WAD Phono II problem

[KennyK]

Thanks Richard

My board is WAD PHONO II Issue 1


I've had to bypass a number of tracks as and when I was doing mods previously (that PCB seem fragile), including some PIO caps in the PCB C22/23 position (=C18/19) as well as a number of resistor mods.

The Phono has worked faultlessly for a number of years since the last modifications which included an extra switch on the PSU to turn off the Phono. From memory I think it only switches off the heaters, so I'm guessing that everything would be getting stressed with a 'cold' HT ?

One channel has gradually dropped in volume over time. interestingly when turning off, the channel volume increases briefly before it finally dies down again.

I'm fairly sure I have the 3.18uS mod and I'd like to keep that