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In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.
Post Subject: You get the idea….Posted by Romy the Cat on: 11/15/2020
I disagree with an idea that PP introduces different grounding schema into system. I mean it does and it does not. Anything the in your power pass induce different grounding schema and PP not different. I personally did not experiences that PP introduces any unexpected grounding schema, at least if you use PP in the system in the way I always do: no PP own ground is used in the system in any way of form. Let leave aside the probability that you specific PP is defective. If it is then all bets are off. If you have no problem with noise with the rest of you system but only your phonostage then it is most likely the problem with your phonstage. The fact the PP might highlights the problem is kind of irrelevant. Generally I recommend to ground everything to a main negative bass terminal that sits RCA jack. Still in real world each assembly is different, different step-up transformets schemas and zillion other variables.
 
It is impossible to debug it over internet. Jarek you can use the pattern the I use using my soldering period of my life. It is very effective and I always was able to found ground problems. Turn the playback on, max out the volume with your Phono on and observe whatever noise you feel you have. Solder 10-15 inch 10Ga wire to you negative grounded terminal. Then begin to tough diligent points of you circuitry with other sides of your wire. You very fast will find how to bridge you ground in order to get rid of you noise. You might hold that wire in hands and just short different pars of grounds, but your hands might act as own antenna. You get the idea….

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