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Re: [Amps] Henry 3K-A choke failure...workaround?

Subject: Re: [Amps] Henry 3K-A choke failure...workaround?
From: Martin Sole <>
Date: Fri, 27 Sep 2019 09:27:39 +0700
List-post: <>
If the amp was stored in damp conditions it is possible that moisture may be the culprit. You could try baking the choke in a low oven for a good period of time (?). That would be sure to expel any moisture. Failing that and with a rewind or replacement not possible then insulating it well from ground might be a reasonable work around. I would however be sure to label clearly inside the psu compartment what you have done. You might well remember but who knows where it ends up in the future. I have a friend who did that with the plate transformer in a Henry and it worked well.

You can use paxolin, perspex, pretty much anything you can get I guess but do label it!

Martin, HS0ZED

On 27/09/2019 09:07, jeff millar wrote:
Hello wise ones...

Bought a nice 3K-A at a flea market and made one SSB contact.  On the
second contact it tripped off on HV overcurrent.  After some debugging, the
Plate choke is leaky to ground at HV but open with an Ohm meter.

Can I just put the choke up on insulated standoffs?

Any other suggestions?


jeff, wa1hco
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