Recent content by 16Bit

You can also get them on Amazon, Ebay, or probably your local electronics supply store.

You’re correct about running a tube amp with no speaker attached. I would try to just solder the speaker wire back on to the speaker and test it to see if it still works. If you don’t have a soldering iron, you can try to use an alligator clip lead just to quickly see if there is any output to...

After having to repair my FU-2 footswitch for my Quad preamp, I redrew the schematic to make it more readable and less cluttered, since the only one I could find online was an old photocopy that was barely legible. New schematic https://i.postimg.cc/ZqFM70w9/FTSW.png Video of how I repaired...

Regarding the 5-way switch, can you see a part number on it anywhere? I know that there's not a lot of room to see anything in those amps, but maybe get a little folding mirror and see if you can get a number off it. I just checked the Mesa website and there were none listed for sale there. If...

Interesting question. The FU-3 has 6 wires in the plug: 2 for the power (+15 volts DC and ground), so you might be able to get away with grabbing the power for these 2 wires from just one of the amps, or you could power the 2 wires from a separate source if you were feeling adventurous. 2 of...

Mine is a 6 and 1/4 amp slow blow.

I wanted to post this to try to help anyone who is having a similar problem with their Quad Preamp. I found an FU-2 foot switch on an online auction site, and when I got it home I noticed that it had a similar problem that a lot of other people have had; when a button was pressed, all the LEDs...

I finally fixed the foot switch for my Quad; I had to resolder a broken leg on one of the big disc capacitors, and then I traced the problem down to a bad 74165 chip. When I replaced it, the foot switch started working like it should. 👍 Edit: my foot switch works just fine with either a...

I had an issue once with mine when one of the wires came off the footswitch socket inside the amp. Based on the fact that you can still turn the loop on and off, this could be one possible explanation. You might also have a wire loose inside the footswitch itself, whether inside the enclosure or...

What you said sounds correct. I’m having problems with my foot switch too and I didn’t realize that I needed a shielded cable. I’m going to order some cable and redo the connectors on either end and if it works I’ll let you know.