[Central-Electronics] 100V alignment?

Robert Nickels ranickel at comcast.net
Thu Mar 24 16:58:31 EDT 2011


I've been working to get my Central Electronics gear running 100% and 
wonder if anyone has attempted  to touch-up the alignment of the 100V?

I'm getting 100 watts out on 80 and 20 meters, but only 50 watts or so 
on 10, 15, and 40 meters. This falls short of my expectations,  but am 
not sure it's worth the risk of messing up the broadband couplers to try 
to improve those bands, especially in the absence of a detailed 
procedure for doing so.   All tubes check good and to my knowledge the 
alignment has not been touched (including the mixer adjustments).

Also, I'd like to note my appreciation for the suggestions I found in 
the Archives and in the Electric Radio articles.  I've done most of the 
obvious things (replaced the modulator caps, re-did the clipper diodes, 
etc) and also K3ICH's work-around for a leaky silver mica I found in the 
PS-2 module that was at the heart of my sideband suppression issues.  I 
never would have thought a capacitor could develop so much leakage and 
still be within spec, but the fix is simple and effective.

I'll be appreciative of any guidance on this fine transmitter from those 
who have been there, done that!

73, Bob W9RAN


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