Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: mikhett on February 19, 2011, 12:21:31 am

Title: spst switch did i order the wrong switch?
Post by: mikhett on February 19, 2011, 12:21:31 am

I need a new power switch(on/off) for a 1967 Ampeg reverbrocket.It has 4 terminals the one term goes to the fuseholder and the other term goes to the one side of the pt primary winding.the 2 bottom terms go  to ground .one at the pl connection the other term to a filter cap ground.thats the way it was originally.this original switch should be a spst switch,right?Doug sent a 3 term switch i think is spdt.HELP.Thanks Mike

Title: Re: spst switch did i order the wrong switch?
Post by: jeff on February 19, 2011, 05:33:07 am

If it has 4 terminals I don't think it could be a spst. spst stands for single pole single throw. The pole is how many things you're switching and throw is how many things you switch it to. A spst would have only two terminals. I think you need a dpst. Sounds like you're switching two things at once. Fuse to transformer and something to ground.


do you have a picture?