequency synthesizer LSI chip is designed specifically for CB transceivers. This #PLL #CB #Arduino #electronicscreatorsJoin my Patreon and support the channel https://www. K. Datasheet: 262Kb/13P. The specifications are suited for use in U. com/microchipzJoin the official channel Facebook group http The LC7185-8750 incorporates PLL circuitry and a controller for CB applications on a single CMOS chip. 7uF electrolytic capacitor which is part of the RX +8v and near the RF Gain circuit, I have never heard of this mod. Description: CB Transceiver PLL Frequency Synthesizer and Controller. harmonics, splatter etc. Part #: LC7185. Expands frequency range of most PLL type CB radios. The EXPANDER 160 is a compact crystal oscillator which allows up to four crystal mixing frequencies to be injected into the PLL synthesizer circuit. MC14568. M58472P. · How the major CB manufacturers easily convert 40-channel American rigs into "export" models which often have up to 320 channels. It will not be needed – with the NPC mod, the harmful effects of over modulation will not take place – i. MB8733. e. So Remove D9 and solder a jumper in its place. A. if it does have the LC7185, what would need to be done to add ch's? if it has another chip other than the LC7185 then what must be done to add ch's? or can it? thanks for all the help! and Merry Christmas to ALL!!! Bruce Senior Member Username: Bruce so I have a radio shack 503 I am trying to mod it has the LC7185 PLL in it I was hopeing I could "hack" the pll and have some funn but it seams this pll has never been put in a 503 befor my model in 99 so I can't find any info on my perticuler radio I did find one mod for a 503 but it intails altering components that mine dose not have. Oct 31, 2007 · so I have a radio shack 503 I am trying to mod it has the LC7185 PLL in it I was hopeing I could "hack" the pll and have some funn but it seams this pll has never been put in a 503 befor my model in 99 so I can't find any info on my perticuler radio I did find one mod for a 503 but it intails altering components that mine dose not have. pll: chassis: radio make: radio model: great uk: na: academy: 501: msm5807: na: alaron: b4900: m58473p: na: american motors: 32311847: m58473p: na: american motors LC7185 . Also, the fuses are checking good. trmygnwab pzpbrqou twzasy tpavofo stdo haugjpl mciiu iysx yaqqx badrddw qgttm lkh hroffpq wucjrj jmx