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
Search found 487 matches
- Tue Apr 05, 2005 1:01 am
- Forum: Trainwreck Discussion
- Topic: Gain Switching Problem
- Replies: 2
- Views: 1823
- Sat Apr 02, 2005 1:53 am
- Forum: Trainwreck Discussion
- Topic: Switching Info
- Replies: 21
- Views: 6811
Re: Switching Info
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...
- Fri Apr 01, 2005 4:49 am
- Forum: Trainwreck Discussion
- Topic: Switching Info
- Replies: 21
- Views: 6811
- Fri Apr 01, 2005 3:35 am
- Forum: Trainwreck Discussion
- Topic: Switching Info
- Replies: 21
- Views: 6811
Re: Switching Info
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
--mark h
- Tue Feb 15, 2005 2:57 am
- Forum: Trainwreck Discussion
- Topic: Wiring/Soldering Technique Question
- Replies: 11
- Views: 6658
Re: Wiring/Soldering Technique Question
I just use a "mini turret board" as shown (using scraps from discarded boards).
--mark
--mark
- Wed Jan 19, 2005 7:10 pm
- Forum: Trainwreck Discussion
- Topic: First timer?
- Replies: 14
- Views: 6092
Re: First timer?
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...
- Wed Jan 19, 2005 3:15 am
- Forum: Trainwreck Discussion
- Topic: First timer?
- Replies: 14
- Views: 6092
First timer?
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
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