So I have a Quicksilver Headphone amp (2 x EL84’s and 2 x 12AX7). I was looking around at things and ran across the MOV is implemented in this amp in line with the fuse and power switch. Like this -
Apologies for the crude drawing. But every instance of an MOV I can find is across L and P and not in series. It is usually after the fuse as well, not before.
Can anyone tell me why the designer might have done this? And is it safe to move it to where it should go (across the mains after the fuse)?
I don’t want to remove if it is doing anything worthwhile.
Apologies for the crude drawing. But every instance of an MOV I can find is across L and P and not in series. It is usually after the fuse as well, not before.
Can anyone tell me why the designer might have done this? And is it safe to move it to where it should go (across the mains after the fuse)?
I don’t want to remove if it is doing anything worthwhile.
It very well could be an inrush limiter, I never even knew such devices existed. That would make sense as well since we are talking turning on tubes.
And looking at those, it seems it would likely be AFTER the fuse and switch even. And likely just used it for the fuse for convenience.
In reality, I am trying to trace down some mains noise in the amp and saw this and it puzzled me. Thanks for the info.
And looking at those, it seems it would likely be AFTER the fuse and switch even. And likely just used it for the fuse for convenience.
In reality, I am trying to trace down some mains noise in the amp and saw this and it puzzled me. Thanks for the info.
NTC's are deployed in series with the "hot line", before of after the fuse does not matter much, the MOV otoh is parallel to the transformer primary and must be installed after the fuse...if not after the fuse and that MOV failed, it will be explosive, at least after the fuse, current is interrupted....