[ARC5] T22 transmitter

[Bob Groh]

Ken, wonderful documents.  Almost makes me wish I had saved my ARC-5
transmitter!  Anything similar on the ARC-5 receivers?

73, Bob Groh, WA2CKY

On Fri, Feb 7, 2020 at 11:35 AM Kenneth G. Gordon <kgordon2006 at frontier.com>
wrote:

> Peter:
>
> I would strongly suggest you read these two PDFs which I have stored on my
> website:
>
> http://www.w7ekb.com/glowbugs/Military/DaveStinsonARC-5Article.pdf
>
> and
>
> http://www.w7ekb.com/glowbugs/Military/DaveStinsonARC5Info.pdf
>
> Ken W7EKB
>
> On 7 Feb 2020 at 6:41, David Stinson wrote:
>
> > Good Morning, Peter.
> > I believe the work has been done, but I don't remember where
> > may have seen it.  Frankly, I consider it "over-thinking the problem."
> > I've run the rigs into spectrum analysers using the series-cap
> > and found them very clean.  I don't think going to a more complex
> > solution will yield a meaningful improvement.
> > However- "each to his own" of course.
> >
> > There is an active, long-standing "ARC-5" email reflector
> > at arc5 at mailman.qth.net with some excellent people.
> > For a broader milradio group, there are:
> >
> > milsurplus at mailman.qth.net
> > MMRCG at groups.io
> >
> > GL OM ES 73 DE Dave AB5S
> >
> > On 2/5/2020 9:35 AM, Peter Bertini wrote:
> > > Hello Dave
> > >
> > > Has anyone ever come up with a more precise estimate for the T22
> > > transmitter antenna impedance?
> > >
> > > I have one that looks like it just left the factory, and I intend to
> > > get it on the air using you suggestions
> > > to keep it original.  It is an extremely nice black wrinkle painted
> > > original,  with a lot of red factory labels.
> > > I have to research its age and lineage.
> > >
> > > I've read the advice concerning a series cap to cancel the rotary
> > > inductor and link inductance... however
> > > I suspect it would also be easy to tack in two high voltage micas to
> > > convert the rotary inductor into
> > > a Pi matching network, which should give a better matching range and
> > > better harmonic suppression.
> > > The caps could be easily removed by a purist in the future without
> > > affecting its value as an artifact.
> > >
> > > I am also looking for parts from junkers to restore several other
> > > transmitters and receivers, are they any
> > > groups that cater to ARC-5 fanatics?
> > >
> > > Any thoughts?
> > >
> > > Peter W1BR
> > ______________________________________________________________
> > ARC5 mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/arc5
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:ARC5 at mailman.qth.net
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: https://www.qsl.net/donate.html
>
>
> ______________________________________________________________
> ARC5 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/arc5
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:ARC5 at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: https://www.qsl.net/donate.html
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/arc5/attachments/20200207/c6e55ae7/attachment.html>