[R-390] EXT: Re: Painting Knobs

Sat Aug 17 19:45:14 EDT 2024

I didn't think to check with boat shops.  Perhaps we have one near here and
can avoid the high shipping costs.

Thanks,
Barry - N4BUQ

On Sat, Aug 17, 2024 at 3:28 PM Cecil acuff <chacuff at gmail.com> wrote:

> I’ve done this a few times and it works well for me.
>
> I’ve had all the knobs glass bead blasted to strip them and provide a bit
> of “tooth” for the paint to adhere.
>
> I have sprayed all knobs with Tempo brand marine Zinc Chromate primer.
>
> Available at most boat dealers service shops.
>
> I let that cure naturally for a couple weeks.  You will know when it’s
> cured as it will develop a feel that it’s no longer still drying.  A slick
> feel that indicates it cured.
>
>  I then spray with my satin topcoat…Krylon or Rustoleum…your choice.
>
> I let that cure for a couple weeks and you are good to go.
>
> Very durable finish.
>
> Cecil
>
>
> Sent from my iPad
>
> > On Aug 17, 2024, at 2:37 PM, Fisch, Michael <mfisch at kent.edu> wrote:
> >
> > Hi,
> > I had an old can of zinc primer I used when I redid my 390a 15 yeras
> ago.  It is by TEMPO and it was a marine paint, but they have others.
> > Search tempo primer.  Or is it a different primer?
> >
> > Michael Fisch
> > AC8PD
> > ________________________________
> > From: r-390-bounces at mailman.qth.net <r-390-bounces at mailman.qth.net> on
> behalf of Jordan Arndt <Outposter30 at shaw.ca>
> > Sent: Friday, August 16, 2024 4:53 PM
> > To: Les Locklear <leslocklear at hotmail.com>; Jacques Fortin <
> jacques.f at videotron.ca>; 'Barry' <n4buq at knology.net>
> > Cc: 'R-390 Mailing List' <r-390 at mailman.qth.net>
> > Subject: EXT: Re: [R-390] Painting Knobs
> >
> > 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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