[ARC5] ARC-5 T-20 Frequency coverage and other questions

[AKLDGUY .]

I can't now remember, it was so long ago.
I have a vague idea I may have set 3.5 MHz as 4.5 on the dial.

73 de Neil ZL1ANM


On Thu, Jul 31, 2014 at 3:18 PM, J Mcvey <ac2eu at yahoo.com> wrote:

> I have one of those transmitters in pristine condition. I knew that
> resetting the MO and final bandset caps was possible, but by how much? I
> was thinking if I could bring it down exactly 1 MHZ then that would be an
> easy interpolation on the original dial. Will it go down that far ?
>
>
>   On Wednesday, July 30, 2014 10:22 PM, AKLDGUY . <neilb0627 at gmail.com>
> wrote:
>
>
> Many decades ago I shifted a T-20 (4-5.3 Mc/s) to the 80m band simply by
> unlocking and resetting the VFO and PA bandset capacitors.
>
> I'm almost certain that allowed coverage of the entire CW portion, because
> IIRC that was my first ARC-5 transmitter and I had it ready to go on the
> day my ticket arrived in the mail and worked Russ ZL4JW on CW the same
> night (27 October 1967). I was at North Shore, Auckland and he was at
> Omarama near Dunedin. Still have the original log book.
>
> Can only suggest you try resetting those bandset capacitors before
> attempting any "recommended" mods.
>
> 73 de Neil ZL1ANM
>
>
> On Thu, Jul 31, 2014 at 9:10 AM, Andrew Kopke <andrewkopke at rocketmail.com>
> wrote:
>
> > Hello all, I'm new to the group and a new owner of a ARC-5 T-20
> >
> > After doing some reading on line ,It appears as though this model could
> > cover the 80 meter band mentioned in one of the conversion manuals ( I
> > think it was "Command Sets" published by CQ ) Anyway, That mod mentions
> > adding a capacitor somewhere . There is another modification that
> involves
> > C-60 and, making the plates of that capacitor fully meshed. I took the
> > cover off and sure enough the paint seals were broken and the capacitor
> was
> > closed.
> >
> > I haven't even begun building the power supply as of yet . I do have  a
> > 24v dc 2.5 amp supply.
> > I have alot of questions to follow ,but my first question is :does anyone
> > know if this transmitter will cover the bottom CW portion of the 80 meter
> > band with the plates of C-60 closed?  I don't see any other modifications
> > done. I washed the set in the sink with dawn and rinsed with distilled
> > water  unfortuately, I washed off the white ink behind the plastic window
> > of the roller inductor scale ,but can still see the number scale engraved
> > in the plastic. I suppose I could just get a white paint marker and re-
> do
> > it . Any thoughts?
> >
> > Thanks for any insight,
> >
> > Andrew Kopke
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