Tube rectifier and solid-state rectifier

[diagrammatiks]

look at some mesa schems.

[dcribbs1412]

Just wondering about the Carr Slant 6v
bias system?


Darin

[glasman]

One thing I didn't see mentioned is that you will probably need two rectifier tubes in parallel to handle the current required by 4X6L6s.

I would suggest 2x5U4GBs in that application (5AR4 might work too).

Gary

[heisthl]

Just wondering about the Carr Slant 6v
bias system?


Darin

Kind of ingenious - See attached diagram, right side is the outer pair cathodes and the left side is the inner pair cathodes.
1. Outer pair is grounded through the 15 ohm and the 1 ohm TP resistor.
inner pair is cathode bias
2. Ground lift of outer pair, inner pair still in cathode bias
3. same as 1. except inner pair is lifted.

[Luthierwnc]

I built an EL84 amp with the Hot Cat tube/SS switch and it wasn't worth the effort. The tube side was much better. On an experimental build (which is most of them), I tell myself those types of options are for tonal flexibility but it is largely because I don't know which way I'll like better. Once I do, that is the only way I play it.

The 5F8* Twins use a tube rectifier to supply 4 5881s but with only around 400 volts. You would probably need two rectifier tubes which lessens the sag and makes the exercise less interesting. You also need to find a 5v supply with some amperage behind it plus plenty of extra room for the caps.

Good luck anyway, sh

[dcribbs1412]

Thanks for the info heisthl

Kind of ingenious

Agreed