UK Vintage Radio Repair and Restoration Powered By Google Custom Search Vintage Radio Service Data

Go Back   UK Vintage Radio Repair and Restoration Discussion Forum > Specific Vintage Equipment > Vintage Amateur and Military Radio

Notices

Vintage Amateur and Military Radio Amateur/military receivers and transmitters, morse, and any other related vintage comms equipment.

Closed Thread
 
Thread Tools
Old 3rd Feb 2019, 7:55 pm   #1
g4wim_tim
Tetrode
 
Join Date: Nov 2018
Location: Freckleton, Lancashire, UK.
Posts: 88
Default To paint or not to paint ?

For those of you following my home brew build for 160, 80 and 60 mtrs - it's finished all but for the case painting to match the front panel.

Question is do I really want to powder coat the case black to match the front panel or should I just leave it bare aluminium showing a few scribe marks and scratches ?

Powder coating would cover up the blemishes, but would also make the ventilation holes less effective likely reducing the hole diameter from 3mm down to about 2.5mm

Plus powder coating would make it look like just one big black box.

I'm open to being convinced either way - currently I'm leaning toward leaving the case 'naked'.

Regards Tim
Attached Thumbnails
Click image for larger version

Name:	IMG-0242.jpg
Views:	315
Size:	96.1 KB
ID:	177672   Click image for larger version

Name:	IMG-0243.jpg
Views:	263
Size:	97.4 KB
ID:	177673   Click image for larger version

Name:	IMG-0245.jpg
Views:	243
Size:	138.1 KB
ID:	177674  
__________________
Building and tinkering for over 50 years, from 807's to digital amateur TV.
g4wim_tim is online now  
Old 3rd Feb 2019, 8:10 pm   #2
g4aaw pete
Hexode
 
g4aaw pete's Avatar
 
Join Date: Jan 2008
Location: Maidstone, Kent, UK.
Posts: 427
Default Re: To paint or not to paint ?

Naked works for me, Tim

But, what a terrific looking pice of equipment!
__________________
Regards
Pete
g4aaw pete is offline  
Old 3rd Feb 2019, 8:17 pm   #3
HamishBoxer
Dekatron
 
HamishBoxer's Avatar
 
Join Date: Aug 2007
Location: W.Butterwick, near Doncaster UK.
Posts: 6,771
Default Re: To paint or not to paint ?

Looks superb as it is now.
__________________
G8JET BVWS Member and V.M.A.R.S
HamishBoxer is offline  
Old 3rd Feb 2019, 8:27 pm   #4
G4YVM David
Heptode
 
G4YVM David's Avatar
 
Join Date: May 2014
Location: Salisbury, Wiltshire, UK.
Posts: 823
Default Re: To paint or not to paint ?

Sorry...i say powder coat. It eithrr looks unfinished or something from a very expensive 'avante gard' dealership. To me it's unfinished. But it IS a remarkable job!
__________________
David, G4YVM.
G4YVM David is offline  
Old 3rd Feb 2019, 8:34 pm   #5
David G4EBT
Dekatron
 
David G4EBT's Avatar
 
Join Date: Feb 2003
Location: Cottingham, East Yorkshire, UK.
Posts: 3,672
Default Re: To paint or not to paint ?

Like you Tim, I've been a keen home-brewer since the mid 1950s, and I've never tried to emulate commercially made equipment, because we don't have the resources to do that, and we'll always fall short. The benchmark I've always used is to try to attain the highest homebrew standards within the limit of my skills and resources, and to never make anything that I'd be embarrassed to take the cover off.

Using that benchmark, what you've designed and built is superb - the 'real deal'. Perverse as it may sound, I think if you were to powder coat it, would actually detract rather than enhance the appearance. It would look more 'Panda Cub' and less 'G4WIM', if that makes any sense.

Wonderful to know that while home-brew amateur radio is in inexorable decline, it's not yet extinct!
__________________
David.
BVWS Member.
G-QRP Club member 1339.
David G4EBT is online now  
Old 3rd Feb 2019, 8:37 pm   #6
G6Tanuki
Dekatron
 
G6Tanuki's Avatar
 
Join Date: Apr 2012
Location: Wiltshire, UK.
Posts: 7,409
Default Re: To paint or not to paint ?

