[CQ-Contest] Pre tuned Hf amps

Doug Smith W9WI w9wi at earthlink.net
Tue Sep 26 00:42:10 EDT 2006

On Mon, 2006-09-25 at 18:42, Mark Beckwith wrote:
> > One problem with the single-supply design is that a single
> > failure puts *all* bands on low power, not just one band.
> FWIW I have never heard of a contest failure in a station that uses one 
> humongous HV supply and separate finals.  I think those supplies are 
> generally way over-built.

I'm sure they are indeed quite reliable.  *Some* things will happen to
even the best-built supply.  BC stations usually address this with a
combination of redundancy and conservative rating of components, and
that's not a bad path to follow for the serious amateur station.  
> > if you have a failure on one supply/band you can use an
> > off-the-shelf commercial amp to fill in.
> I always wondered why some of those stations had L4Bs and SB220s between the 
> rig and the final.  Now I understand....

I hope I'm misunderstanding this paragraph, or that my sarcasm filter is
Doug Smith W9WI
Pleasant View (Nashville), TN  EM66

More information about the CQ-Contest mailing list