[Hallicrafters] S-38 queries

[Paul Galpin]

A Happy 2008 to all!

Can anyone help me identify the  S38 that followed me home from an auction?

1. It is painted smooth black, with light green lettering.
2. It has the S38 6 valve circuit
3. It has the S-38A set of trimmer caps; i.e. no double capacitor for C10
and C11. The S38A alignment method seems to work.
4. The "do not remove this cover" cardboard bottom cover is
"rectangular-with-a-corner cut off", 31-338/S38 printed lower LH corner
5. No label on rear of chassis, no protective back cover!

Two more queries
1. although the BFO is clearly oscillating, I don't seem to get any  decent
sort of beat note. Is there a clever way of setting this up?
2. The lamp circuit across one half of the 35Z5 heater drops the heater
volts - one half has the full 17.5 V, and the other about 5V. Checking with
the voltage table, this is correct! As this occurs in the A, B, and later
versions, then what would be the thinking behind this?


Paul Galpin
ZS2PG