If you do paint/powder it remember to put some masking-tape along the faces where the grilles attach to the plates, and along the faces of the plates where they're screwed to each-other. You wouldn't want to go and destroy all that nice screening by an insulating layer between the parts.

Personally I'd go for black wrinkle-finish as found on 1940s HROs etc.
G6Tanuki is online now  
Old 3rd Feb 2019, 8:52 pm   #7
Sean Williams
Dekatron
 
Sean Williams's Avatar
 
Join Date: Feb 2005
Location: St.Ippolyts, Hitchin, Hertfordshire QRA IO91UW
Posts: 3,367
Default Re: To paint or not to paint ?

How about powder coat the frame, and get the mesh anodised - would look very smart, and not reduce the diameter of the holes by a measureable amount?
__________________
Engineers make things work and have spare bits when finished
Sean Williams is online now  
Old 3rd Feb 2019, 11:51 pm   #8
Radio Wrangler
Dekatron
 
Radio Wrangler's Avatar
 
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 12,233
Default Re: To paint or not to paint ?

Why assume black for powdercoating?

A grey would look rather professional

David
__________________
Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done
Radio Wrangler is offline  
Old 4th Feb 2019, 12:24 am   #9
yesnaby
Octode
 
yesnaby's Avatar
 
Join Date: Jul 2005
Location: Newport, Gwent, UK.
Posts: 1,479
Default Re: To paint or not to paint ?

I like it the way it is. But down the line the aluminium might not look so good after a few years. Difficult one!
yesnaby is online now  
Old 4th Feb 2019, 8:39 am   #10
Radio Wrangler
Dekatron
 
Radio Wrangler's Avatar
 
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 12,233
Default Re: To paint or not to paint ?

There is, of course, the problem of getting paint to stay on aluminium. It needs either etch-primers or else Alochrome treatment.

David
__________________
Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done
Radio Wrangler is offline  
Old 4th Feb 2019, 8:51 am   #11
Ted Kendall
Octode
 
Join Date: Jul 2008
Location: Kington, Herefordshire, UK.
Posts: 1,558
Default Re: To paint or not to paint ?

Don't mess with it - it's fine as it stands, and well fit for purpose.
Ted Kendall is online now  
Old 4th Feb 2019, 11:01 am   #12
Sparky67
Hexode
 
Sparky67's Avatar
 
Join Date: Feb 2008
Location: Great Barr, Birmingham, West Midlands, UK.
Posts: 259
Default Re: To paint or not to paint ?

It's obviously very subjective, but personally I think I would go for a light grey or silver (satin?) finish Tim. That would make it look 'finished' and cover any marks, and provide a contrast with the excellent front panel.

Martin
G4NCE
Sparky67 is offline  
Old 4th Feb 2019, 11:01 am   #13
RobinBirch
Hexode
 
RobinBirch's Avatar
 
Join Date: Apr 2003
Location: Cotswolds, UK.
Posts: 463
Default Re: To paint or not to paint ?

Ooooh that's well done. How about seeing if you can get the aluminium anodised. Then you can pick a nice colour including a bare one so it would look similar to how it does.

Failing that - etch prime and then spray. All available from Halfords and it wouldn't close the holes. Always quite liked a colour with bare metal fasteners.

Robin
G5HI
RobinBirch is offline  
Old 4th Feb 2019, 11:56 am   #14
GW3OQK Andrew
Pentode
 
GW3OQK Andrew's Avatar
 
Join Date: Apr 2011
Location: Swansea, Wales, UK.
Posts: 115
Default Re: To paint or not to paint ?

Excellent job Tim.

Just taking the smooth finish off the aluminium in a caustic soda solution is good. It leaves it matt finish. (I wonder if someone will bother pointing out the hazards.)
73, Andrew
GW3OQK Andrew is offline  
Old 4th Feb 2019, 2:38 pm   #15
Bazz4CQJ
Nonode
 
Bazz4CQJ's Avatar
 
Join Date: Apr 2009
Location: Oxfordshire, UK.
Posts: 2,451
Default Re: To paint or not to paint ?

One question that's hard to answer is that of how that surface will age; will it stay much the same or could it start to look less appealing?

