Question about Audio Players & Recorders
Fuses blow when there's an overload. This is usually caused by a transistor or IC that has shorted. You should look to the main amp as the most likely cause. If the main amp has transistors, then a test with an ohmmeter will show the faulty part. Connecting across the terminals will show the same as when you touch the test probes together. If you don't see a hole in the part first!
Posted on Oct 19, 2013
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Posted on Jan 02, 2017
I have a classic 50/50 as well and re-tubed it with JJ el84s, vintage teslas and mullard 12at7s. As long as you replaced it with EL84s, I can't imagine that the output would be increased enough to damage the OT. When I got my 6505 Combo, one of the 6L6s was bad, and it kept blowing fuses and howling like a banshee. I would think that an OT problem would result in a significant loss of output...or none at all. I've gotten DOA tubes from a few places. I would suggest swapping each tube out 1 by 1, until you find it...if that is indeed the problem...before you pay the cash to have it worked on.
Posted on Oct 29, 2007
There are many variants of this amp depending upon its age. The fuse will be a ceramic one that should be solid white and be around 10A or more. This will be about 1-1/4" long and located inside the amp. Remove the top cover for access. It will be in a fuse holder. Please make sure that the unit is unplugged before opening.
Posted on Jul 05, 2009
check speaker wires for shorts. verify correct speaker impedance (if amp if for 8 ohms, don't use 2 ohm speakers. Make sure not overheating issues with junk on top of amp.
Posted on Dec 29, 2009
My cs400 puts out at about 1/10 volume on both channels. Best I can tell with my Huntron is that all transistors, diodes and caps are good. All op amps tested good. Plus and minus 58 vdc and 16vdc on zener board seems fine. The problems is common to both channels.
Posted on May 28, 2010
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