[ARC5] Another hack job...

[Mike Morrow]

Ken wrote:

> In any case, I installed a 5631 transformer taken from an even worse-hacked 
> BC-453 and wired it correctly.

Ken,

The 5631 was not used in any of the SCR-274-N receivers.  I posted T-1 details
a couple of days ago, which are partially repeated below with Robert's 
suggested convention for impedance values).

RAT, RAV, ARA, AN/ARC-5 models:  T-1 300-ohm secondary (A.R.C. part 5631).
Primary - 4000 turns #40 enamelled wire, tapped at 2000 turns.
Secondary - 500 turns #32 enamelled wire.

SCR-274-N -A models:  T-1 4000-ohm secondary (A.R.C. part 6308).
Primary - 4000 turns #40 enamelled wire, tapped at 2000 turns.
Secondary - 1800 turns #38 enamelled wire.

SCR-274-N -B models:  T-1 4000/300-ohm secondary (WECO part ES-691027).
Primary - 4000 turns #40 enamelled wire, tapped at 2000 turns.
Secondary - 1800 turns #38 enamelled wire, tapped at 475 turns.

That must have been a R-23*/ARC-5 donor, and so it has only a 300-ohm
low impedance secondary.  I'll bet that you did not care about the high
impedance secondary of the T-1 that would normally be in a SCR-274-N
receiver.

Mike / KK5F