Notes on T25

T25 is for band 5 in the oscillator.

Early Radio, Round Coils

Calling this T25 is still being questioned.

Stamped with part number 51290. I don't have a parts list for the early radios that give anything other than resistors and capacitors.

A diagram identifies this coil as "B5-S9"

Letters are for table below only.

Resistance measurements made with 4-wire ohm meter.

		A to B (center tap): 1.79 ohm
		B to C: 0.45
		A to C: 2.23
	

Late Radio, Square Coils

Stamped with part number _______.

NOT PHOTOGRAPHED YET

		Winding 1: _____ ohm
		Winding 2: _____
	

Page: /T25_osc/Index_t25.shtml

Last modified: Thursday, 30 Apr 2026