Mac,
Ask the person realizing the repair to check Q42 and Q43 (RN2425) in the main unit. Many IC-821H presented a problem with low power, including mine. The problem is normally due to a partial damage of Q42 and/or Q43 transistors in the power control circuits (for both VHF and UHF). It is advisable to replace both transistors by a part that can tolerate higher power levels. A p-channel switching mosfet can do the job.
73, Edson PY2SDR
On Sat, Feb 10, 2018 at 10:28 PM, Mac A. Cody maccody@att.net wrote:
Hello,
A fellow ham in my radio club has an ICOM IC-821 that has developed a problem. The transmit power on 2M has dropped from its nominal 45 Watts to 18 Watts. He has already attempted to obtain service through ICOM and some other repair services without success. Is anyone aware of a repair outlet or an individual that is knowledgeable of the IC-821 in order to perform repairs?
73,
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