DPDT & SPDT to relay switching illustrations

[10thTx]

In an effort to give back to the generousity of TAG ..................

I thought this might be useful to someone. I use midboost, PAB (preamp boost), Plus-Normal, Clean to OD, and will be trying out Jazz/Rock switching.

I typically think about these and draw them up using a mental picture of mini-toggles that are DPDT or SPDT. Then I redraw them using the Hoffman style relay switching. It occurred to me that others might be struggling to translate the DPDT switching into a relay switching format?

CHECK for ERRORS in the drawings. IF you find any, please post a corrected version on this thread. With the exception of the jazz/rock switch, I have these currently active in my amp builds.

Hoffman relay information with schematics, layouts, photos, etc............. can be found in ARCHIVES here: Relay circuit & layout board & ft switch (el34world.com)

I have found Doug's relay switching to be super quiet and very effective and reasonably easy to wire up. He has them in his parts store under channel switching: https://hoffmanamps.com/

These are just a few examples of how his relay switching can be used. Obviously, there are many other ways to use it. Essentially, anything for switching on a SPDT or DPDT, I think could be converted to relay switching.

With respect, 10thtx

[EL34]

Nice Jeff!

The relay channel switching parts are on this page
https://hoffmanamps.com/MyStore/catalog/Lamps.htm

[dbharris]

This is really helpful. Thank you!

-Dan