Hey guys,
Working on a Collins 212Y remote amplifier. Recapped, refreshed, and sounding good except for a faint 120Hz hum.
All four filter caps have been replaced with 22uf. When I put another 22uf in parallel of the first two caps (C108 and C109) it hushes up nicely.
It uses a 7Y4 rectifier (I think that's equal to a 6X5), but it's only running 182vdc at its output and 174vdc at the 2nd filter cap. These things had to run off batteries in the field.
Is there any harm in swapping the two 22uf out for 47uf?
(BTW. Nothing changes when increasing the values of the third and fourth 22uf caps. I'll leave em as is.)
Working on a Collins 212Y remote amplifier. Recapped, refreshed, and sounding good except for a faint 120Hz hum.
All four filter caps have been replaced with 22uf. When I put another 22uf in parallel of the first two caps (C108 and C109) it hushes up nicely.
It uses a 7Y4 rectifier (I think that's equal to a 6X5), but it's only running 182vdc at its output and 174vdc at the 2nd filter cap. These things had to run off batteries in the field.
Is there any harm in swapping the two 22uf out for 47uf?
(BTW. Nothing changes when increasing the values of the third and fourth 22uf caps. I'll leave em as is.)