I have a Timewave DSP-59+ audio filter that I used with my old FT-101E.
It has switchable high and low pass cutoff frequencies or switchable
band pass filters with bandwidths from 25 Hz up to 600 Hz. I've
experimented with using it with the K3 output and mostly it doesn't
improve copy; the exception is where I get a signal tuned in the 200 Hz
K3 filter ( using 8 pole 250 Hz) filter and tune a signal that's barely
copyable. If there's not too much QRN, I can improve the apparent S/N
ratio and make the copy more pleasant but it really doesn't help the
intelligibility of the signal. Using it seems much more trouble than it
is worth. I rather doubt that adding an audio peaking filter to the K3
would really help much, if any.
The DSP-59+ also has digital noise reduction that sounds better, often
in a more pleasant manner as far as the background noise is concerned,
than Elecraft's in some cases but likewise doesn't help enough to
bother, but then I rarely use phone.
I remember when I added a Heath Q-multiplier to my S40B and later to my
HRO-50T. That was a good improvement, especially for the S40B, but then
almost anything would have been.
Dunc, W5DC
Jan Erik Holm wrote:
> Well I never found the FT1000D peak filter that great, decent yes,
> all subjective of cource.
>
> I remember when I had a Drake 2B with 2BQ Q-mult, that was nice,
> you sure could peak signals up out of nowhere.
>
> But sure a peak filter could be nice to try.
>
> Happy New Year / Jim SM2EKM
> ---------------------------------------------------
> Mike K2MK wrote:
>
>> I am also very interested in an audio peak filter for CW. I really found it
>> extremely beneficial on my FT1000D. The RX EQ has potential in this area but
>> it is turned off at narrow bandwidths.
>>
>> 73,
>> Mike K2MK
>>
>>
>> from n4cc
>>
>> Wayne -- I would like to see an audio peaking filter for cw work...perhaps
>> it could
>> be an alternate function for the pitch control??
>>
>>
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