[Hallicrafters] Re: HT33B and output

[Mark Shaum]

> From: Glen Zook <gzook at yahoo.com>
> Subject: Re: [Hallicrafters] Hallicrafters HT-33A

On my 33A, the best of my three used PL-172's would manage about 900 to 1000 
peak watts output, measured on 40 meters as I recall.  I picked up a NOS 
8295A and that output jumped up to 1200 watts.  If you want to maximize the 
potential of the amp you will need to add some positive suppressor grid 
voltage.  I kludged in a bypass capacitor ring and with 75 volts on the 
suppressor grid output went easily over 1500 watts with no other changes. 
The tube manuals will indicate the recommended suppressor grid voltage.  I 
returned mine to ground as I didn't want to overstress anything else in this 
fine hernia generator of an amp.  And you better have a stiff 120V supply, 
with the added output I was popping the internal 22 amp breaker on CW tests.

Mark K9TR