EF86 Vibroverb

[valvetones]

Pretty Groovy. Need to build the head cabinet and speaker cabinet.
Reforming the caps worked like a charm.
Few pics from the process.
I did change the reverb driver to an old fender one. And the EF86 coupling caps where made larger.
The vibrato channel B+ was coming back to the tone pot, so I added a cap after the tone pot which put the two caps in series which cut the capacitance in half , which made the tone control not roll off much.
So changed the EF86 plate cap and cap after the tone control from .0033 to .068.
Much better.

[valvetones]

Reforming the old caps worked like a charm.

[valvetones]

Transformers fit like a glove.
Triad output
Stancor power (used a zener to get the B+ perfect)
Triad choke.
Noice!!

[valvetones]

One curiously though.
Did the Vibrato on the 6G16 work on the normal channel too on original fenders?
It does on this one, which I thought maybe had to do with the EF86 normal channel, but then checked my other VV build, and it works on that normal channel too.
Pretty sure I got it right.
Just surprised that the vibrato works on the normal channel.

[valvetones]

On the original VV it has two 16mfd caps in parallel for the reservoir.
I just used one 30mfd cap.
And didn’t have all the 16mfd caps I needed , so the last node I used two 8mfd in parallel.
So things kinda shifted on the cap board.
Just in case it looks weird to anyone.

[valvetones]

The ceramic switch got changed from the Lil one to the big one.
Barely fit. But now I can switch between 4/8/16 if needed.
Good rotary switches are kinda hard to find. I was surprised!

[valvetones]

So the triad OT is an SX-201
3300 ohm primary.
So the big head scratcher now is
6L6’s, EL34’s or EL37’s
I’m deliberating
Leaning towards the EL37’s though.

I have a pair of WE350B’s laying around too, but I don’t know if the screens on those would tolerate the voltages, and I don’t wanna find out that they won’t if y’all know what I mean. That would be a somber moment.
I think the EL37s with a mess of telefunkens in the preamp may be the ticket.

[valvetones]

Oh I almost forgot, because of this 8 ohm decision below, does anyone know if I need to tweak the NFB resistor values since the original 6G16 ran on a 4 ohm setup?

[sluckey]

Did the Vibrato on the 6G16 work on the normal channel too on original fenders?

yes

Oh I almost forgot, because of this 8 ohm decision below, does anyone know if I need to tweak the NFB resistor values since the original 6G16 ran on a 4 ohm setup?

Not necessary. Just connect the NFB circuit to the 4Ω tap on your multi-tap OT.

[valvetones]

Thanks Slucky.
Stay awesome myfriend.