Just as Perry mentioned, it is a fuse. They were an add on when we started seeing amps return with blown input IC's. TL072'S If I remember right. I don't recall what caused the IC's to blow. If the fuse is blown, and none are available I would just bypass the fuse. It's been sometime since I worked on these amps, but I've replaced more than I can count on my fingers and toes!
A couple of notes.
The transformers in these amps tended to short unless you have one with the transformer heavily supported in silicone. If they short, they will generally drive 12v back up the RCA shields.
Also, if a bridging speaker wire shorts to ground, it will do the same thing.
The fuse helps protect against fire and/or damage to the head unit.
The secondary center tap is connected to the annular ring of the screw hole that mounts it in the heatsink. If you use a metal screw and the heatsink contacts the vehicle chassis, it will cause engine noise. Using a nylon screw will prevent this.
The transformers in these amps tended to short unless you have one with the transformer heavily supported in silicone. If they short, they will generally drive 12v back up the RCA shields.
Also, if a bridging speaker wire shorts to ground, it will do the same thing.
The fuse helps protect against fire and/or damage to the head unit.
The secondary center tap is connected to the annular ring of the screw hole that mounts it in the heatsink. If you use a metal screw and the heatsink contacts the vehicle chassis, it will cause engine noise. Using a nylon screw will prevent this.
We used to see a lot of shorted transformers right out of the box. The running joke was to grab a transformer and put it aside, then grab another to use as a replacement.That way the better your odds that your not installing a shorted transformer.
If I knew then what I know now!
Great Amps, but they had their quirks!
If I knew then what I know now!
Great Amps, but they had their quirks!
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