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Setting up a mini rig, 7-8 wpc
A little monarch SA-614
Digging out cables and mini speakers now.
Monarch Japan used some low grade pots back in the day, I’ve got brand new Alpha brand pots for this unit but the shaft length is slightly shorter. They will work and probably have a cleaner fit, the issue is the source selector shaft will remain the same. I don’t want the amp to have one knob sticking out slightly longer than the others. I can file it down or buy different pots. Just hard to find the original length shafts. The original pots are really open and tend to get scratchy every year or so. A quick spray of some F100 gets them sounding great.
I did fully recap this unit and had to some some careful work on the chassis.
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The original can cap was slight thinner; I had to widen out the hole on the chassis and use a wafer to mount the new can. As you can see it’s an extremely close fit. The amp runs nice and cool; I was worried the power transformer would get to hot near that cap but it just gets warm even after hours of use.
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All new obbligato Copper series and sprague caps. Mundorf too.
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New preamp tube socket as well.
When I got the amp it didn’t produce sound, a quick recap got it playing nicely.
This little amp has some heft to it too. About to set it up with some fostex FRDs
