[Hallicrafters] S-40 and S-40A dial string

[Roger D Johnson]

I have a Hallicrafters service bulletin for the S-40A and the dial stringing guide
doesn't show any crossover. At minimum capacity of the bandspread cap, the
dial should be at 0 (zero). This means that the readings increase as you go
lower in frequency. This is counter-intuitive to most people so I suspect many
sets were changed so they "tuned right".

73, Roger


On 5/15/2012 3:11 PM, Richard Knoppow wrote:
>       Some time ago I restored an S-40A. I discovered the
> band spread capacitor rotated in the opposite direction than
> others I've seen and opposite the cap in my S-20R.  In order
> to make the band spread dial run in the right direction it
> was necessary to cross over the cords.  I "fixed" this by
> pulling the stop pin from the cap and reversing it. However,
> while the dial cord now runs as the diagram in the handbooks
> show the band spread dial stops at about 95 instead of going
> to 100.  Of course, it does the same think in my S-20R so
> maybe that's how its supposed to work.
>       A picture of the insides of an S-40 in an old QST seems
> to show the crossed over dial cord.  Its a pretty low
> resolution picture so I can't be sure.  What I would like is
> for those with S-40 and S-40A receivers to have a look
> inside to see which way the band spread capacitor and dial
> string run. What I suspect is that both arrangements were
> used at various times.
>       I asked this before, not sure if on this list, but am
> trying it again.  If the arrangement before I "fixed" it is
> correct I will restore it.
>
>
> --
> Richard Knoppow
> Los Angeles
> WB6KBL
> dickburk at ix.netcom.com
>
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