racking V76s . . .pix now

Steffen · Feb 18, 2005

hi everyone,

I have to rack 2 tele V76. since each of this babes uses 4 tubes they are getting quite hot. I want to put them sideways into the box, otherwise they wont fit into a 3ru case. the case I want to use has ventilation cutouts on the top only...will i run into thermal problems?.
any advice?

thx, steff

CJ · Feb 18, 2005

They won't get that hot. The EF804S is the coldest cathode in the world. (thermal noise, those guys were pretty smart).
Just rack them and don't worry about heat. Do worry about how to get phantom on those old output xfmr's that are ready to pop the second they get phantom.
I would rack them the position theyt came in. That way the tubes stay vertical.
cj

chrissugar · Feb 18, 2005

Send them to me and your will not run into any thermal problem :grin:

chrissugar

Steffen · Feb 18, 2005

[quote author="CJ"] Do worry about how to get phantom on those old output xfmr's that are ready to pop the second they get phantom.

cj[/quote]

uhhh, now I´m scared. :sad:

what´s the best method to get phantom power to the input?

blockingcaps and soft startup?

steff

MikoKensington · Feb 19, 2005

You need a ramping 48V supply.

Oliver has the info somewhere.

http://www.tab-funkenwerk.com/

Steffen · May 24, 2005

DONE! ramped phantom, external 240/220 stepdown trafo, buffered meters.

rafafredd · May 24, 2005

Wich schematic did you use for ramped phantom?

Guest · May 24, 2005

Very very nice VU meters - which buffer/driver circuit did you use?
(oh - and I love those bars that say Front and Back and point int he same direction - true DIY)

gyraf · May 24, 2005

Very tasty indeed. I love your designs..

:thumb:

Jakob E.

electronaut · May 24, 2005

Sweeeeeeeeeeeeeeeeeeeeeet!!!!!

:guinness: :guinness: :guinness:

Emperor-TK · May 24, 2005

I don't think it would be possible to do a better job. :shock: Looks fantastic!

-Chris

MikoKensington · May 24, 2005

Again? Man you make us look bad. :green:

peter purpose · May 24, 2005

Chit Steff.... another beaut.. :thumb:

Michael Krusch · May 24, 2005

:thumb: Very nice design!

The last picture looks a little bit like a computer tower at a lan party. :green:

Bauman · May 24, 2005

Nobody can stop Steffen!!

:thumb: Awesome!!

underthebigtree · May 24, 2005

Holy :!: :!: :!: :thumb: :thumb: :thumb:

I bought a pair of 76's last year, that are finally coming back from Ollie this week after being completely refurbished. I was simply going to mount them sideways in a 3RU cabinet, but this has me rethinking it, to say the least. This is beautiful.

Yikes, Steff - any chance you could post the details of your meter buffering arrangement, as well as how you handled the ramping balanced power?

radiance · May 24, 2005

I'm impressed! :thumb:

Marc Girard · May 24, 2005

I'm jaleous! You've got the coolest designs... Very good job!

CJ · May 24, 2005

:sad: :sad: :sad: :sad: :sad: :sad: :sad: :sad: :sad: :sad: :sad: :sad: :sad: :sad: :sad: :sad: :sad: :sad: :sad: :sad: :sad: :sad: :sad: :sad: :sad: :sad: :sad: :sad: :sad: :sad: :sad: :sad: :sad: :sad: :sad: :sad: :sad: :sad:

Steffen · May 24, 2005

thanx guys!

I´ll draw the ramped phantom PSU and meter driver circuit and post it here.

steff

racking V76s . . .*pix now*

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racking V76s . . .pix now