[Elecraft] K1 Audio Problem after fitting KNB1 Noise Blanker

[Ray Spreadbury]

Thank you Don & Mike for your suggestions!
Yes, I had somehow accidentally moved S2 into the TEST position when removing C2.
Putting it back into the OPER position cured the problem
I feel a bit of a fool but thanks both for helping out
73
Ray, G3XLG

-----Original Message-----
From: Mike Morrow [mailto:kk5f at earthlink.net] 
Sent: 11 January 2012 02:11
To: Ray Spreadbury; don at w3fpr.com
Cc: Elecraft at mailman.qth.net
Subject: Re: [Elecraft] K1 Audio Problem after fitting KNB1 Noise Blanker

Ray wrote:

> The "whine" is a steady continuous tone (perhaps at 800 or 900 cycles), not
> popping, nor a low pitched oscillation and in fact I wondered if the
> sidetone spot was on or if the key was down.

Have you checked that the small slide switch S2 for for the OFFSET TEST adjustment
(on bottom of the RF board) didn't get inadvertently placed in the TEST position
rather than the OPER position?

I'd check that before anything else.

73,
Mike / KK5F