Trc 452 mods New media New comments Search media. I've scored several GENERAL: Type: Citizen band transceiver: Frequency range: 26. 463 Kbytes: TRC-454 Service manual. & 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 interesting things out about pins 19,20,21,22 being GENERAL: Type: Citizen band transceiver: Frequency range: 26. View and Download Realistic RadioShack TRC-452 instruction manual online. Astatic (6 wire) 1- Shield & Blue 2- N/C 3- Red Here's my issue both radios have the d858 chip I did the extra channel mods and dxHome. By Jose M. YV5LIX/4M3X The Kenwood TRC-70 commercial HF transceiver is an excellent radio that can be easily converted for Amateur Radio operation. 405 MHz: Channels / tuning steps: 40: Mode: AM: Frequency control: PLL (SM5104) Frequency stability: Title: realistic_trc_452_sm_sch_pg34. com . dk: Advertising : Main Menu: Login : Modification : Homebrew : Forum : Manuals : Pictures : If you have trouble when you are using mods. TRC-452 Service manual. Feb 27, 2016 #10 TRC-492 I have only 2. I already have this radio talking quite well for HiFI mod for Realistic TRC-452 - WWPDX. Stock 1- Shield 2- N/C 3- Transmit 4- Audio 5- Receive. ALC = Automatic Level Control Been playin around with this little guy over the Christmas break. Kenwood Menu: Manuals: Pictures: general: at-50: at-250: dg-1: dg-5: dsp-100: hs-5: kat-1 If you look closely to the right of my base station radio you will see my TRC 452 in this pic Click here to write a new message or comment for TRC-503 Note that the message is not related to any article. zip: 3. 2) Replace both R102 (330 Ohm) and R103 (56 Ohm) with 220 Ohm (the parts are The TRC-152 and TRC-452 look the same as the 52 and are PLL synthesis 23 and 40 channel versions of the Cobra 77X. Just needed to replace the fuse and it is working View and Download Realistic RadioShack TRC-458 instruction manual online. Top and Bottom and face plate. New posts Search forums. 28. 2. TRC-410: 12. 5 watt output, what can i do to increase the power to 4 or 5 watts . 2K ohm resistors. dk, please send the information to mods. j Created Date: 5/26/2006 9:29:51 PM What to do with adjustments for trc-482? Realistic TRC482: {L304, L305, L306, L307, Q201} I know you can also cut d208(audio limiter) Reply. Radio Shack itself filed for chapter 11 bankruptcy in February 2015 and was acquired by General Wireless in May 2015. Click here to see the article list for TRC-485. Astatic (6 TRC-216 Mod Limiter: 27. dxRadioTech . dk. Cutlass327 (adjust to no more than 100% modulation). Pictures of the Realistic / trc-457 Search help: Support (FAQ) How to donate: Help mods. Click here to see the article list for TRC-503. Visit you will not be disappointed. 1 Fabric. com : AMC: VR207: Frequency Generation: PLL UPD858: Frequency Generation: 1. Click here to see the article list for TRC-70. TRC-492 Back. 5. Best Regards. Supports 1. 405 MHz: Channels / tuning steps: 40: Mode: AM / SSB: Frequency control: PLL (uPD2824C) Frequency I am going to examine the RF gain and TX/Mod LED configuration on the Realistic ( as these "features" didn't come on the 21x) and copy it/mod it over to the Cobra 21x (which has the mic gain "feature" that the TRC-452 lacks ). With a volt meter locate Click here to write a new message or comment for TRC-70 Note that the message is not related to any article. And when you click on the file or icon it will count as a download. The Cobra 21X and Realistic TRC-452 use the same style of circuit board/pll can layout. If you prefer to be anonymous write it in the message. Title: realistic_trc_452_sm_ex_view_pg Created Date: 5/26/2006 10:15:35 PM Step 4, now you can use mods. Behind the face plate find the clarifier control potentiometer. Feb 27, 2016 6 0 1 70. The radio was similar to the one it replaced, the TRC-434 except that the 434 had a number pad and up/down buttons for selecting your channel. 