Rerurn to Romy the Cat's Site
In the Forum: Analog Playback
In the Thread: The last phonocorrector: “End of Life" Phonostage
Post Subject: Seek and you’ll find.Posted by Romy the Cat on: 11/29/2011
fiogf49gjkf0d
 N-set wrote: |
| ... I cannot imagine where the fuck I should have a loop??? |
|
And you are not alone. Any single person who is chasing noise in phonostage ask himself the same question. I assure you that sun of later you will find it and it will be much simpler then you think.| N-set wrote: |
| ... Shorting the stages kills the hum when I short the plate of the second stage (not the grid, but exactly the plate). |
|
Did you try just for test to increase the caps value that short the plate to ground? Will it amount and the character of the noise change? | N-set wrote: |
| ... What am I left with? Shield and proceed? |
|
If I were you then I would use elimination techniques. Get rid of the output buffer and see if the noise still there. Replace the air caps in feedback with mike or alike and see if noise is there. The air caps are in a way antenna and they suck anything from air. My experience with similar problems suggest that it is good to take you mind away from it and do something else. Then is time you return back to the project and you will suddenly come to you…
The CatRerurn to Romy the Cat's Site