Phono 3 noise issues

[Damien]

Hi All.

I’m new to the forum but realise from the wealth of experience out there it will be quicker to ask for advice than reinvent the wheel.

I’ve recently acquired a WD Phono3 & PSU 3.

It exhibits a lot of background noise even with no turntable connected. Not mains based but more like what you would hear with a poorly tuned radio station.

I’ve pulled it apart & the build quality leaves a lot to be desired so plan to rebuild as there are definitely some poor solder joints & some of the cabling is not well shielded.

Whilst I’m at it I’d like to incorporate any recommended improvements for both units so would appreciate recommendations.

It currently has a pair of CED? G7LG7 & a J J ECC83S.

The caps & resistors all look to be pretty low spec & am happy to invest in better quality components.

Any suggestions would be welcome.

The phono stage is coupled to a Michel Gyrodeck SE with an SME V tone arm & Cartridge Man Music Maker 3 high output MM cartridge with an output of 4 mV & a loading requirement of 47k.

Thanks in advance.

Damien

[bob orbell]

Some pictures of both would help, with regard to the G7LG7, I cant find any reference to that number, ECC83 is what it was designed to run with, so that is what I recommend and use, the supplied capacitors in my opinion are good and I suggest you leave as was supplied but sort the bad construction out first, this is a good phono stage that can be made better, but, as said, sort the poor build out first, and pictures. Bob

[Damien]

Hi Bob.

Many thanks for your prompt response.

Having looked again the valves marked G7LG7 are also marked J J ECC83S on the other side so it appears all 3 are the same. Apologies for my ignorance on this one.

I 'll do as you suggest & re work both units initially so I have a good start point.

Are the original build instructions available as I didn't get them with the units?

Best Regards

Damien

[Damien]

Hi Bob

I'll get a few pictures of each & attempt to upload them.

Regards

Damien

[Greg.]

Hello Damien and welcome to the forum. Please PM me your email address and I can forward build instructions to you.

[bob orbell]

Thank you for attention for the build instructions Greg.

[Damien]

Hi Bob

Couple of pictures of the Phono 3 as requested.