[Amps] HT41

Peter Voelpel df3kv at t-online.de
Tue Nov 4 13:18:14 EST 2008


I converted one to a pair of  highµ connected 4-125A/QB3-300 35 years ago,
worked very well.
The most difficult part was to make the socket holes larger, it´s a very
massive chassis.
I converted the power supply to solid state full wave bridge rectification
later as well which made the tubes real hot.
When I gave it to a school station some years later I put it back to normal
2-way rectifier, just rewired the diodes and transformer for that.
It is still in use, now at the club station of the Nixdorf museum at
Paderborn, still doing 600W with the same old tubes.

73
Peter

-----Original Message-----
From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
Behalf Of n1wr at chesapeake.net
Sent: Dienstag, 4. November 2008 18:17
To: amps at contesting.com
Subject: Re: [Amps] HT41

Carl:  The HT-41 can be modified to take two 572B's.  A few minor changes
- biggest is the tube sockets need to be changed.

Wayne N1WR

>Date: Mon, 3 Nov 2008 18:27:39 -0500
>From: "Carl" <km1h at jeremy.mv.com>
>Subject: [Amps] Tube substitute in a Hallicrafters HT-41?

>A friend has a dead amp and the 7094's are almost unobtanium. Has 
>anyone done a swap?

>Carl
>KM1H

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