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Fuse burned out in shipping? ?

Okay, I bought an amp--a Halfer DH220--from a 'gent' who assures me it was in perfect working order prior to arriving. It arrives and one channel doesn't work. It was poorly packed, so I wasn't surprised, but it also had a burned fuse on the channel that no longer worked. Bad sign.

So I write this 'gent' who continues to insist that the amp was functioning at the time of shipping and he can't imagine why a fuse would of burned out. ---- He suggested that perhaps something happened in shipping to cause the fuse to burn out!! ---- Okay, I'm not an electrical engineer, but I smell BS. However, I decided I would give his story one tiny modicum of the benefit of doubt and come here and post. Soooo.....

Is there ANYTHING that could happen to an amp, packed inside a friggin box and not plugged in, that could cause it to burn out a fuse? I think this is complete crap, but hey, I'm not gonna crucify someone if I'm wrong.
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Showing 2 responses by mofimadness

mofimadness's avatar
mofimadness
5,367 posts
 
IIRC, the Halfer amps have "inside" fuses also. Make sure you check them. I think they are on the botttom of the inside of the amp in dual mount fuse holders, (2 for each channel). I bet they are toasted too.
mofimadness's avatar
mofimadness
5,367 posts
 
The fuse you describe is a slo-blo fuse. These are usually inline with the power switch/supply. They do indeed get an inrush of current, thus the discoloration of the fuse.

Did you check to make sure the right channel RCA input jack is wired and also the right channel binding post wiring. Also on the RCA jack, make sure the center pin is touching the contact. If this amp has had a bunch of different interconnects in and out of it, it might not be making a good contact. You can see from the inside of the amp, if the center pin is touching the contact. Sometimes those wires can come loose. I was a Hafler dealer, back in the day, and built many of these amps.

One of the posts above has a link to the owner's manual which also has the build out instructions with pictures, (these amps were available as a kit or factory built). Maybe follow through the diagram to make sure all the wires are hooked up. It's a pretty simple design.
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