My Class a vintage version - pics

[peterc]

Finished this version of the classic Neaeve over the weekend. Sounds quite amazing.....

[MD]

Looks lovely, how about some details?
Was this your PCb design and construciton? If not, where did you get it? (7th circle?)
What transformers did you use?
I only see one regulator on the power board: how do you get bi-polar supply and phantom?

And of course, how does it sound?

Congrats.

[Milkmansound]

those look awesome - and I bet you could fit at least 2 more in that case!

the PSU looks like a modified green pre supply - am I right?

and those transformers - good lord, that thing better sound good with iron like that in it!

[r0ck1r0ck2]

BANG!!!
that's something beautiful indeed!

[brianroth]

PeterC, a VERY nice looking unit! How did you do the legending for the front panel?

MD, the "classic" Neves only require single-ended 24VDC. I also didn;t see a third, center-tap coming from that power transformer, making it almost certain it is a single-ended supply. I'm also *guessing* that the phantom is done via a voltage doubler or tripler.

Bri

[matta]

Hey Brian,

I'll answer on behalf of Peter since he is the one who gave me the heads up
on how to do it for a panel I did for a Buss Compressor I was working on.

It is done with a transfer paper known as Fotocal paper here in South Africa,
but the commercial name for it in the US/UK is Lazertran.

Basically you print onto the paper either via a Laser printer/copier
(reversed) and then bake it onto the metal using a convection oven.

As you can see on Pete's you are left with a residue around the fused
lettering, but this can be removed with surgical spirits (not sure if it has
the same name in the USA. I think you might call it rubbing alcohol?), this
removes the residue but leave the ink behind because it fuses/bonds to the
metal under heat.

Here is close up of my compressor to illustrate this.



The cool thing is if you have access to a colour laser printer you can print
any colour under the sun onto the paper for transfer.

Back to the Neves....

You are right about the voltage doubler into a LM317 regulating the 48V rail
(I've built a few of Peter's PSU's so had LOTS of experience), but I'm
wondering where the regulator for the +24V rail is?

Pete, you never cease to amaze me and I think it looks killer! Well done my
friend!

Cheers

Matt

[peterc]

Phew, thanks for all the good words!

Looks lovely, how about some details?
Was this your PCb design and construciton? If not, where did you get it? (7th circle?) What transformers did you use? I only see one regulator on the power board: how do you get bi-polar supply and phantom?
And of course, how does it sound?

PCB is my own design, the transformers are original Marinairs I got from a friend, the supply is a Green supply modded for +24v & +48v (via voltage doubler).
They do sound quite amazing

those look awesome - and I bet you could fit at least 2 more in that case!

I do build them to order, the case is designed to take 4 channels. I might evolve the design to make a 4 chan PCB with attached PSU for a single PCB solution.

Lazertran is really nice, very strong & hard to split, unlike some of the other decal papers. Printing light colours onto a dark panel does not work that well, the colours are just not dense enough. Matt's trick with rubbing alchohol looks good, I couldnt try it with these units because of the powder coated panel, but when I get the unit back I'll try it on the inside of the panel.

Regards
Peter