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

[Roy Morgan]

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.

It is a danger both to you and especially to any future owner of the  
radio, no matter if you label the thing and post warning signs or  
whatever.

I look forward to hearing of any Hammond part that does the job  
nicely. I'll add that info to any future brief diatribes.

<Diatribe mode OFF>

Roy
Who has three SP-600's awaiting restoration.

Roy Morgan
k1lky at earthlink.net
529 Cobb St.
Groton NY, 13073
Home: 607-898-3607
Cell: 301-928-7794