[Elecraft] K3 Tuning encoder pulses and birdie problem

[Erik N Basilier]

I can just barely hear the birdie on a dummy load around 28005, but it is so 
weak that it is not a problem.

When a real antenna (beam or vertical) is connected, the encoder pulses is 
no problem at my rather noisy QTH. At 1kHz bandwidth the S-meter indicates 
S3 with AGC on, and the encoder pulses cannot be heard.

On a dummy load, the encoder pulses are very audible at 1 kHz bandwidth.
I have the 500 Hz and 200 Hz filters, currently activated at 550 Hz and 250 
Hz (the frequencies closest to the real bandwidths of those filters), which 
causes the steps in selectivity to be more significant at those particular 
frequencies. That said, when I go from 300 Hz to 250 Hz (the 200 Hz filter 
kicks in) the encoder pulses go from very audible to inaudible. 
Subjectively, on a dummy load with AGC off, they don't sound louder with 
preamp on, maybe because the general noise partly masks them when the preamp 
is on. I would describe the sound of the encoder pulses as "running a 
fingernail across the teeth of a comb". On the S-meter, with the preamp off, 
the pulses are too weak to show up at all. With the preamp on, the pulses 
cause the first S-meter segment to flash.

73,
Erik K7TV

----- Original Message ----- 
From: "David Gilbert" <xdavid at cis-broadband.com>
Cc: "Elecraft Reflector" <elecraft at mailman.qth.net>
Sent: Wednesday, March 25, 2009 7:43 AM
Subject: Re: [Elecraft] K3 Tuning encoder pulses and birdie problem


>
> Agreed.  I usually operate CW with a pretty narrow bandwidth (200 Hz)
> and at first I didn't even hear the pulses on CW.  That's why I went
> back and set both CW and SSB to the same bandwidth (1000 Hz) to check,
> and that made both modes sound the same.
>
> As I said to Jan, the issue may be worse on his rig, but on my K3 the
> stuff on 28005 is not a problem even for weak signal work.
>
> 73,
> Dave   AB7E
>
>
>
> Wes Stewart wrote:
>> They are of course, worse with wider bandwidth, since there are more of 
>> them to hear at once.
>>
>> Wes
>>
>>
>>
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