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Old 1st August 2013, 09:34 AM   #1
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Join Date: Jul 2013
Location: Canberra
Default Simple enclosures for valve projects

Hi,

My first post here.

I'm after thoughts on simple DIY enclosures (ie box) for my DIY valve amp projects. This also includes chassis design and construction.

The idea is that I can run the prototype for a few days (weeks/months), make changes if needed, new additions... resolve the design before commiting to a final build.

I can do the high quality woodworking when I need to but there are many prototype / research projects I'd like to where I don't want to cut wood or bend aluminium, or... I think you get it

I'm thinking simple hobby screw construction of plates and channelised aluminium/brass struts (if that exists) on perhaps a mesh.

Is anyone aware of an internet-based supplier of this type of thing?

How do you do your valve/HV prototyping?
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Old 1st August 2013, 03:51 PM   #2
DF96 is online now DF96  England
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Unless your prototype debugging is likely to result in a radical redesign (in which case it could be argued that you didn't think hard enough) the major components are unlikely to change. I make the chassis for the final build, but ensure that there are plenty of spare tag strips for extra components.
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Old 1st August 2013, 05:37 PM   #3
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For a prototype, I use a rear side of a protoboard PCB, look at this fotos.

I expect this can solve easily the question :-D
Attached Images
File Type: jpg Tube SEPIC 01.JPG (152.4 KB, 113 views)
File Type: jpg Tube SEPIC 02.JPG (145.3 KB, 111 views)
File Type: jpg Amplifier 01.JPG (156.0 KB, 111 views)
File Type: jpg Amplifier & SEPIC.JPG (139.6 KB, 111 views)
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Old 2nd August 2013, 08:26 AM   #4
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Thanks Osvaldo for the photos - I see what you mean, though I was somewhat distracted/envious with the size of your power transformer for a while :-)

Whilst that will work in the shed I was looking for some enclosures as well - I may have found most of the components I want:
McJING Tools Online

The T-Track system and the insert rivets may be sufficient for my needs for mocking up some prototypes...

Thanks
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Old 2nd August 2013, 01:30 PM   #5
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Location: Barrio Garay,Almirante Brown, Buenos Aires, Argentina
This power transformer was winded for myself several years ago. I was working in a B&W tube TV when the original catched fire. Then, I was at secondary school (Here called ENET: Escuela Nacional de Educación Técnica, or National school of technicals), when I was at 4Th year (6 in total). It is a lamination 60 and gives 6.3V @10Amper, 220V+220V @250mA and a 6.3V@1A for the EZ80 rectifier. But the final project I'll use self-hand wired toroidal transformers.

Finally, the amplifier surely will be like the AM regenerative receiver at the last 3 photos: chassis made of brass, and components in a card.
Attached Images
File Type: jpg Trafos 01.JPG (144.0 KB, 97 views)
File Type: jpg Trafo 0e.JPG (144.9 KB, 41 views)
File Type: jpg Regen 02.JPG (136.9 KB, 41 views)
File Type: jpg Regen 03.JPG (147.0 KB, 45 views)
File Type: jpg Regen 04.JPG (146.2 KB, 47 views)
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Last edited by Osvaldo de Banfield; 2nd August 2013 at 01:37 PM.
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