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[TenTec] Re(Ten Tec) In praise of older technology

To: tentec <tentec@contesting.com>
Subject: [TenTec] Re(Ten Tec) In praise of older technology
From: JAMES HANLON <knjhanlon@msn.com>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Sun, 2 Mar 2014 10:38:29 -0700
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
On the question of tuning for Dip versus tuning for maximum output, let me 
offer a few words of, I hope, wisdom.
 
First, the additional amount of power output that might be obtained by 
operating the rig "off dip" is so little that it will make absolutely no 
difference at the receiving end.
 
Second, you are very likely increasing the total amount of power dissipated in 
the final amplifier tubes by operating "off dip," and you are pulling more 
current from the tube cathodes as well.  Both will contribute to degrading the 
amplifier tubes' life.  Considering what replacement tubes cost these days, you 
probably don't want to shorten the life of your existing tubes in order to get 
a few watts more output from them. 
 
You would probably be better advised to run the amplifier at somewhat less than 
full, ICAS class C ratings, that is to back off the fully loaded plate current 
a bit.  You would lose at most one or two dB on the other fellow's S-meter, and 
you would add considerably to the life of your tubes.    
 
Jim Hanlon, W8KGI
                                          
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