T21 is for band 3 in the mixer.
Calling this T21 is still being questioned. I don't have anything for the early radio that identifies this part as "T21."
Stamped with part number 51286. I don't have a parts list for the early radios that gives anything other than
resistors and capacitors.
A diagram identifies this coil as "B3-S4." Band 3, slug 4.
Letters are for table below only.

A to B: 0.26 ohm C to D: 28.4
Stamped with part number _______.
NOT PHOTOGRAPHED YET
Winding 1: _____ ohm Winding 2: _____
Page: /T21_mix/Index_t21.shtml
Last modified: Thursday, 30 Apr 2026