I asked that question about another one of my old amps a while back (Supro Supreme circa 1949) and the answer was no for the below Supro amp :
But for the amp below (A Valco cousin made by National), I believe the Field coil in the below National 1212 amp also serves as a power choke., is this correct ?
I think I've seen field coils wired from B+ to ground, in which case it does not act as a choke, but may be acting as 'ballast' to load down the supply.
In your Supro example, I think this is the whole schematic, with the field coil shown as '1000ohm 25W'. If so, yes it is acting as a choke, not sure why it would not be deemed as so, unless there was confusion about whether it was a choke or a resistor.
Just because they don't have tubes doesn't mean they don't have feelings! - glebert
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