I just about went crazy finding this one last night. I've got two K3's @ N3HBX running 2.67 and 2.73 and both have the same problem. Setup is Data/AFSK A and 2125/170.
With the K3's RTTY decoder function enabled so it displays running text on the front panel, intermittent distortion is introduced into the TX AFSK audio, usually when set above a certain level. Actually, one of them had it at any level and the other would only kick in once the input level reached a certain level. With the decoder turned off, it does not exist at all. To describe the noise, it's like a high-frequency burping or buzzing noise.
See also unflat audio response in separate message.
Suggestions or confirmations?
Ty K3MM
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