On 6/8/2013 1:18 PM, Carl wrote:
None of these radios have hum problems
Repeat after me -- Pin One Problems are the most common cause of RFI.
The FT1000MP has a Pin One Problem at its mic input that causes RF
feedback on 15M and 75M. I confirmed this by driving it with an HP RF
generator, using the method described in the AES Paper. I killed the RF
feedback with a common mode choke on the mic cable, which killed the
antenna current. I have no experience with the other radios.
73, Jim K9YC
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