UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

MotorBikeLes · 22nd Mar 2018, 9:44 pm

Rod, most of your questions were answered many posts up if you read them carefully.
The D54 is a dual S54A, but there was an S54 (mentioned but then "unmentioned" in the Tek (US version) Telequipment catalogue back in the '70s. The S54 had nuvistors 13SD4 from memory, the 12v heater equiv of the 6SD4.
Two in the Y amp (dual Fet in S54A/D54) and one in the T/B in the TR107 equivalent position. I found it simple to replace all 3 with FETs, saving the cost of expensive nuvistors. Of course it does mean I have good tested nuvistors in stock today.
Les.

22nd Mar 2018, 9:44 pm	#20
MotorBikeLes Nonode Join Date: Dec 2012 Location: Kirk Michael, Isle of Man Posts: 2,350	Re: Telequipment D54 ? Rod, most of your questions were answered many posts up if you read them carefully. The D54 is a dual S54A, but there was an S54 (mentioned but then "unmentioned" in the Tek (US version) Telequipment catalogue back in the '70s. The S54 had nuvistors 13SD4 from memory, the 12v heater equiv of the 6SD4. Two in the Y amp (dual Fet in S54A/D54) and one in the T/B in the TR107 equivalent position. I found it simple to replace all 3 with FETs, saving the cost of expensive nuvistors. Of course it does mean I have good tested nuvistors in stock today. Les.