[Elecraft] K3 in a cw pileup - needs work

[Bill W4ZV]

"High isolation headphones" below means ~30 dB isolation from ambient noise. 
Heil does not make any in this range and most active noise reduction
headphones (e.g. Bose) only have 10-15 dB.  Here are some examples of what
Barry meant:

http://www.extremeheadphones.com/ex-29.html
http://www.sennheiserusa.com/private_headphones_dj-headphones_004974
http://www.etymotic.com/ephp/er6.aspx

These are all available in the $75-100 range.

73,  Bill


Doug Turnbull wrote:
> 
> Barry, Sorry but what do you mean by 'high isolation headphones'.   Would
> the Heil Pro-Set Plus do?
>                  73 Doug EI2CN
> 
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Barry N1EU
> Sent: 07 February 2010 01:01
> To: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] K3 in a cw pileup - needs work
> 
> 
> 
> Barry N1EU wrote:
>> 
>> You need to maximize your rf/af dynamic range - that is what is going to
>> turn that mush into a beautiful symphony of distinct signals of varying
>> levels.  What has worked well for me is AGC off (although AGC on works
>> fine as well), high isolation headphones, and the gain throttling
>> techniques (most important) described by K3NA, W4ZV, myself, and others.
>> 
> Just to continue from previous post - I experienced only mush in pileup
> reception until fully adopting this technique.  High isolation headphones
> are critical because you want to set gain such that weak signals are
> lightly
> heard but clearly copiable.  You're maximizing the receive dynamic range
> delivered to your ears and the high isolation means you can clearly hear
> fainter signals without turning up the gain and squashing the dynamic
> range
> (and too frequently engaging AF Limiter with AGC Off).  
> 
> 73,
> Barry N1EU
> 
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