6BM8 one tube reverb

[10thTx]

I've found some different examples of 6BM8 reverbs that use "non-traditional fenderish" topologies or values. One of the 6BM8 reverbs did not even have a reverb transformer. Another 6BM8 reverb had numerous differences and no reference for reverb trannie or reverb tank. See attached.

I have several Fender replacement reverb transformers and tanks. So, I'd like to use those and will not purchase something new.

I am wondering if I am using a Fender reverb transformer and tank, IF this reverb set up would work? See Tweed BluezMeister TremVerb

Thoughts?

With respect, 10thtx

[gingertube]

Those typical Fender Reberb Driver Trannies (125A20B) etc.
are 22,800 Ohms to 8 Ohms 3.5 Watt rated.

The only thing about that which is suitable for a SE 6BM8 Pentode drive is the 3.5 Watts bit.

Datasheet value - You want 5K6 to 8 Ohms for those circuits you posted to drive the standard (as used in Fenders) 8 Ohm drive Reverb Tank.

This is the one off the Hamond Replacement Trannies List which would suit:
http://www.hammondmfg.com/pdf/EDB1750B.pdf
Probably an expensive "overkill" for the job.

You could also use the following "cheapy" but perfectly adequate for reverb drive.
http://www.mableaudio.com/en/productvie ... ormer.html

Cheers,
Ian

[10thTx]

Thanks Ian! I appreciate the information.

with respect, 10thtx

[didit]

I would recommend just following in the well worn footsteps represented by the schematics shared. It'll work fine. The original & venerable 6G15 used that same OPT with a 6K6 driving it, for example; and ~7.5K is the idealized load for that tube. This application isn't striving for max power at minimum THD. There are a few threads sprinkled around various sites exploring the dynamics and desirable frequency response through the driver to input transducer of a reverb tank. I unfortunately haven't bookmarked any. To summarize from memory, power needed is ~1W and the nonlinear frequency response introduced by mismatch actually benefits the reverb effect.

Best .. Ian