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Groovewatt - tube RIAA phono preamp
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Author:  laurie54 [ 08 Feb 2018, 00:01 ]
Post subject:  Re: Groovewatt - tube RIAA phono preamp

The issue with TTBL's is the difference between "SIG gnd" and "gnd shield". They are both gnd but should be looked at as being two separate connections which <only> get connected at the phono input point.

Author:  coaltrain [ 10 Feb 2018, 00:02 ]
Post subject:  Re: Groovewatt - tube RIAA phono preamp

Thanks, I'll give it a "crack" and explore the TT in the next week or so. Hope I don't hear any small parts tinkle inside it.

Author:  coaltrain [ 19 Feb 2018, 00:45 ]
Post subject:  Re: Groovewatt - tube RIAA phono preamp

Just an update
I disassembled the tonearm and removed the black ground wire from the signal ground. I then added a new earth ground from earth ground on the Groovewatt and soldered this to the black ground wire from the tonearm. Hum is ~80% better, I may need to do this to the power supply also but for now I am going to enjoy the music. Wow those are some really small delicate wires, thanks for the warning to be cautious.

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