[Boatanchors] National SW-3 Coil Forms Wanted
howard holden
holden7471 at msn.com
Thu Sep 1 14:33:43 EDT 2022
Been following this thread with some interest. Last year I picked up what looked to be an SW-3, turned out to be someone’s SW-3 box and dial complete with the rosette knobs. For $10 I knew it wouldn’t be a real SW-3 and it wasn’t. But the box, with what looks to be a fairly unmodified chassis, had been turned into a BC and IF signal generator with modulation. Thoughts on what to do with it? I know there are a number of versions of the SW-3, and my first inclination was to restore it insofar as possible to an SW-3. I have some of the various tubes used, and any I don’t have are But the talk here of the coil forms and sockets availability limits that a wee bit! I DO have a complete RAD-2 coil set in the metal case, which I got from Art Hale W4AWS (SK) for use in a replica Millen Single Signal Superhet RF section – built very close to Millen’s design , so similar coils I have, and I could fashion sockets from bakelite or linen phenolic sheets and receptacles drilled from old socket. What to do?
73, Howie WB2AWQ
Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows
From: Leland Bahr<mailto:w5drc at eastex.net>
Sent: Thursday, September 1, 2022 9:29 AM
To: boatanchors at mailman.qth.net<mailto:boatanchors at mailman.qth.net>
Subject: Re: [Boatanchors] National SW-3 Coil Forms Wanted
Good for you, Bill, in not wanting to highly modify your radio project.
I cannot for the life of me understand how a ham would want to take a 60
year old radio and then add a toaster or bread slicer to it. Guys
wanting to add a digital display or clock are examples. They totally
destroy the experience of using these fine old radios. Or the guys
butchering a radio to add a vernier tuning unit or adding giant out of
place knobs to their radio. That's like buying a model T car and wanting
to install a digital dashboard to it.
Lee, w0vt
On 9/1/2022 11:13 AM, William Cromwell wrote:
> Hi Scott,
>
> There are a lot of reasons besides 'nostalgia' to not modify the
> radios. I was hoping somebody might be ready to sell some surplus
> coils, too. What I have in mind to fabricate would not be mistaken for
> original equipment but would fit the existing sockets. I started on
> that project several years ago but I got sidetracked by family
> matters. I can't find my notes - including measurements of the pins
> and their spacing. I do have all the winding specs from National :) I
> want to get started soon but right now 'the pattern is full'. I have a
> pair of coils that cover 160 meters and one pair of bare forms.
>
> 73,
>
> Bill KU8H
>
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