Electrohome Mono Hifi into 5F11 Vibrolux

[Toxophilite]

Well
i'm not at all stuck on a vibrolux
I've built one using somebodies 50 vintage pa/instrument with nice hammond transformers
I've just switched the bias steal over to the blackface princeton type and that works well and has less components than my original setup
I have it in a little homemade cab with a JBL D130 and it's big loud sounding if I want it to be
(see 'Unfair bias thread on Hoffmans forum if you want to see a picture, my apologies I can't post them here..time to get a new computer)

So far I'm leaning towards a deluxe AB763 I have a GZ34 rectifier from another amp and I get 420 volts off the B+ of the rectifier when i fire it up so that should be enough. The out put transformer looks like it could handle the power too as it's a single tap and quite big. Do that and use the vibrolux or blackface princeton tremelo circuit as it seems nice and simple and sounds good. Either that or just build a Blackface princeton AA964.

I've really appreciated all the helpful information here so far

[ron vogel]

You just need to tap off the bias supply like the 6G3 to make it work. Be mindful of the cathode bypass cap on the trem circuit; if you use the stock value and the osc dissipates at low trem speeds you will need to throw a 47uf or 100uf in there to get it working right. Also, look at the 6G3 circuit for an extra .02uf cap that goes from the b+ (after the 220K) to the cathode bypass cap on the trem circuit. This really helped quiet down the bias/trem of my 6G2.

[ron vogel]

Ehh, I took a look just in case about that .02 cap from the deluxe...can't remember where I actually got that from...cause it aint on the 6g3! anyway, I made this up in MS paint off the 6g2 schematic...this is how mine is now...my B+ is really close to what you say you have.

[Toxophilite]

Cool
I'll look into that
Somebody was mentioning the vibrolux 6G11 tremelo circuit as well. I guess that's a whole 12AX7 circuit though
Picked up some extra electrolytics and resistors today, likely start assembling this eve
I have to move a couple things around first though