Posted by
Cookie on
Mar 13, 2012; 6:24pm
URL: http://elecraft.85.s1.nabble.com/KX3-and-Data-modes-tp7369142p7369471.html
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 <
[hidden email]>
To:
[hidden email]
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
EME: 50-1.1kw?, 144-1.4kw, 432-QRT, 1296-?, 3400-?
DUBUS Magazine USA Rep
[hidden email]
"Kits made by KL7UW"
http://www.kl7uw.com/kits.htm======================================
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