[Hammarlund] Part # of Hammond chokes /recapping questions for SP-600

[David Wise]

Has anyone tried de-potting one?  (Then add insulation.)

Dave Wise 

-----Original Message-----
From: hammarlund-bounces at mailman.qth.net [mailto:hammarlund-bounces at mailman.qth.net] On Behalf Of Roy Morgan
Sent: Tuesday, March 09, 2010 7:42 PM
To: Hammarlund Mail List
Subject: Re: [Hammarlund] Part # of Hammond chokes /recapping questions for SP-600


On Mar 9, 2010, at 9:43 PM, Singley, Rodger wrote:

> Some of the SP-600 receivers were built with chokes that apparently  
> have contaminated potting tar which becomes conductive over  
> time. ... With the leads disconnected you will measure leakage from  
> the terminals to the case and this leakage goes up with  
> temperature.  I considered insulating mine from ground

<Diatribe Mode ON>

Roger and others,

This leaky choke problem was addressed in a Hollow State News article  
quite some time ago. Unfortunately, the "fix" they suggested was to  
insulate the case from the chassis and continue to use the defective  
choke

DO  NOT DO THIS.