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Re: Fw: CQ WW DX Contest CW 2011 - Unofficial claimed scores

Posted by David Gilbert on Dec 04, 2011; 6:04pm
URL: http://elecraft.85.s1.nabble.com/Fw-CQ-WW-DX-Contest-CW-2011-Unofficial-claimed-scores-tp7060148p7060699.html


Pileups with strong signals are not the problem, at least if you
optimize the AGC settings.  The K3 works quite well in those situations,
in my opinion.  It's the pileups with several low level signals that are
the problem, and I never use the noise blanker.   I don't need to since
I'm in a semi-rural location with almost zero noise.  I only use one
radio and the nearest commercial station of any sort is 20 miles away.

The problem is real.

Dave   AB7E



On 12/4/2011 8:48 AM, Mike Fatchett W0MU wrote:

> We never saw this at J6 and the pileups were huge.  Are you certain that
> the radio is not broken in some way?  G0DVJ said the K3 was very
> impressive in its ability to handle the huge pileups and crowded
> conditions. He is probably going to be purchasing one.
>
> Are you using the noise blanker by chance?  What is the build out of
> that radio.  Was this a multi transmitter operation?  If so could it be
> the other radio is trashing the K3?  We used NQN bandpass filters and
> never heard each other.  Are you close to any high power AM broadcast
> stations?  Does this happen on all bands or just some?
>
> Many times I had to crank in the filters to widths that other radios
> could not possibly handle and I worked my way back into my main pile
> picking out calls one at a time.  The audio was always crystal clear.
>
> If the K3 can't do it , no radio can.  Maybe the FTDX5000 but it is not
> a radio that can travel.  The TS-590 might if they had bothered to offer
> roofing filter options.
>
> W0MU
>
>
>
> On 12/4/11 7:11 AM, Cady, Fred wrote:
>> Neat site but unfortunately none of the audio clips demonstrate the
>> pileups heard at dx locations like C6AAW. Once again this year the K3s
>> AGC failed to perform adequately for us. I found many times I just had
>> to turn AGC off. Signals were much cleaner and more distinguishable.
>> I think there are two things going on. First, I think the threshold
>> cannot be set high enough. The maximum is around S3 according to my
>> measurements. Thus, when you have a pileup of signals all in the S3, S4,
>> S5 region, which is common, AGC is compressing them together. When AGC
>> is off, these signals are now in a linear region of the transfer curve
>> and can be distinguished more easily. Second, and this is hard for me to
>> judge since it has been a while since I've used an analog audio
>> processing radio like the TS850, the audio doesn't sound "good". I
>> dunno. I think there is an inherent harshness(?) to digitally produced
>> audio as compared to analog audio. I'm not an audio guy, for sure.
>>
>> Sadly, I suspect top contesters are beginning to look for another radio
>> to replace the K3 :-(
>>
>> 73,
>> Fred
>> KE7X/C6AKX/C6AAW
>>
>>
>> -----Original Message-----
>> From: [hidden email]
>> [mailto:[hidden email]] On Behalf Of Paul VanOveren
>> Sent: Sunday, December 04, 2011 6:16 AM
>> To: elecraft reflector
>> Subject: [Elecraft] Fw: CQ WW DX Contest CW 2011 - Unofficial claimed
>> scores
>>
>> Russian website with claimed scores from last weekend.  Very cool video
>> embedded from HI3A, with 2 K3"s prominently displayed... you can look up
>> your score in the search box, for your ranking in the World, North
>> America or just USA....
>>
>>
>> Subject: CQ WW DX Contest CW 2011 - Unofficial claimed scores
>>
>>
>> http://pileup.ru/cqww_cw.php?year=2011
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