I'm not a fan of powder coating. As, suggested, anodising could be good. As for paints, I had some really good results on aluminium using an etch primer from a company called Clostermann and would certainly use them again.

I think that one big advantage of painting is that if you don't like what you end up with, or it gets damaged, then it is easy to re-work. That is less true of powder coating or anodising.

Nice job!

B
__________________
We know there are known unknowns. But there are unknown unknowns ones we don't know we don't know.
Bazz4CQJ is offline  
Old 4th Feb 2019, 3:05 pm   #16
Andrew Mawson
Triode
 
Join Date: Feb 2019
Location: Battle, East Sussex, UK.
Posts: 22
Default Re: To paint or not to paint ?

Give the aluminium a good clean up and then get it anodised. It will then remain tarnish free and be significantly less liable to scratching.

Personally I'd clear anodise it, but there is a whole of colours to choose if you wish.
Andrew Mawson is offline  
Old 4th Feb 2019, 4:35 pm   #17
G4XWDJim
Octode
 
G4XWDJim's Avatar
 
Join Date: Oct 2008
Location: Littlehampton, West Sussex, UK.
Posts: 1,254
Default Re: To paint or not to paint ?

Id go with post 14 and then clear lacquer.

Jim
G4XWDJim is online now  
Old 4th Feb 2019, 7:47 pm   #18
g4wim_tim
Tetrode
 
Join Date: Nov 2018
Location: Freckleton, Lancashire, UK.
Posts: 88
Default Re: To paint or not to paint ?

Hi guys,

certainly given me some ideas and questions.
I think powder coating the frame and anodising the mesh as Sean suggests in post #7 is a good option.

However not sure about how or where to get the mesh anodised. I guess I could leave it naked and let it naturally anodise.

But if I were to anodise the mesh then there'd be issues with its connectivity / screening.
Maybe clear lacquer on the mesh would be a better idea ?

Regards Tim
__________________
Building and tinkering for over 50 years, from 807's to digital amateur TV.
g4wim_tim is online now  
Old 5th Feb 2019, 3:12 am   #19
Argus25
Nonode
 
Argus25's Avatar
 
Join Date: Oct 2016
Location: Maroochydore, Queensland, Australia.
Posts: 2,206
Default Re: To paint or not to paint ?

There is another way and you can do it yourself without having to turn it over to the powder coaters and get a coat that is too thick.

Recently I had a large aluminium chassis to paint. (see page about 32 of this article: http://worldphaco.com/uploads/ARGUS.pdf ).

The trick is to ensure two things, that the aluminium is treated with Alodine or similar (used in the aviation industry to prime aluminium, it leaves it with a matt yellow finish) and that you use a high temperature enamel paint that you can bake in your own home oven, I used VHT machinery grey spray paint.

The result is great, exactly like a commercial finish and scratch resistant with good adhesion thanks to the primer.

Anodizing can look fantastic when new, but when scratched it is a cosmetic nightmare and does not lend itself well to touch up repairs, unlike paint.

PS: very cool transmitter.

Last edited by Argus25; 5th Feb 2019 at 3:17 am.
Argus25 is offline  
Old 5th Feb 2019, 8:59 am   #20
G4YVM David
Heptode
 
G4YVM David's Avatar
 
Join Date: May 2014
Location: Salisbury, Wiltshire, UK.
Posts: 823
Default Re: To paint or not to paint ?

Quote:
Originally Posted by g4wim_tim View Post
Hi guys,

But if I were to anodise the mesh then there'd be issues with its connectivity / screening.
Maybe clear lacquer on the mesh would be a better idea ?

Regards Tim
Why? Anodised metal still conducts. It does on my landrover anyway. You can also get coloured anodising. They are dull colours, but still.colours.
__________________
David, G4YVM.
G4YVM David is offline  
Closed Thread

Thread Tools



All times are GMT +1. The time now is 8:00 pm.


All information and advice on this forum is subject to the WARNING AND DISCLAIMER located at https://www.vintage-radio.net/rules.html.
Failure to heed this warning may result in death or serious injury to yourself and/or others.


Powered by vBulletin®
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Copyright ©2002 - 2019, Paul Stenning.