[Hallicrafters] SX-101A Dial Adjustment Help

[E. Jerold Forwood]

Ray,
I happen to have an SX-101 and I know what he's talking about.  I use it
with my Johnson Ranger on the AM Window frequencies all the time.  The
Dial Pointer reset knob does just that, it moves the pointer left and
right much more on 20 Meters than 200 KHz's.  It will also allow
compensation for much more than the 60 KHz's that he indicated it was
off.  

Why make things so complicated when it doesn't need be?

If you center the adjustment on the correct position, and you only need
to use the 100 KHz calibrator right on the front panel to find the
correct position, you will have plenty of adjustment to move the pointer
more than the 60 KHz. he  indicated it was off (14,200 from 14,260 is 60
according to my math).  The Manual describes this procedure.

Frankly you can't read closer than 10 to 20 KHz on the dial any way. 
It's not a digital readout, it's a slide rule dial from the 50's / 60's
era.  Way back when I got my first Ham Ticket, KN9AIB.

To use the receiver you tune for a signal within a range, not for a
specific frequency.  You then zero beat a separate transmitter against
the signal on the receiver.  You couldn't tell anyone what frequency you
are on within 10 KHz unless you have a separate frequency counter in the
shack!  That's why you had to be careful, in the old days, to stay at
least 5 KHz.  away from the band edges.  You never knew is you were truly
inside of where you were supposed to be!

Well enough of this.  Just remember, It's a HOBBY!  It's not Rocket
Science!!  Have fun with it!!!

73's de Jerry, KØEJF


On Mon, 10 Mar 2003 13:57:17 -0500 "Ray V." <w2ec at attglobal.net> writes:
> Jerry,
> 
> Frank's note seemed to indicate that 14,200kc actually was 14,260kc, 
> the 
> implication being that he couldn't adjust the dial pointer to 
> correctly 
> point to 14,260. Physically moving the pointer might seem to work in 
> the 
> middle of the band, however consider this: turn the main dial tuning 
> to 
> the far left of the scale, i.e. now the dial is pointing at 
> 14,000kc, 
> the far left, but based on what Frank said, his receiver will be 
> receiving 14,060, not 14,000. Now if he just physically moves the 
> pointer on the string to 14,060, he is limited to a low frequency of 
> 
> 14,060 as the main dial is already far left, he can't turn it any 
> further left to bring the dial pointer back to 14,000 if it has been 
> 
> physically moved to the right. This means a realignment is needed so 
> 
> that the far left is really 14,000, not 14,060. Moving the dial 
> pointer 
> in this case is masking the problem and limiting the frequency 
> coverage 
> of his receiver to 14,060 and up.
> 
> 73, Ray  W2EC
> 
> E. Jerold Forwood wrote:
> 
> > Frank,
> > Just Move the pointer's position on the dial string so that it's 
> position
> > is centered on the desired freq. while the pointer adjustment is 
> in the
> > center of it's travel.  Why go through all the trouble to realign 
> the
> > entire receiver when it's that easy?  Unless, of course you have 
> the
> > proper equipment, the knowledge, and the time. But then you may 
> find that
> > you will still have to move the pointer's position anyway!
> > The pointer is not that hard to get to and you can clean the 
> inside of
> > the glass in front of the dial at the same time.  You may also 
> find that
> > the dial cord is frayed and needs replacing.
> > Just my $0.02!
> > 73's de Jerry, KØEJF
> > 
> >
> 
> 
> 
> 


E. Jerold (Jerry) Forwood