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

Refugee · 28th Mar 2020, 12:04 am

I would take the EL42 out and link all the grids to the anode and apply 6v to the heater and test it with a 10K resistor and a 30V power supply.
If that fails disconnect the grids one by one while repeating the test.
You might be able to find what grid has got a loose wire on it.

28th Mar 2020, 12:04 am	#43
Refugee Dekatron Join Date: Apr 2012 Location: Worksop, Nottinghamshire, UK. Posts: 5,553	Re: Grundig TK 5 Restoration I would take the EL42 out and link all the grids to the anode and apply 6v to the heater and test it with a 10K resistor and a 30V power supply. If that fails disconnect the grids one by one while repeating the test. You might be able to find what grid has got a loose wire on it.