[Hallicrafters] HT-32B

[Roy Morgan]

On Jun 22, 2014, at 10:58 PM, Jack Schrader <w1jhs at myfairpoint.net> wrote:

> First thing you need to do is solid state both of the rectifier tubes!!! Hopefully you have not shorted the xfmr already. Do not apply any voltage to that transformer with the tube rectifiers in place or you will shortly have a blown transformer.

Jack,

It sounds from what you say that it is the tube rectifiers that cause shorted transformers.

Can you tell us more about why and what happens?  How do the tube rectifiers cause shorts in the transformer, and where do the shorts show up?

> Give me you telephone no. and I will call you with more info.

The list members and I would appreciate hearing about the “more to do”.  Thanks in advance for posting it to the list.

Mike reports this:

>  Switching to MOX and gradually applying rf while peaking drive and final tune, I get about 10 watts out at 800 volts with plate current measuring about 200 ma. The plate current at this point starts to rise slowly but accelerates rapidly.

Have you got some ideas as to why this is happening?

Roy

Roy Morgan
RoyMorgan at alum.mit.edu
K1LKY Since 1958