[Elecraft] What crystal filter do you use the most?

[Keith Onishi]

I have 3 roofing filters, 400Hz for CW and digital, 2.8kHz for SSB and 13kHz for listening to broadcast stations. But I should have selected 500Hz 5-pole and 2.7kHz 5-pole instead of 400Hz and 2.8kHz. I have very strong local power line noise, often S3 to S5 level. Steep filter like 8-pole filters sometimes internally worsen the noise level and cause less S/N to weak signals. When I need to use GRITTY for very weak DX RTTY signal, I have to widen the passband to more than 500Hz for better S/N.

73 de JH3SIF, Keith

> 2015/09/28 23:57、dw <bw_dw at fastmail.fm> のメール：
> 
> Hello gang,
> Just ordered my first K3.
> I haven't ordered any filters or accessories yet.
> Want to wait and see what I really will need.
> 
> I'd like to illicit your experience with the use of crystal filters for
> CW.
> What filter do you find you use the most and why?
> I won't be using the K3 for contesting....just casual CW-only DXing and
> occasional rag-chews.
> Of late, I've really enjoyed getting on 40m and 30m at sunrise.
> 
> Many thanks in advance
> N1BBR :-]
> 
> -- 
> Bw_dw at fastmail.net
> 
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