Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: olgoat on April 02, 2012, 09:51:00 pm

Title: 5e3 hi/lo jack wiring from library
Post by: olgoat on April 02, 2012, 09:51:00 pm

I was going through the library and saw Hoffmans suggestion on wiring hi/low jacks.   It looks like he relies on the chassis to jack contact for ground. (http://www.el34world.com/charts/images/jackwire2.jpg)

Is this the way most do this?  Looking at the Ceriatone layout I was working from, it looks like they wire the ground tabs to a chassis ground.  The Hoffman pic certainly looks simpler.

Thanks for your thoughts and comments

Title: Re: 5e3 hi/lo jack wiring from library
Post by: PRR on April 02, 2012, 11:27:30 pm

> Is this the way most do this? 

Maybe 50/50.

Classic US practice is to ground metal input jacks on chassis.

There are also plastic jacks which must be grounded via wire.

Either way can work fine.