So, I finally finished the channel switcher for my Hughes & Kettner Tubemeister 36!
And here it is all lit up…
Perhaps somewhat foolishly I have built this footswitch at a time when I don’t actually have my amp, due to it being off away somewhere in Germany being repaired, but I’ve tried it with other amps that are set up the same way with RTS jacks, so I know it’s all good.
It’s pretty full on – it’s a buffer (the same circuit as the 072), killswitch, has dual switchable loops (one for clean, one for dirty channels) and also controls the amps FX and reverb. I very nearly put a starvable dc outlet on it, but when it came down to it I decided I would probably never use it, plus it was getting a bit cluttered without mounting components on the upward face of the pedal.
To say it is a squeeze getting all of that in there is an understatement – I used the jack sockets that are typically mounted on PCB’s so that I could file off certain bits of the plastic casing so they would fit into the corners of the pedal.
It uses 3 x 3PDT toggle switches, a momentary soft touch SPST footswitch switch and a 4DPT footswitch, which are not rare components, but certainly not as readily available as most pedal parts
In reality it is a bit too small for large feet stomping it on stage – there’s a real potential of stomping the wrong thing. I probably wouldn’t worry too much about adding the buffer again, although it may come in handy to have. But hey, it is what it is, something I wouldn’t build again, but it was a good thing to do an a lesson on how much you can really squeeze into an enclosure if you want to go OTT!
So if you want to build your own I have included the schematic I drew up for it.
A word of warning – arrangement of this into a Hammond 1590BB is pretty tricky, consider a bigger enclosure if you have the room on your pedal board and want to make you life that bit easier! Plus, by going bigger you could probably use right-angled jacks for the send and return loops, which would save space on the board in the long run!