Anyone recognizes this selector-on-top PT?

[BlueX]

I'm interested to know make/model, and if it was used in a specific amp model.

It served longtime as replacement in a modified JTM45, powering 3xECC83 + 2xEL34 with diode rectifier.

• Selector on top: 110, 220, 245
• Stack size: 3 3/4" x 3 1/8" x 1 7/8".
• Resistance: Primary 6,1 Ohm (110), 17,1 Ohm (220), and 19,8 Ohm (245). Secondary, HT 43,5 + 40,0 Ohm.
• Voltage: 3,15-0-3,15 and 335-0-335 VAC.
• Wires: Two black primaries go in on top, HT red-green-red, heaters black-yellow-black (all solid), and one green wire without connection to any winding or PT shell (connected to chassis ground in amp).

 

[PelliX]

I'm not the end-all be-all expert in these, but my best guess, also observing the grommet, wiring sleeves and such is that it's a Drake.

 

[SG John]

Looks like a Radio Spares transformer from a '65-'66 JTM 45.

 

[PelliX]

Looks like a Radio Spares transformer from a '65-'66 JTM 45.

The grommet and the plastic shielding around the wires look at a decade or two newer to me? Did RS have that endbell shape?

 

[BlueX]

Looks like a Radio Spares transformer from a '65-'66 JTM 45.

It doesn't have any 5V heater winding, for GZ34 or similar rectifier valve.

I thought about EZ81/EL84 type of amp, like Vox AC-10. Seems like all heaters are connected to same winding, and EZ81 heaters are not electrically connected to cathode (as I understand).