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In Reply to: RE: Where would i put the ferrite beads? posted by DAK on January 15, 2017 at 22:52:30
I would start with the large snap on type on the power cord and audio input cable.
Then the tiny donut type around the wires leading to the grids.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Follow Ups:
I got a snap on the power cord already. But i can put the bead type on the inputs. Do you think a grid stop resistor is warranted on the input/driver tube? The amount of gain from the driver tube is already on the low side since the amp is only 2 stages. thanx tre.
If the amp behaves in a different location then we are assuming that you have a lot of RF at home so, yes. A grid stop resistor on the input tube might be just what you need.
It's easy enough to try.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
The amp was stable for about 10 minutes then slowly the cathode current of the 6550 started to tick up, and then it picked up speed and i shut it down. I also put in a grid stopper on the input/driver tube. I put the ferrite bead on the wire lead to the grid stopper. it is short not even 2". Maybe i should go with a shielded input wire? The run is short as i said.
Edits: 01/16/17
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