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  #1  
Old 7th March 2021, 01:54 PM
Damien Damien is offline
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Location: Howden, East Yorkshire,UK
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Default Phono 3 noise issues

Hi All.

Iím 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.

Iíve 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.

Iíve 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 Iím at it Iíd 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
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  #2  
Old 7th March 2021, 03:37 PM
bob orbell bob orbell is offline
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Join Date: Nov 2009
Location: kettering northants.
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Default Re: Phono 3 noise issues

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
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  #3  
Old 7th March 2021, 05:50 PM
Damien Damien is offline
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Location: Howden, East Yorkshire,UK
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Default Re: Phono 3 noise issues

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
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  #4  
Old 7th March 2021, 05:53 PM
Damien Damien is offline
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Default Re: Phono 3 noise issues

Hi Bob

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

Regards

Damien
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  #5  
Old 7th March 2021, 06:00 PM
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Greg. Greg. is offline
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Default Re: Phono 3 noise issues

Hello Damien and welcome to the forum. Please PM me your email address and I can forward build instructions to you.
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  #6  
Old 8th March 2021, 07:14 AM
bob orbell bob orbell is offline
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Default Re: Phono 3 noise issues

Thank you for attention for the build instructions Greg.
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  #7  
Old 8th March 2021, 10:36 AM
Damien Damien is offline
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Default Re: Phono 3 noise issues

Hi Bob

Couple of pictures of the Phono 3 as requested.
Attached Images
File Type: jpg Phono3 1 cropped.jpg (143.2 KB, 49 views)
File Type: jpg Phono3 2 cropped.jpg (138.8 KB, 46 views)
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