[Hallicrafters] SX-9

[Mike Lopez]

Bias Battery ?

Mike N8AZC

----- Original Message ----- 
From: <TVComlGuy at aol.com>
To: <hallicrafters at mailman.qth.net>
Sent: Friday, February 23, 2007 9:46 PM
Subject: [Hallicrafters] SX-9


> Good evening to the group,
>
> I was working on an SX-9 today and  I encountered something I haven't seen
> before.  Between the volume control  and the grid of the 1st audio tube 
> there is
> a cup shaped device with a spring  metal contact.  It is shown on the
> schematic I got from Riders.  It  almost  looks like the type of cup that 
> holds a
> galena crystal in the old  crystal sets.  Can anyone tell me what this 
> is?
>
> Thanks,
> Ron
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