[Hallicrafters] S40A Help

[Ian]

It should be easy to use the S40 schematic.   Make a same size copy and do
some circuit tracing and note any differences you find.   Can't be much
difference and it should be a good exercise to get familiar with the
circuitry.

If I had a later schematic I'd have just used it and not wasted my time
trying to find the exact schematic for such a simple receiver.  

However the 80 and the 5Y3 are really the SAME tube with different bases.
Thus I'd suggest there's little, if any, difference in the schematic.

I think you may be making a problem where none really exists.   Do the
simple circuit tracing to make sure.


Ian, K6SDE



>-----Original Message-----
>From: hallicrafters-bounces at mailman.qth.net
[mailto:hallicrafters-bounces at mailman.qth.net]
>On Behalf Of R Bottomley
>Sent: Sunday, May 15, 2011 1:26 PM
>To: hallicrafters at mailman.qth.net
>Subject: [Hallicrafters] S40A Help
>
>I have a Hallicrafters S40A that I bought in 1948? And the problem is that
I
>cannot find a schematic for this model.
>
>The rectifier in my radio is an 80, not a 5Y3 as shown in all of the A
model
>schematics. The S40 had the 80 but the wiring in my S40A is different
>
>from what is shown in the S40 schematics. (don't remember where as it was a
>long time ago that I looked into it).
>
>Around 1955 I wrote to Hallicrafters for the correct schematic but the one
>they sent me shows the 5Y3, not the 80 tube.
>
>Does anyone have any information on this S40A  that appears to be an
interim
>model between the S40 and the S40A?
>
>Thanks for any help you can give me,
>
>Bob Bottomley
>