[AMRadio] Alpha Amp on AM

Don Cunningham donc at martineer.net
Fri Jan 27 07:43:30 EST 2012


I did approach Alpha as to whether their "key down, legal limit, no time 
limit" policy for warranty extended to the Alpha 8410 (pair of reworked 
4CX1000A's) and was assured that it would be fine.  I was told to load it 
for 375W or less carrier to stay legal and "let 'er rip".  This was assuming 
a decent antenna and proper tuning, but no other stipulations by them.  The 
tube they use is NOT actually the same specs as the old 4CX1000A, with 
higher grid dissipation, so that may account for some of it, and theres a 
LOT of beef in the power supply.

After all this discussion, I may only do this with a low power DX-60 when 
needed and use the Viking II and other rigs I have normally, but it's nice 
to know info when you need the extra.  A horizontal loop at 60' and quarter 
wave vertical with radials is also in the mix first, hi.
73,
Don, WB5HAK 



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