25 Apr
2005
25 Apr
'05
10:33 a.m.
Subject: Re: small valves and RE: OT
From: "Dwight K. Elvey" <dwight.elvey at amd.com>
Date: Mon, 25 Apr 2005 09:38:10 -0700 (PDT)
To: cctalk at classiccmp.org
Nope, No dial light. I opened the chassis up and traced the 1.5V.
It runs the audio output 3v5 other half of the filiment.
I suspect they did that to balance the filiment currents.
Odd but, thats the story.
Allison
From: "Allison" <ajp166 at
bellatlantic.net>
Myself as well. The design of this radio is early 50s. I have a similar
circuits from the 1960 RCA tube manual that require only A and B(HT) voltages.
However this radio had a battery based on destructive examination and markings
that provided 7.5V, 1.5V and 90V. So the likely case is "C" voltage or as
---snip---
Hi
The 1.5v cell was most likely for the panel light.
This was common on many of the battery powered sets.
Dwight