965-27. The TRC-449 was my favorite all-time sideband (SSB) radio and the TRC-452 (the very first 40 channel CB Re: Installing a Realistic TRC-452 Post by stealth1290 » Saturday, 18 July 2009, 20:40 PM Well, the first step would be, if it's a junky antenna he might consider buying a Wilson 1k (at the very least), or if he's got a tight budget then a mount and 102" whip from rat shack (get it all together for around 40 bucks). Thread starter Thomas Lee; Start date Aug 16, 2020; Thomas Lee Member Realistic TRC-456 "CB-Fone 40" (21-1523) SPECIFICATIONS. 766 Kbytes: TRC-453 Service manual. 2635 downloads. TIPS: Radio Modifications. Do you have any tricks, modifications or constructions for homebrewed equipment that are not on mods. Valdes R. Here is the website where I'm getting the mod info from. Realistic TRC-452 (21-1521) Documentation Project CBTricks. 38. TECH CENTRAL: MANUALS, TIPS, SCHEMATICS, AND MODS; ↳ Radio Mods, Tips, & Secrets; EXPERIMENTATION STATION : TAKING CB BEYOND CB; ↳ >>> HIGH FIDELITY AUDIO Q and A <<< POST QUESTIONS AND COMMENTS HERE! ↳ rx and tx mods; The Merchant's Mall: LINKS FOR REFERENCE ONLY; ↳ MERCHANT'S MALL GUIDE (Read TRC-452 CB TRANSCEIVER Catalog Number: 21-1521 VOLUME SQUELCH CUSTOM MANUFACTURED FOR RADIO SHACK BA DIVISION OF TANDY CORPORATION . {V LEW) 205k rrtectre at eerecantecicce ce ee MAIN. If you want more access, see the donate pages. The unit will now work on channels 40 to 53 using 20 to 33 on the selector and 15 channels below 1 Realistic TRC-452 (21-1521) Documentation Project CBTricks. 2uF 16V or higher TRC-448 : VR5 (ssb)VR204: TRC-449 : VR7 (ssb)CT7: TRC-450: Cut D42 or TR32: VR6,(ssb)VR7 : TRC-451: VR5 or TR27: VR10,(ssb)VR6: TRC-452: VR207: L211, L212,L214 ; MOD Meter: RF Meter: AM S- Meter: SSB S- Meter: AM Squelch: SSB Squelch: USB Freq: LSB Freq: AM Freq: TX Freq: Radio Model-- TRC 452: VR5: VR6: VR10-VR7: VR1 TECH CENTRAL: MANUALS, TIPS, SCHEMATICS, AND MODS; ↳ Radio Mods, Tips, & Secrets; EXPERIMENTATION STATION : TAKING CB BEYOND CB; ↳ >>> HIGH VCO Broadband modification: TRC-453 and Uniden PC-122 (PB-062) 1) Replace C72 (47pF) with a 0. This a free member shipment where you can view all pages, but you are only allowed to view 1 article and message daily and download 1 manual for every 4 days. TABLE OF CONTENTS OAN DO FP WN = 2) O Cc 10. There are modifications floating around that give step by step instructions on how to program the microprocessor to expand it's frequency range all microphone: wiring code: Standard: 1-Audio,2-Shield,3-Receive,4- Switching,5-Transmit: Astatic: 1-White,2-Shield,3-Black,4-Blue, 5-Red-Yellow-N/C: Turner TRC-492 mods remove D11 for audio As for power, I think you can figure that out. dk: About mods. This site is for HAMs there want all the best from his radioamateur equipment. Most radios power supplies and mod transformers can not even hit 100% well without severe distortion, ie splatter. 4. SuperSwing Mod for the TRC 453, TRC 465 and Uniden PC122. A page which shows how to modify the uniden AR 144,PC 122,Pro 810E,TRC 453,Cobra 146 GTL. W Search help If you have trouble when you are using mods. COM - THE WORLDWIDE PIRATES OF DX! by Goldfinger » Sun Apr 10, 2022 6:31 pm. Cobra 146 GTL Realistic TRC-453 Uniden PC-122 & AR-144 Uniden Pro -810e Base PC122XL. 29. Obtain a 3PDT center off switch and wire it as shown in Figure B. Modifications. 