[Elecraft] "Hot" K3

[Evert Bakker (PA2KW)]

Thanks Dave,

 

Easy to forget something, but both are the same, ATT=OFF, PRE=ON

 

I just tested it on all bands: same results on all bands.

 

(May be only S-meter offset if possible ?)

 

73's, Evert PA2KW

 

 

 

  _____  

From: David Gilbert [mailto:xdavid at cis-broadband.com] 
Sent: Monday, March 16, 2009 20:24
To: evert at pa2kw.com
Subject: Re: [Elecraft] "Hot" K3

 


You didn't mention ATT and PRE.  I have found that sometimes when I reset my
K3 it goes back to settings that turned one or the other on without my being
aware of it.

73,
Dave   AB7E




Evert Bakker (PA2KW) wrote: 

Hello Don,
 
I do have a similar effect except that my first and second radio is a K3
(SN-0812 and SN-2185). 
 
- Same power-supply at the same time radio's ON
- both on 50 Ohm dummy load
- same roofing filter (2.7 Kc)
- same filter gain (0 dB)
- same DSP setting (Bw = 3.0 Kc / Fctr = 1.5 Kc)
- same rx equilizers
- same AGC settings (AGC-F, THR=6, SLP=5)
- no S-meter changes (settings are factory default)
- same RF gain setting
- KRX disabled in SN-2185
- Both KANT 3 disabled and ANT 1 selected
 
Result : 2 to 3 S-units difference (+/- 15 dB) on "internal" noise
difference. This was the first test on 15 meter)
 
That's a lot. How come?
 
I can't say anything yet about the sensitivity. I will try to find someone
with a "calibrated" signal source and make conclusions. 
 
It might all be differences in gain, but first of all I have to gain
confidence... 
 
Has one of you a good suggestion a-priori?
 
73's, Evert PA2KW
 
 
 
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft at mailman.qth.net
 
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
 
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft at mailman.qth.net
 
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html