Dieselpunk Preamp of Doom and the Beast with Two Backs

What people are working on at the moment
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IslandPink
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#76 Re: Dieselpunk Preamp of Doom and the Beast with Two Backs

Post by IslandPink »

Very nice - I bet you savoured the unpacking ?
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Thermionic Idler
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#77 Re: Dieselpunk Preamp of Doom and the Beast with Two Backs

Post by Thermionic Idler »

Scared witless if I'm honest, I've not yet unwrapped anything else, just sipping a coffee at the moment. This was not a cheap thing to get made and I'm terrified that I made a mistake somewhere in the spec which would mean an expensive re-make - even though I checked and double checked and then checked again just for good measure.
Deck: Garrard 301 - Audio Origami PU7 - NW Analogue DH3S
Phono: Pete Millett LR, Lundahl SUT, AMB σ22 PSU
Linestage: Bruno Putzeys Balanced Pre + Hans Polak relay mod, LCDuino control
Power amps: 300B PP 'Symmetric Reichert'
Speakers: FF225WK Big Mets
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#78 Re: Dieselpunk Preamp of Doom and the Beast with Two Backs

Post by Thermionic Idler »

Phew Number 1 - the perspex window fits its cavity perfectly - this is the rear of the front panel showing the threaded attachment holes. Also I had to thin the panel out around the push-switch as it had a specified maximum panel thickness of 3mm.

Let's just hope I've lined everything up correctly on the main chassis panels, watch this space....

Image
Deck: Garrard 301 - Audio Origami PU7 - NW Analogue DH3S
Phono: Pete Millett LR, Lundahl SUT, AMB σ22 PSU
Linestage: Bruno Putzeys Balanced Pre + Hans Polak relay mod, LCDuino control
Power amps: 300B PP 'Symmetric Reichert'
Speakers: FF225WK Big Mets
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#79 Re: Dieselpunk Preamp of Doom and the Beast with Two Backs

Post by Cressy Snr »

:happy1:
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#80 Re: Dieselpunk Preamp of Doom and the Beast with Two Backs

Post by Thermionic Idler »

So I've lined up the front panel against the main base panel (photo below) and everything seems to line up perfectly.

So far all looks good. Before I bend it into a U shape (there are notches cut out on the other side to facilitate this) I need to sand off the paint around some of the holes to allow conductivity to the chassis. Decided to get a Dremel to do this, it'll be a handy thing to have anyway.

Image
Deck: Garrard 301 - Audio Origami PU7 - NW Analogue DH3S
Phono: Pete Millett LR, Lundahl SUT, AMB σ22 PSU
Linestage: Bruno Putzeys Balanced Pre + Hans Polak relay mod, LCDuino control
Power amps: 300B PP 'Symmetric Reichert'
Speakers: FF225WK Big Mets
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#81 Re: Dieselpunk Preamp of Doom and the Beast with Two Backs

Post by Ant »

that looks like it will be a stunner when its built dave!
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#82 Re: Dieselpunk Preamp of Doom and the Beast with Two Backs

Post by IslandPink »

Cor look at all those input sockets !
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#83 Re: Dieselpunk Preamp of Doom and the Beast with Two Backs

Post by Mike H »

Is it really necessary to remove paint, is there not conductivity on the reverse plain side? Or you could contrive to get it from there?

Otherwise looking top hole. Aka shoddy. :D
 
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#84 Re: Dieselpunk Preamp of Doom and the Beast with Two Backs

Post by Thermionic Idler »

IslandPink wrote: Sat Sep 23, 2017 6:07 pm Cor look at all those input sockets !
6 in (4x unbalanced + 2x balanced) and 2 out (balanced and unbalanced). All Neutrik so I can change the configuration reasonably easily in the future if I need to (unbalanced to balanced etc). As it stands I have way more inputs than I actually need.

I can even change it to 5 in 3 out if I wanted, although I'd have to change out a couple of components on the boards. It's a pretty flexible system.
Deck: Garrard 301 - Audio Origami PU7 - NW Analogue DH3S
Phono: Pete Millett LR, Lundahl SUT, AMB σ22 PSU
Linestage: Bruno Putzeys Balanced Pre + Hans Polak relay mod, LCDuino control
Power amps: 300B PP 'Symmetric Reichert'
Speakers: FF225WK Big Mets
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#85 Re: Dieselpunk Preamp of Doom and the Beast with Two Backs

Post by Thermionic Idler »

Mike H wrote: Sun Sep 24, 2017 11:52 am Is it really necessary to remove paint, is there not conductivity on the reverse plain side? Or you could contrive to get it from there?

