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mods.dk -> ICOM -> IC-703 -> Distorted audio when using ...
https://www.mods.dk/view.php?ArticleKey=01b36d0eae3771391455661b45834805
I did find a problem with the first 703 I bought where everytime I used an external speaker it sounded awful no matter how many different ones I tried. I took t Search help: Support (FAQ) ... ic-575: ic-701: ic-703: ic-705: ic-706: ic-706mkii: ic-706mkiig: ic-707: ic-718: ic-720: ic-725: ic-728: ic-729: ic-730: ic-735: ic-736: ic-737: ic-738 ...
IC-703 Service manual - g3ejs.com
http://g3ejs.com/files/icomfiles/IC-703_Service_manual_part1(A4).pdf
The preamplifier circuit in the IC-703 has approx. 15dB gain over a wide-band frequency range. When the preamplifier is turned ON, the signals from the RF circuit are applied to the preamplifier (Q651) via D622 or D632. Amplified or bypassed (passes through the D601 and D602 when bypassed) signals are applied to the 1st mixer circuit (D701).
IC-703 Service manual - QSL.net
https://www.qsl.net/sp9hzx/pdf1/IC703_service%20manual.pdf
The preamplifier circuit in the IC-703 has approx. 15dB gain over a wide-band frequency range. When the preamplifier is turned ON, the signals from the RF circuit are applied to the preamplifier (Q651) via D622 or D632. Amplified or bypassed (passes through the D601 and D602 when bypassed) signals are applied to the 1st mixer circuit (D701).
mods.dk - Articles for Icom 'IC-703'
https://www.mods.dk/index.php?ModelId=274
Mic modification for IC-703 (706) 08 Apr 2007: Distorted audio when using the rear external speaker socket: 28 Jun 2006: ICOM IC-703 Voltage check tips: 25 Feb 2006: IC-703 MW And LW Attenuator Removal Mod: 25 Feb 2006: IC-703 AGC slow release: 24 Feb 2006: AM Filter replacement for IC-703: 12 Feb 2005: Icom IC-703 TX key update: 12 Feb 2005 ...
i703
https://www.ab4oj.com/icom/ic703/ic703.pdf
the IC-703 is designed for maximum effi-ciency at 9.6V DC. When using the optional BP-228 battery pack, the IC-703 automati-cally switches into low current mode, thus allowing operation time of up to 7 hours*. While operating on high power, or 13.8V DC, the IC-703 can safely operate at a full 10W even if the power source drops to 11V DC.
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