[Elecraft] K3. S/No:4250

[Bill W4ZV]

I agree with Arie's comments below.  Even if your filters were not factory
matched for identical offsets, you can simply set both to the average...e.g. 
for -0.75 and -0.81 set both to -0.78.  You would never notice a 30 Hz
difference in the total 2700 Hz BW of stock 5-pole filters.

73,  Bill

< author="Arie Kleingeld PA3A-2">
Eric,

The woosh you describe happens here when I use filters with different IF 
offsets.
I trust that you use filters with the same offset.
Maybe one of the offsets has changed? You can check this easily with the 
K3 utilty program.
Look at the configuration tab onder 'configure crystal filters'.

If you use the diversity setting and you still hear the woosh, this is 
the thing I would check.

73
Arie PA3A

Op 2-1-2012 7:17, Eric Buggee; VK3AX schreef:
> Hi all, I have had my K3 since mid August 2010. Bought it as a kit fully
> optioned with 2nd Rx,&gen coverage BPFand a set of 8 pole filters for
> main&
> 2nd Rx.
>
> Since I have had it in use (mainly 160M) it has performed almost
> flawlessly;
> with one exception!
>
> When I engage the SUB Rx on our early morning net freq of 1859KHz I get a
> soft repetitive whoosh -whoosh sound form the stereo speakers, almost as
> if
> there were a slow BEAT between the frequency of the two receivers, this is
> audible even if there is no signal on frequency or not.  This phenomenon
> is
> NOT as pronounced if the two Rx are tuned to a frequency ending in a round
> number (say 1860KHz) but is still there and JUST tolerable!
>
>
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