public:radio:radio_database:ic-7200
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Table of Contents
IC-7200
Rugged HF/50MHz
Background
- From the Silent Key equipment of Peter GM0CXQ
- Obtained 01/06/23
Repairs & Modifications
HM36 Microphone Mod
- The current HM-36 microphone supplied with IC-7200 is poorly designed and problems are well documented on the internet.
- I carried out the “K1RF/PY3SS Modification” documented here : k1rf_modified_py3ss_hm-36_mic_mod_reva.pdf
- The newly modified HM-36 now functions “correctly” with adequate drive for the radio, and a better frequency response.
- It is now possible to set Mic Gain < 20 and Compression = 4 and obtain adequate ALC and full power out and a reasonable degree of compression without the need to “Close Talk” the microphone.
- It is also now possible to obtain full power out, and some ALC deflection, without use of Compression, by adjusting the Mic Gain accordingly. This was difficult/impossible with the stock HM-36
— John Pumford-Green 02/06/23 08:04
Further Information
public/radio/radio_database/ic-7200.1685693739.txt.gz · Last modified: 06/03/25 06:49 GMT (external edit)