10-09-2021, 06:35 PM
Hi Tracy.
Only on one occasion did I notice a permanent drop in output. I was doing the same and the phone rang, I left the magnet a couple of millimetres away from the valve for at least half an hour. On removing the magnet output was down, not massively by any means but yes a drop..
The use of a tape head demagnetiser passed over the valve a few times and a gradual increase of distance brought it back up. Again it was the 1j42a in my pantry TX. from memory it was like a drop from 5v p-p to 4.8.
Only on one occasion did I notice a permanent drop in output. I was doing the same and the phone rang, I left the magnet a couple of millimetres away from the valve for at least half an hour. On removing the magnet output was down, not massively by any means but yes a drop..
The use of a tape head demagnetiser passed over the valve a few times and a gradual increase of distance brought it back up. Again it was the 1j42a in my pantry TX. from memory it was like a drop from 5v p-p to 4.8.
