Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Bugman3183 on November 11, 2013, 09:11:39 am

Title: foot switch jack
Post by: Bugman3183 on November 11, 2013, 09:11:39 am

Hello all, I recently finished a cab for an 18 watt tmb I built a while ago that had a Cascade switch on a dpdt on the front panel.   Before I install the amp I wanted to make the Cascade mode  foot switchable.  Unfortunately I know absolutely nothing about relays, but I have gone through the archives and gathered information and more I'm ready to give it a shot.   The thing I can't seem to figure out is what kind of Jack to use for the foot switch.   Any help would be greatly appreciated and sorry for the lengthy post.  Thanks

Title: Re: foot switch jack
Post by: sluckey on November 11, 2013, 09:48:06 am

I would use a Marshall style 1/4" phone jack that has the sleeve isolated from ground.

Title: Re: foot switch jack
Post by: Bugman3183 on November 11, 2013, 09:54:30 am

Cool,  thanks.   Does it matter whether it's mono or stereo?

Title: Re: foot switch jack
Post by: sluckey on November 11, 2013, 10:19:10 am

No. Either will work but since you will only have one switch the mono jack is all you need.

Title: Re: foot switch jack
Post by: HotBluePlates on November 11, 2013, 10:19:29 am

Do you have 1 function or 2 for the footswitch?

If you only have one thing to turn on/off, mono is fine. If you have 2 different things to turn on/off (with separate switches), use a stereo jack.

If you think you might need 2 switches in the future, get a stereo jack, as it can still be used in mono mode.

Title: Re: foot switch jack
Post by: Bugman3183 on November 11, 2013, 10:31:05 am

Great!   Thanks a lot for the info.   Now I finally order my part.