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

Guitarist28 · 13th Sep 2019, 5:05 pm

For the EL84, the grid resistor (pin 2) should be 680kR and was actually 940kR!! I've replaced it and again because its out in the workshop, I could only test it quickly with a guitar lead and rubbing the end (I know this is not the best way to do this). Yes, it is louder but I still think it short of the mark.
The power resistor to pin 9 rated at 200R is measuring 209R so no problems there.
Additionally, I have noted that:
- volume control to the 2nd channel isnt working at he moment
- the EF86 has either blown or is not getting power as there is no filament glow

Any suggestions for putting a signal through the input rather than a guitar at this stage?

13th Sep 2019, 5:05 pm	#159
Guitarist28 Heptode Join Date: Dec 2009 Location: Hockley, Essex, UK. Posts: 575	Re: Shaftesbury 519 amplifier For the EL84, the grid resistor (pin 2) should be 680kR and was actually 940kR!! I've replaced it and again because its out in the workshop, I could only test it quickly with a guitar lead and rubbing the end (I know this is not the best way to do this). Yes, it is louder but I still think it short of the mark. The power resistor to pin 9 rated at 200R is measuring 209R so no problems there. Additionally, I have noted that: - volume control to the 2nd channel isnt working at he moment - the EF86 has either blown or is not getting power as there is no filament glow Any suggestions for putting a signal through the input rather than a guitar at this stage?