[Elecraft] K2 birdie at 28.265 MHz

[Geoffrey Mackenzie-Kennedy]

Michael,

My K2 has a birdie a few kHz higher which is caused by one of the receiver's 
spurious responses hearing the second harmonic of the KPA's HV bias 
oscillator, which in my KPA100 runs at 16.289 MHz. In my case the bias 
oscillator's harmonic gets to the receiver via the loudspeaker cable and the 
ribbon cable.  What is the frequency of your KPA100's bias oscillator?

73,
Geoff
GM4ESD

----- Original Message ----- 
From: <N2ZDB at aol.com>
To: <elecraft at mailman.qth.net>
Sent: Saturday, July 16, 2005 3:59 PM
Subject: [Elecraft] K2 birdie at 28.265 MHz


> Does anyone know what causes this one. I have just about every option
> installed including the KPA100. Would like to get rid of it if possible 
> (S5 on  the
> meter with a 1KHz tone).
>
> Thanks,
>
> MIchael