[AMRadio] Relay

[kenw2dtc]

"I am still searching for information on a Potter & Brumfield relay.  The 
number is SL4349."

This may or may not help:

I have a 1961 catalog and while it doesn't show your specific relay, the 
Potter & Brumfield SL SERIES has the following information:

If the coil resistance is   40 ohms, the voltage is  6  volts.
If the coil resistance is  160 ohms, the voltage is 12 volts.
If the coil resistance is  630 ohms, the voltage is 24 volts.
If the coil resistance is 1400 ohms, the voltage is 36 volts.

73,
Ken W2DTC