[R-390] Painting Knobs

[Jordan Arndt]

Thanks for those posts guys...I thought I remembered that at least some of 
the knobs I had done in years gone by had yellow primer. It's whats on the 
inside of of the  frequency dial cover. IIRC...

FWIW, I had good luck with heating the knobs to ~300F before applying the 
primer, then checking for coverage voids and then baking the primer on at 
300F for 30 minutes, then repeat for the color coat. I believe I used an 
automotive primer for zinc plated parts.

73...Jordan VE6ZT


----- Original Message ----- 
From: "Les Locklear" <leslocklear at hotmail.com>
To: "Jacques Fortin" <jacques.f at videotron.ca>; "'Barry'" <n4buq at knology.net>
Cc: "'R-390 Mailing List'" <r-390 at mailman.qth.net>
Sent: Friday, August 16, 2024 1:36 PM
Subject: Re: [R-390] Painting Knobs


Like a lot of things, it has probably been banned. Many years ago, when I 
was a service manager for an automotive dealership we used it to combat 
corrosion problems on battery terminal posts. Clean them, spray with zinc 
chromate primer…end of problem. Most of the R-390’s I’ve seen have yellow 
( zinc chromate primer) as a base for painted parts. The batteries these 
days don’t seem to have the same problems. Hey, I’m old this was over 50 
years ago in the early 70’s. I still have a rattle can of it. Does it work? 
I don’t have a clue or an R-390 series receiver anymore. I just read for 
memories from old friends.

Les Locklear

Sent from my iPad
________________________________
From: Jacques Fortin <jacques.f at videotron.ca>
Sent: Friday, August 16, 2024 2:25:23 PM
To: 'Les Locklear' <leslocklear at hotmail.com>; 'Barry' <n4buq at knology.net>
Cc: 'R-390 Mailing List' <r-390 at mailman.qth.net>
Subject: RE: [R-390] Painting Knobs

Yep, it was the name of the yellow stuff that can be found years ago.
Does not seems to be available anymore on this side of the border however...

73, Jacques, VE2JFE in Montreal

Zinc Chromate Primer. It's available in rattle cans.
Les Locklear

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