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Re: [Amps] Alpha 91b problem

To: Rob Atkinson <>, "" <>
Subject: Re: [Amps] Alpha 91b problem
From: gudguyham--- via Amps <>
Reply-to: "" <>
Date: Mon, 21 Nov 2022 02:33:29 +0000 (UTC)
List-post: <>
Rob, the TenTec 425 also had trouble with shorted transformers.  I must have 
replaced at least 4 transformers in the 425 power supplies.  If the customer 
was a SSB and casual CW kind of guy I would retrofit an Ameritron AL800h 
transformer in it.  That transformer cost $249.00 at the time. Worked great!  
One guy insisted on a Peter Dahl replacement , cost him $800 smackers.  I 
tested all the bad 425 transformers and each one faulted the exact same way.  
At least they were consistent.

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On Sunday, November 20, 2022, 9:07 PM, Rob Atkinson <> 

The reason Hammond is the only source is that they purchased the PW
Dahl plans for ham transformers from Jeff K8CQ.  He bought the IP from
Dahl, not the rest of the business when Peter went SK.  For a time
Jeff took orders and had MagCap in Boston actually make and ship the
iron.  But after a few years of that he sold the Dahl IP to Hammond.
That's where we are today.

The old Ten Tec in Tennessee had a similar problem with the
transformer in their Centurion 3-500 amp.  They were making their own
transformers in house.  The windings would short out and I think they
knew about it but refused to admit any defectiveness to customers.  I
had one of those amps and went through two of their transformers
before I ordered the Dahl equivalent and never had a problem after

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