TSC MOSFET for Hughes and Kettner Tubemeister Grandmeister (pack of 2)

Description

This TSC MOSFET (FET) is for repairing the TSC circuit in the Hughes and Kettner Tubemeister and Grandmeister models. These amplifiers have a Tube Safety Control that monitors the bias current through the EL84 power valves. This can occasionally fail, leading to the safety circuit to shut down the amp and an error code on the TSC lights. This is fixed by replacing the TSC FETs

This listing is for a pack of 2 FETs, so 1 pack will be required for a TM18 and 2 packs will be required for the TM36, GM36 or GM40 deluxe.

The Reference Designators for the TSC MOSFETS are:

GM36: Q14-Q15 Q23-24

TM18: Q14-15

This is not an easy repair job. If you’re in the UK, you might want to post the amp to me at Keld Ampworks to get it done. 🙂