Otherwise looking top hole. Aka shoddy. :D
It's painted on both sides.
Deck: Garrard 301 - Audio Origami PU7 - NW Analogue DH3S
Phono: Pete Millett LR, Lundahl SUT, AMB σ22 PSU
Linestage: Bruno Putzeys Balanced Pre + Hans Polak relay mod, LCDuino control
Power amps: 300B PP 'Symmetric Reichert'
Speakers: FF225WK Big Mets
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#86 Re: Dieselpunk Preamp of Doom and the Beast with Two Backs

Post by Ray P »

Thermionic Idler wrote: Sun Sep 24, 2017 11:55 am It's painted on both sides.
Isn't bending it going to crack the paint?

I would have been tempted to use FPE's bending service and then get the paint (powder coat?) applied afterwards

http://www.schaeffer-ag.de/en/products/a_z/#item
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#87 Re: Dieselpunk Preamp of Doom and the Beast with Two Backs

Post by Thermionic Idler »

Ray P wrote: Mon Sep 25, 2017 8:43 am
Thermionic Idler wrote: Sun Sep 24, 2017 11:55 am It's painted on both sides.
Isn't bending it going to crack the paint?

I would have been tempted to use FPE's bending service and then get the paint (powder coat?) applied afterwards

http://www.schaeffer-ag.de/en/products/a_z/#item
That will potentially be an issue, yes - the Skaarhoj guy touched on it in his videos.

The bottom panel with all the cutouts is powder-coated (as I needed the cavity around the remote sensor to be black) but the lid is anodised, to be more hard wearing against the inevitable pile of CD cases that will stack up on it when in the rack!

The outer surface of the bends in the bottom panel won't be visible - the one at the front will be behind the front panel, with the other being at the back on the bottom rear corner, so not critical. In fact I want to see how the powder coating behaves for this as that will inform what I do with the panels for the power amplifier.

The outer surface of the anodised top panel will be more visible - if the paint does crack it's easy enough to go along the edge with one of those matt black touch up pens I reckon.
Deck: Garrard 301 - Audio Origami PU7 - NW Analogue DH3S
Phono: Pete Millett LR, Lundahl SUT, AMB σ22 PSU
Linestage: Bruno Putzeys Balanced Pre + Hans Polak relay mod, LCDuino control
Power amps: 300B PP 'Symmetric Reichert'
Speakers: FF225WK Big Mets
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#88 Re: Dieselpunk Preamp of Doom and the Beast with Two Backs

Post by jack »

Thermionic Idler wrote: Sat Sep 23, 2017 5:26 pm So I've lined up the front panel against the main base panel (photo below) and everything seems to line up perfectly.

So far all looks good. Before I bend it into a U shape (there are notches cut out on the other side to facilitate this) I need to sand off the paint around some of the holes to allow conductivity to the chassis. Decided to get a Dremel to do this, it'll be a handy thing to have anyway.
Two ways to do that I've used - a shaped dremel stone so that you can put the shaft in the hole and abrade a neat circle round it, or use a toothed lock washed to cut through the paint (same as used on anodised aluminium).
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#89 Re: Dieselpunk Preamp of Doom and the Beast with Two Backs

Post by Thermionic Idler »

All the bending is now done successfully - thanks to Mike for the tip re the G clamps and angle - the anodised surfaces coped better than the powder coated ones so that's a good point of reference.

Fitted all the I/O sockets this evening, more to do tomorrow, will post pics when I get them.
Deck: Garrard 301 - Audio Origami PU7 - NW Analogue DH3S
Phono: Pete Millett LR, Lundahl SUT, AMB σ22 PSU
Linestage: Bruno Putzeys Balanced Pre + Hans Polak relay mod, LCDuino control
Power amps: 300B PP 'Symmetric Reichert'
Speakers: FF225WK Big Mets
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#90 Re: Dieselpunk Preamp of Doom and the Beast with Two Backs

Post by jack »

Think of the context - anodising is part of the metal itself - it's an oxide layer, it'll flex with the rest of the metal. Paint, OTOH, is just stuck on and could go anywhere...

I love anodised finishes - not too tricky to do at home either.
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