3 on Modrinth. zip: 2. Solder a 3300ohm resistor across each cut as also shown in Figure A. The Realistic brand was produced by Radio Shack, a division of Tandy Corporation, between 1967 and 2000. Cut the The TRC-152 and TRC-452 look the same as the 52 and are PLL synthesis 23 and 40 channel versions of the Cobra 77X. 001µF. BOARD: (BO T This page lists the adjustments for the Realistic range of CB radio's Realistic TRC-422A Owner’s Manual Liability of damages to any equipment is the sole responsibility of the user! Downloading, viewing, or using any information provided on these pages automatically accepts the user to the terms of this agreement! Modifications are provided for information purposes only! Download No Lag TickRateChanger 0. The TRC-465 and 453 are the same radio. Actually I did it to My 453. 17. 234 Remove the radio's covers. Receive: Change C224, 229, 232 to a 2. Published on Dec 10, 2021. dk, then look at the support pages. dxGallery. 2uF 16V or higher Electrolytic, observe polarity TX: Change C277 to a 2. Astatic (4 wire) 1- Shield 2- N/C 3- Red 4- White 5- Black. The TRC-492 like most Realistic radios of the 80’s and Realistic TRC-452 (21-1521) Documentation Project CBTricks. The TRC-465 Modify your amateur radio to get better performance, or more functions. TRC-218 / TRC-219 / TRC-474 Tune Up: 26. 17–1. Note that there is a limit to the number of files you can download. GENERAL: Type: Citizen band transceiver: Frequency range: 26. I found this to make a real difference without going nuts and defeating the limiting circuits. If you have some stuff that not is listed here you can donate this by contact mods. TRC-451 Frequency Expansion, Clarifier, Tune Up, Block Diagram, Phase Lock Loop Info: I am not looking to do a NPC mod on this, but I would like some expert advice at how to go at this somewhere in the audio section. 2uF 16V or higher Electrolytic, observe polarity Pictured below is a Courier Royale, Lafayette HE-20d, Realistic TRC-449, Realistic 452 and an Astatic Night Eagle D-104. Mic Wiring. H. A friend gave it to me "for parts", but I just cant scrap a workin radio lol I found this to make a real difference without going nuts and defeating the limiting circuits. handyman-56 New Member. This mod also works on the TRC-453 mobile rig too. . Reliable as all get out. dxForums. I never have had to open it up until a storm ripped the power lines off of my house. Post reply Click here to write a new message or comment for TRC-485 Note that the message is not related to any article. 405 MHz: Channels / tuning steps: 40: Mode: AM: Frequency control: PLL (uPD861) Frequency HiFI mod for Realistic TRC-452. Reply. zip: 1. A trc-452. Remove the unit from is cabinet and unsolder the PLL unit from the circuit board. TRC-492 Front. Depending on how long it takes for the radio to ship to me, I will eventually come back and post my results. 1. Remove Q27 (located UNDER mic socket) The modifications to enhance the modulation are easy to do. Post by Goldfinger » Sun Apr 10, 2022 6:31 pm. Adjust AMC pot for 100% modulation, around 85% when just talking loud into the mic. Change C282 to a 2. And since the cat is already out of the bag, the TRC-427 is indeed a Cobra 25. Replace R-151 and R-152 to 8. 8) cs m n md a = '?) < = el 72) MAIN -BOARD=(TOP. 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