[Amps] Alpha vs: Henry

[PACER99 at aol.com]

A number of years ago I made a good living fixing  Alpha 77's (dx) and 
Signal One's. The transformer in the Alpha is seriously  underrated for two 
tubes. Good enough for the casual operator but I can  guarantee it wouldn't make 
it through a contest. The high power mod was to  install a Peter Dahl 
transformer, replace the HV diodes to larger voltage and  current ratings and 
replace the vacuum output relay to a RJ2 Jennings. As far as  i am concerned 
the amp is junk.
 
I note the complaints about the DC voltage filter choke in the  Henry. At 
least the Henry has one and the HV regulation is much, much better  than in 
the Alpha. The resonating capacitor in the original Henry 5K, 3K ultra  and 
8K ultra was changed to a .2 mfd and that cured the humming  problem. 
 
If I remember correctly the original question was the choice  between the 
Henry 5K and the Alpha 77DX. The Henry is, by far the better  ampflier.
 
Larry
N7DD