Two Prong Footswitch On 74 Twin

JBryantfan

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My reverb stopped working on my 74 silverface Twin. I have a 2 prong foot switch
and when the reverb and vibrato are plugged in the vibrato does work. I tried to
put the vibrato channel cable into the reverb channel but it still wouldn't work.
Are these 2 switches interchangeable or does reverb work only for reverb and vibrato
for vibrato? Would like to know instead of sending away for a new 2 prong cable and assuming
there is a problem with the foo tswitch itself instead of the reverb unit itself.
Should the vibrato cable have worked in the reverb? This a picture of the cable.
https://www.amazon.com/dp/B0002KZJB8/?tag=tdpri-20
 

corliss1

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The switches are physically interchangeable but there's two things worth noting:

-the shielded connection needs to be on the reverb side or else the amp will be noisy
and
-you don't need the footswitch for the reverb to work, so something else is happening with the amp.
 

Wrighty

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The switches are physically interchangeable but there's two things worth noting:

-the shielded connection needs to be on the reverb side or else the amp will be noisy
and
-you don't need the footswitch for the reverb to work, so something else is happening with the amp.

Have the later ones got a stereo jack to operate both ?
 

JBryantfan

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The switches are physically interchangeable but there's two things worth noting:

-the shielded connection needs to be on the reverb side or else the amp will be noisy
and
-you don't need the footswitch for the reverb to work, so something else is happening with the amp.
Thanks. I didn't know it should work without it. I will have it serviced.
Wanted to save the trouble of buying/trying a new switch.
I tried the tubes and connections so it must be in the reverb tank
which I believe a pro needs to look at.
 

corliss1

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The reissue amps do use a 1/4" stereo jack for the switching, but they still make the old-style footswitches.
 




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