[ARC5] The value of MO and PA tank components.

[Tim]

Hi Neil - sounds like a similar story on my end - 1961 ARRL Handbook
"Conversion" of a 5.3 - 7 mc set.

Just curious how you and the VK's found the local "surplus scene" back
then.  Was there good availability of WWII gear in your local areas?
73, Tim
N6CC

On Thu, Mar 24, 2016 at 1:13 AM, AKLDGUY . <neilb0627 at gmail.com> wrote:

> > I have a question.  Why did you adjust the tuning CAPACITOR to bring the
> > frequency down?
>
> Because I was just a 17 year old kid in 1967, although I had
> avidly read everything I could find on the ARC-5 transmitters,
> such as the article in the 1963 ARRL Handbook and the CQ
> Surplus manuals. I was pretty well-read on them, but articles
> at the time said, "don't play with the slugs, you'll mess up the
> tracking".
>
> In those days we didn't have the internet to look things up.
> I didn't have a manual. I had little idea of how the slugs
> interacted with the padder settings to set not only the
> frequency but the end-to-end bandspread.
>
> I don't think I ever recalibrated the dial. In those days, one
> tuned up and down the band listening for a CQ, and then
> quickly netted the VFO to that frequency before someone
> else beat you to it and made contact. Or, you tuned
> around to find a vacant frequency (quite difficult in those
> days! the band was full every evening - yes, even here in
> ZL) and then netted your VFO to it and began calling CQ.
> The dial reading was irrelevant, except as a hint as to
> whether I should tune up the band or down the band to net.
>
> So I had no need to recalibrate the dial and therefore no
> need to set the bandspread to make the coverage conform
> to dial markings. I assumed that if the slugs were good for
> 4.0 - 5.3 Mc/s, they would stay in track if I moved everything
> down with the two padders.
>
> And so it proved to be. I operated from 3500-3900 KHz and
> the plate current stayed dipped all the way. I never had to
> extend the PA padder shaft out through the side wall to
> allow dipping when changing frequency.
>
> 73 de Neil ZL1ANM
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