Has anyone ever done a PCB or build for V72 or V78?

If so, is it available anywhere?

    acccidental post - sorry

Drip used to make em... not sure if they're still being made though.  I know Purusha made cases... might try his site

cheers,
dave

I am currenty building a Drip 72, should be finished in a week, maybe two.
Will post my findings in the lab.

Mercury has made one already assembled for you, priced like a decent car;

http://marquetteaudiolabs.com/product_mercury_m72s.html

There´s also the 672, excellent discrete version of V72, i own a pair, got the modules cheap some years ago. David Marquette racked them up for me, really a looker and also an excellent tool.

http://marquetteaudiolabs.com/product_mal_672.html

Hhhm. Yeah. PCBS for V72 would be interesting!

Thanks for asking an obvious question
[ which doesn't seem to have been asked ? recently ? ]

I'd be in for a couple if anyone takes up the task
i haven't developed my cad skills yet , to do it myself

What version are you all thinking of? v72A with tubes or the v72t with soild state

There's a solid state V72??? What???

Kidding.

I'm sure it's the tube version that's the cats pajamas.

Mark

Biasrocks said:

There's a solid state V72??? What???

Kidding.

I'm sure it's the tube version that's the cats pajamas.

Mark

Click to expand...

A PCB layout for the (tube) V72 sounds like a fun project. I assume all the iron would be off the PCB? I'm game to have a go. Which circuit are we going to take as gospel?

Cheers

Ian

I like the original V72 (non-A) version. Less gain, better sound.

I have a pair here if we need any info from the actual unit.

Lot's of good quality iron in those puppies.

Mark

I think the v72 has a choke feeding the plate voltage to the tube, like Sowter 9375 - costing 60 BRP.
I recall reading in a thread on this that it is a key component to how the output tube functions...

http://vunaudiotech.wordpress.com/v-72/

I know the company guy, maby he has some pcb to sell

M.

mik said:

http://vunaudiotech.wordpress.com/v-72/

I know the company guy, maby he has some pcb to sell

M.

Click to expand...

The V72s version would be nice, it's the studio version of the V72, one extra resistor and a slightly different input transformer. While the transformer may be a challenge, the extra resistor would be easy. A nice addition would be a 1/4-inch DI input along with a variable gain control with the proper compensation to maintain frequency response.

Here's a thread that CJ started a while ago.

http://www.groupdiy.com/index.php?topic=6272.0

Mark

Or if you're really gonna go the distance, a V76 would be even better. Basically two V72's back to back but with one set of transformers, variable gain, high & low pass filters and enough gain for just about any micing situation.



Mark

Yeah parts count for tube is not so much that
one could wire it point to point , and
it's the iron that'll be the tough [ expensive part ]
still this could be a good chance as mark points out
to make a premo version how about a v76
that is switchable to a v74 ?
Wonder if the 51x psu could handle the heater current
with a dc-dc converter for B+

Those all look very very tasty....
Anyone know what kind of iron is used? Sowter has some correct? What about if people wanted to used different/options?

Biasrocks said:

Or if you're really gonna go the distance, a V76 would be even better.

Click to expand...

This is my all time favorite pre

speaking of NY , maybe
Ed anderson is up for it ?
He's certainly proven capable of producing
the goods so far , guess that depends on his time
and or interest , mignt have to do a prebuy

Biasrocks said:

Or if you're really gonna go the distance, a V76 would be even better.

Click to expand...

better is always better!
with that tube count, a sub for ef86 seems prudent.  pinout dictating layout and all that...

abechap024 said:

Anyone know what kind of iron is used? Sowter has some correct? What about if people wanted to used different/options?

Click to expand...

from a quick skim of an old thread, the output is somewhat trivial in comparison to the input.  1:30 ratio?!?

EDIT: here's the thread for reference.
http://www.groupdiy.com/index.php?topic=6360.0

PCB for V76!!!!

Well, THAT would be something.

Count me in.

Isn't the REDD.47 just modified V72?

I have the solid state version of V76, it's called V376 and it's great....but it's NOT V76 though..