The Amp Garage

Make sure none of the relay power wiring is connected to circuit ground or the chassis, e.g., the push-pull switch, particularly if the heater winding is center-tapped and connected to ground..

--mark h

The MOSFETs are about 1 gigaohm (1000 meg) when off, so leakage is not a problem even in high impedance tube amps. The switching is instant and silent, and there are no contacts to wear out. :-) Yes, the SSR is NO/NC as labeled when nothing is connected. Closing the jack connection "un-normals" them...

I have had good success recently using NEC MOSFET opto switches. They're small, efficient, and have ratings up to 400v. I can do a writeup if anyone is interested.

--mark h

I just use a "mini turret board" as shown (using scraps from discarded boards).

--mark

Thanks, all, for the feedback. Mark, PS. Are you the mhuss that built the JTM-45 clone with the Swanson cabinet? I ended up ordering a Swanson head cabinet after seeing your amp for my Metro plexi clone I'm about to build. That would be me, if you're referring to http://mhuss.com/SmallBox/ 8) Jeff m...

hi all,

Omar, congratulations and good luck with your tw site.

Out of all the choices in the files session, what would this group recommend for a first TW build?

thanks,

--mark