[Boatanchors] ballast tube maybe?

[Richard Knoppow]

----- Original Message ----- 
From: "Gerry Steffens" <gsteffens at pitel.net>
To: <boatanchors at mailman.qth.net>
Sent: Tuesday, May 03, 2011 8:11 PM
Subject: [Boatanchors] ballast tube maybe?


>
> In going through boxes of tubes I have come across several 
> tube-like devices
> that look like tall metal tubes with octal bases.  I 
> suspect they are
> ballast tubes.  Each is stamped with a notation 10A.  They 
> are physically
> lighter in weight than similar sized tubes.
>
> Any thoughts on what they are?
>
> Gerry
>
     Are there any other markings on them? It sounds like a 
ballast or resistor tube. They were made by Clarostat, 
Knight, JFD, and others. These are power reistors for line 
dropping rather than regulators like the Amperite tubes. 
There were common in many AC/DC sets including radio, TV, 
intercom, etc.
     Triad made transformers but might have made resistor 
tubes too although I can't find any sign of them in old 
catalogues.


--
Richard Knoppow
Los Angeles
WB6KBL
dickburk at ix.netcom.com