[Elecraft] K3 - beautiful audio!

[Brian Alsop]

I agree with you Bill about the noise-- and my hearing drops off lots at 
the higher frequencies.

I can't imagine listening to it very long with good hearing.

I have a Timewave DSP-599ZX audio DSP filter here.  The high and low 
cuts are independently adjustable.
It has a range from  100Hz to 5KHZ.  The optimum settings I find here 
for normal crowded band SSB condx are low cut =300 Hz and high cut 
=2200Hz.  (This is an IC-706 with totally unknown audio response 
characteristics).    The fact, that the upper cut is well inside the 
passband of the SSB filter indicates, the higher freq stuff isn't adding 
anything for me.   It also indicates, I won't be unhappy that the K3 
currently cuts off at 300Hz.   (Earphones always used here.  Haven't a 
clue about these cut points for speakers)   I'll be anxious do the same 
playing around with the K3 when it shows.   I've ordered a 1.8KHz 
filter.   These results seem to indicate it may not be "too narrow".

Then again, I'm interested in intelligibility, not fidelity (given my 
ears of course).

I'm really wondering under what conditions one would want to use such a 
wide filter on for SSB.  Perhaps 10M or 6M  or dead band local 
communications?  All the adjacent signals would seem to be really 
bothersome under normal condx and wipe out any benefits.  Just curious.
Not interested in generating flak. (Perhaps the PSK crowd who are 
interested in decoding multiple signals simultaneously would find it 
useful.)

73 de Brian/K3KO



Bill W5WVO wrote:

> Don Rasmussen wrote:
>
>> You won't know how beautiful the -receive- audio is on
>> SSB until you have the FM filter installed listen
>> here: http://tinyurl.com/3a366j
>
>
> Hmmm... Listened to the audio clip, with the K3 apparently being 
> switched back and forth between the FM filter and the SSB filter... 
> and I personally like the narrow-band "communications grade" sound 
> better than the wide-band sound, with all that high-frequency hiss. 
> Matter of preference, I'm sure. :-) Either way, it sounds great. 
> Should be another month, and I'll have mine, just in time for 6m Es 
> season, I hope.
>
> Bill W5WVO
>
>
> _______________________________________________
> Elecraft mailing list
> Post to: Elecraft at mailman.qth.net
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft   
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>