[Boatanchors] Thoughts on Reviving the Heathkit DX-100

[Glen Zook]

Starting just after World War II, the 1625 was definitely run at higher plate voltages than the ratings.  Like the 6146, the 1625 can handle considerably more plate voltage than the 750-volt specifications.

It has been my experience that the DX-100 is not a "weak sister" and that it can take a lot of abuse. 

The Hallicrafters HT-32- series, the HT-37, and the Collins 32V- series all have a serious power transformer problem with the rectifier filament windings tend to short out within the transformer.  Those transmitters really need the high voltage rectifiers changed to solid-state and the rectifier filament windings completely disconnected or used as "bucking" windings to reduce the primary voltage on the transformer.  But, such is not the case with the DX-100 or with the TX-1 Apache which uses the same power transformers.
 Glen, K9STH 

Website: http://k9sth.net
 

      From: David Stinson <arc5 at ix.netcom.com>
 To: boatanchors at mailman.qth.net 
 Sent: Wednesday, January 6, 2016 2:57 PM
 Subject: Re: [Boatanchors] Thoughts on Reviving the Heathkit DX-100
   

----- Original Message ----- 
From: "Glen Zook" <gzook at yahoo.com>
Subject: Re: [Boatanchors] Thoughts on Reviving the Heathkit 
DX-100

The 6146s are just one stage.
The 1625s are not speced for 820 Volts, nor are the stages
served by the LV rectifier happy with the high primary.