I'm setting up to record contests using an SB-16 sound card and Recall Pro
software. At the moment I'm dealing with a severe RFI problem, which
crashes the Recall software a few seconds into every transmission. I've
determined that it is definitely coming in the [line in] cable from my
radio's external AF output, because when I disconnect that line from the
computer the program doesn't crash no matter how long I transmit. I've
grounded the computer case and wound a number of turns of the [line in]
cable around ferrite toroid cores, all without apparent benefit. Would it
make sense to try .01 disc caps bypassing the conductors in the [line in]
cable to the shield, in case this is differential mode interference rather
than common mode, as I'd assumed?
73, Pete N4ZR
Check out the World HF
Contest Station Database at
www.pvrc.org
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