[Elecraft] KX3 and Data modes

[WILLIS COOKE]

How do you know that the Bird measurement is actually 11.5 watts?  The accuracy claimed by Bird for a new element is +/- 5% of full scale.  If you have a 50 watt element your reading is between 9 and 14 watts.  If you have a 100 watt element it is between 6.5 and 16.5 watts.  
 
Willis 'Cookie' Cooke 
K5EWJ & Trustee N5BPS, USS Cavalla, USS Stewart


________________________________
 From: Edward R. Cole <kl7uw at acsalaska.net>
To: Elecraft at mailman.qth.net 
Sent: Tuesday, March 13, 2012 11:59 AM
Subject: [Elecraft]  KX3 and Data modes
 
Regarding the effectivity of the KX3 on SSB, I can relate the 
effectivity of the K3/10 on SSB (equivalent RF power).  I previously 
thought I was running about 15w on 20m but with a new element for my 
Bird43 I know that is was actually 11.5w.  CW benefits from the 
effective reduction in bandwidth (50-Hz) that many top CW ops exhibit 
which offers up to 17 dB advantage.  Say you have an average of 
250-Hz and that advantage is 10-dB.  JT65 has a theoretical 30-dB 
advantage and practically one could say 26 dB.  Other narrow-band 
digital modes should offer increased performance, also.  QRSS does by 
the fact the signal is averaged over long time periods.

I have been checking into the Elecraft SSB Net fairly regularly and 
being copied by Phil, NS7P who is 1620 miles from me.  I run an old 
Hygain TH3mk4 tribander at 50-foot which helps.  Now I have a new HF 
amp which I have been running at 200w but can run up to 270w with 
11.5w drive.  That was necessary to make it last weekend during the 
solar flare.


73, Ed - KL7UW, WD2XSH/45
======================================
BP40IQ   500 KHz - 10-GHz  www.kl7uw.com
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