[Hallicrafters] Re: HT33B and output

[Duane Fischer, W8DBF]

Yo Mark,

LONG time, no hear on forty meters! I wish this 300 mile radius Zone Of Deaf 
would get evicted, transfered, relocated ... moved elsewhere! Maybe near the 
Ross Ice Shelf. That is, if it has not melted from Global Warming by man's 
emissions by now and is a cold puddle of water with a few dozen confused 
Seals wondering where the bus stop ice pillar melted to!

Be well old friend and I trust 'hear' you soon!


----- Original Message ----- 
From: "Mark Shaum" <k9tr at dtnspeed.net>
To: <hallicrafters at mailman.qth.net>
Sent: Friday, September 19, 2008 10:43 PM
Subject: [Hallicrafters] Re: HT33B and output


>> 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
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