Uniden 858 Chassis, My mainboard is a PC-176AD. First one done is the old uPD858 chassis from the late 1970's. So they updated their existing 858SSB sets which proceeded to kick ass on-the-air, and, at 1/3 of the price of the high end guys' equipment. The channel frequency at 27 MHz. The mod should also work with the uPD2824 (i. I think the PC-196 is pretty much the same. Title Service Manual President Washington (ENG) Author Apr 6, 2014 · My gut instinct tells me it's probably some variation on the uniden 858 ssb chassis. ) to select frequencies in 5kc steps rather than the standard Oct 31, 2024 · In this video I test out and repair a vintage December 1976 President Washington Radio with the Uniden uPD858 PLL. 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 May 12, 2013 · Example, the Uniden 858 chassis has 0. /e Cobra 146, President AR144). A page that shows how to modify the washington (858) radio Apr 14, 2012 · Simple modification for all CB-radios with Uniden's PC-196 board or clones. CAUTION! Connecting your radio to the wrong set of connectors could permanently damage your radio!! Presteps; Verify radio is Dec 24, 2025 · It had the Uniden uPD858 chassis and both the build quality and components were first rate. 35 x 100 = 135, so the "N" codes on that chassis go from 91 on channel 1 to 135 on channel 40. The Cobra 21X and Realistic TRC-452 use the same style of circuit board/pll can layout. Oct 4, 2015 · New expansion - UPD858 SSB chassis by lbcomms » 09 Jan 2020, 02:50 Better rather late than never - the "no SMT" expansion that will fit nearly all SSB capable radios that use a dowmixer type PLL circuit. 91 MHz on channel 1 and 1. Big video is now available. The high IF frequency at 7. Feb 15, 2015 · 8-digit LED Frequency Counter Module Model PLJ-8LED-C google it will come up with the manual if I knew ho to upload the pdf i would opps i figured how to upload hope this file helps my radio is a cobra 139 xlr with PC176AB board with d858 UNIDEN PLL CHIP same as the robyn 520D (?) Sep 28, 2012 · Uniden was the new boy on the block, so to speak, and wanted to strut their stuff. Clarifier mod is OK. The Bengal II used the 861which was odd for a sideband unit. The FCC didn't like the direction that the manufacturers were taking, and decided to rein things in. e. 858 Chassis Kit Instructions 8719-192-L-PLCC Uniden 858 KIT INSTRUCTIONS The installation of the 858 kit requires soldering. Whatever was in that /2 had to be Uniden. com. Remove X9 and X10 crystals, as shown in picture below. This will need to be done for each bank of 40 channels in the radio. I do a complete tear down and give the chassis a bath, recap and align the Jul 3, 2018 · I recently had my Uniden Madison recapped and I bought one of Mike's kits off e-bay. It works superb and the AM-mod is sounding awesome. Remove the cover from you Uniden 858 chassis radio and to make sure if this item is not already installed in your radio, before you or- der the parts! 19fHOW TO PUT YOUR YAESU FT707 ON 11 METERS "WHAT A BEAUTY" Crystal location AF BoardfFT707 (cont) 1. 35 MHz on channel 40 at the equivalent pin on the 858 chip. Get the best deals for Uniden 858 at eBay. This Modification Guide provides detailed information for upgrading and modifying Uniden 858SSB TRC449, 457, 458, 138XLR, 139XLR, Grant, Washington, Madison models. Radio must be in original condition, i. That the same path Courier took with the 40 and 40D model. Its Mar 27, 2018 · These parts are made to resonate at three basic ranges of frequency in a 40-channel or 10-meter radio. \, @C@e us 2 : ? Oct 29, 2024 · I've been doing a allot of research on the Uniden 858 chassis. The board in the 23 channel courier is also a uniden chassis and similar to the Simba. 695 MHz. IF transformers meant for the 455 kHz AM Dec 18, 2016 · Some info floating around online is meant for the 858 Chassis radios, not just any radio with a 858 PLL. When my parents offered to help me buy my first SSB rig, circa 1979, I sure wish I'd known about this rig. 0. , without channel mods. CAUTION! Connecting your radio to the wrong set of connectors could permanently damage your radio!! Presteps; Verify radio is Increase signal Adjust VR7 for X'dulation. We have a great online selection at the lowest prices with Fast & Free shipping on many items! This paper explains how to modify the popular Uniden 858SSB chassis (Cobra 138/139XLR, Realistic TRC449/457/458, etc. 91 x 100 = 91 and 1. R40 D403 D404 D401 0405 Ri15 R40 R408 R405 O TEST NO so ;aeter IC4 TRU CHASSIS-TOP TRANSCEIVER AMC-. The local-oscillator (LO) frequency at 35 MHz (Uniden) or 16 MHz (RCI). Enhance performance, reliability, and expand functionality with these detailed instructions. 8 or 10. As stated above Mike is a forum member and his kits are complete with quality parts. I was getting a little intermittent SSB relay chatter.
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