Sano Amp

[HJW]

Hi, new here, and new to tube amps. I bought an old Sano Amp off my local cl, and I'm trying to figure out what f/s I need. The f/s input reads

Dual Ft. Switch
Reverb
Tremolo

Here is my dilema : the seller didn't have a f/s, and told me it takes a 2 switch w/ a mono phone jack. I would think w/2 switches, it would need a stereo type jack. I took the amp to a shop, and we tried 4 2 switch f/s's w/the stereo jack. No go.

So, has anyone seen a 2 switch w/mono jack, or could it be that the word "dual" on the amp simply means a single switch engages both the tremolo and reverb ? The shop had none w/mono jack to try.

I can't read schematics yet, but I found a site w/ a few for certain models. I think mine is the #300R.
::::Larry John McNally::::............................................. ......................

I know they are not a well known amp. Just taking a shot in the dark, in case anyone can help.

btw, do you folks like images posted, or prefer links ? I've got photos of it.

[52 Bill]

Originally Posted by HJW

...the seller didn't have a f/s, and told me it takes a 2 switch w/ a mono phone jack.

Welcome to the board.

What kind of jack is in the amp? Is it a mono jack?
I looked at the other schematics for the Sano amps at your link, and the one that had reverb and trem showed a stereo ft. switch jack. This doesn't mean that your amp has one, but if you find out what type of jack you have, it will help to answer your question.

There are some amps that use a single mono jack to switch multiple FX, but these amps have additional circuitry that sense which switch is on or off. If your amp falls into this category, then you will need to find either an original footswitch or a circuit diagram to have one made for you.

Is your quest for a ft. switch due to the fx not working, or do you just want all the options?

[HJW]

Originally Posted by 52 Bill

Welcome to the board.

What kind of jack is in the amp? Is it a mono jack?
I looked at the other schematics for the Sano amps at your link, and the one that had reverb and trem showed a stereo ft. switch jack. This doesn't mean that your amp has one, but if you find out what type of jack you have, it will help to answer your question.

There are some amps that use a single mono jack to switch multiple FX, but these amps have additional circuitry that sense which switch is on or off. If your amp falls into this category, then you will need to find either an original footswitch or a circuit diagram to have one made for you.

Is your quest for a ft. switch due to the fx not working, or do you just want all the options?

Hi Bill, thanks. I'm not sure if it's stereo or not. I'll see if I can find out. It's a dual chassis set up, and the jack is hidden, so I'd have to pull the preamp.









I'm going to use the guitar input, so I'll need the f/s to use the reverb and tremolo. I get neither without a switch.

I do have a momentary dual switch that has a stereo plug, and with it, the tremelo worked, clicked off and on but not the reverb didn't work. Also, the tremolo works without a f/s if I plug guitar into the stereophonic input, but the reverb doesn't. I could try a keyboard I suppose, just to see if the reverb works at all.

Did the old fender trem/reverb dual switch have a mono or stereo phone jack ?

[52 Bill]

Originally Posted by HJW

Hi Bill, thanks. I'm not sure if it's stereo or not.

Did the old fender trem/reverb dual switch have a mono or stereo phone jack ?

Without taking the amp apart you should be able to feel how many contacts on the jack when you plug in a 1/4" plug. If it is a stereo there will be a second bump to push the plug past.

The original Fender switches use 2 separate RCA plugs.

If the trem works with the foot switch and the reverb doesn't, my guess is that there is a problem with reverb circuit. Probably the tank. If you shake the springs can you hear them rattle through the speaker?

[Enzo]

There is nothing sophisticated inside that amp, purely old school. WHoever suggested a two-button "mono plug" FS is confused. Clearly the plug needs to be a TRS plug - a "stereo" plug.

And that would be the standard plain old ordinary vanilla two button generic stomp switch.

[HJW]

Originally Posted by 52 Bill

Without taking the amp apart you should be able to feel how many contacts on the jack when you plug in a 1/4" plug. If it is a stereo there will be a second bump to push the plug past.

The original Fender switches use 2 separate RCA plugs.

If the trem works with the foot switch and the reverb doesn't, my guess is that there is a problem with reverb circuit. Probably the tank. If you shake the springs can you hear them rattle through the speaker?

Ok, Bill, simple enough. Yes, it is definitely a stereo jack. Same with the stereophonic inst input. 2 bumps.

And yes, tapping the side of the amp, I can hear the springs coming through the speaker. The reverb control works. When I tapped it with the reverb turned almost all the way up, it wasn't a pleasant sound either. btw, I did the reverb test on standby. Should I have heard it while the amp is on standby ? The guitar won't come through on standby though.

[HJW]

Originally Posted by Enzo

There is nothing sophisticated inside that amp, purely old school. WHoever suggested a two-button "mono plug" FS is confused. Clearly the plug needs to be a TRS plug - a "stereo" plug.

And that would be the standard plain old ordinary vanilla two button generic stomp switch.

Right, that's what I thought. I did Bill's "two bump" test, and yes, it's a stereo jack.

[HJW]

Ok, I got the amp back from a tech. Reverb and tremolo works on the stereophonic channel. He replaced the CU10 tube and a resistor I think. Cleaned up some sloppy wiring. Removed the "death cap". I don't have a foot switch yet, but he said the guitar and instrument channels do not utilize the reverb and tremolo. So, now I'm wondering how I can run 2 or even all three channels parallel ? Or any combination of 2 ?

I have a Barber Launch Pad, which can be used as a phase correction device, but it only has 2 outputs. Could I just use an A/B/Y box after one of the outputs ?

[sgnl2nz]

It's not a 300-R. I only know because I have a 300-R with a little sticker that tells me so. Mine has two channels, just the 1/4" stereo input (for a Sano accordion pickup!), 2x12" CTS Alnicos and is powered by 2x7591 with a solid-state rectifier.

My reverb and tremolo work without the footswtches, so I can't help you there. Both the reverb and tremolo are pretty strong on my amp. These were put together rather well. The separate pre-amp and power-amp sections really keep the noise down.