View and Download Icom IC-725 service manual online. IC-725 transceiver pdf manual download.

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tableofcontents section1 specifications 1—1 section2 insideviews 2—1~2 section3 blockdiagram 3— 1 section4 circuitdescription 4_1-^7 4-1 receivercircuits 4—1 4-2transmittercircuits 4—4 4-3pllcircuits 4— 6 4-4logiccircuits 4— 7 4-5regulatorcircuits 4—7 section5 mechanicalpartsanddisassembly 5—1-7 5-1framedisassembly '. 5—1 5 …

ICOM IC-725 Service Manual - Detailed information on the IC-725 transceiver including specifications, circuit descriptions, mechanical details, adjustment procedures and board layouts.

CI-V computer control. Automatic antenna tuner. 10-160 m + WARC.

This service manual provides detailed information for the IC-725 HF All Band Transceiver. It includes specifications, inside views, block diagrams, circuit descriptions, mechanical part breakdowns, adjustment procedures, board layouts, parts lists, and voltage diagrams.

Manuals and User Guides for Icom IC-725 Amateur HF Transceiver. We have 8 Icom IC-725 Amateur HF Transceiver manuals available for free PDF download: Service Manual, Instruction Manual

Nov 22, 2020 · The Arduino monitors the IC-725 "mode" signals and, depending upon their state, programs the Si5351A to generate the appropriate BFO frequency. The Si5351A came pre-assembled on a small PCB. I replaced its "stock" 25 MHz crystal a 25 MHz TCXO to improve frequency stability over temperature.

Icom is an outstanding, comprehensive radio manufacturer that produces radio communication equipment of all genres, from amateur radios to terrestrial, marine and avionics radios, as well as LTE, WLAN and satellite radios.

The 1 st mixer circuit employs a balanced mixer using lownoise junction FETs (2SK125 x 2) to expand the dynamic range. The 1st LO signal (70.9515-100.4515 MHz) enters the MAIN UNIT from the PLL UNIT via J5.