[Hallicrafters] Re: Hallicrafters Digest, Vol 40, Issue 11

[Joe Bob Brunson]

The bandspread, at least on the S-40 (never had an
S-40A, but I think it is the same) and the S-20R (the
pre-war version) is set up so that 0 is the point
where the bandspread capacitor (excuse me, condenser)
is at minimum capacity.  As the numbers increase, the
capacity increases, and you tune below the set
frequency.  The bandspread should be set for minimum
capacity for proper tracking.  I believe there is some
instruction on the bandspread dial indicating where it
should be set.  If the dial is not at that point when
the capacitor is at minimum capacity (all the fins
unmeshed) then check the adjustment of the dial.

Hope this helps...

WB6FQL


> Hello.
> Having dial tracking issues when aligning the set.
> Concentration on band 1 for now.
> 
> Steps 1-2, I.F. peaked great.
> Skipped steps 3-5 for now. (bands 2-4)
> 
> Step 4:
> If I set dial calibration with bandspread at zero
> (fully closed), per 
> instructions, I have too much spread on the main
> dial and can't get 
> accurate readout (freq reads higher than actual at
> 1500khz end). No 
> amount of tweaking caps 22, 4, 15, and 25 will get
> me accurate 
> spread. I can have accurate readout at only one end
> of the dial.
> 
> If I set dial calibration with bandspread at 100
> instead (fully 
> open), I get proper spread and accurate readout.
> 
> Any ideas?
> 
> Looking for confirmation on the following:
> 
> Do I index the bandspread at 0 or 100 ?
> Closed or open?
> Rotate bandspread knob clockwise, dial spins
> clockwise, and dial 
> numbers get smaller?
> Bandspread, rotated fully clockwise, cap is fully
> meshed, dial is at zero?
> 
> 


__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com