[Hallicrafters] SX-71 Restoration update

[Philip Atchley]

Hi,

I've seen this on a couple of receivers in years past.  One of the first 
things that I do when working on a radio is open the tuning capacitor plates 
all the way and see if the pointer is at the high end of the scale.

Now, having said that.  Just a month or two back I finished overhauling a 
National NC-188.  Part of the job was restringing BOTH the main and 
bandspread tuning dials as somebody had used heavy waxed cord (like you lace 
cable with) for one dial cord and the other was a sewing thread 8^(

Anyway, due to tight quarters, this one turned into a real pain in the 
backside to restring properly.  I used every dental pic and seizer that I 
had, but finally got it.  I THOUGHT I was following the drawing in the 
manual exactly! Imagine my dismay when the main tuning worked properly, but 
turning the bandspread knob made that pointer travel in the wrong direction. 
YES, it travels correctly in relation to the bandspread capacitor, but the 
knob works backwards.  Examination showed that I went around the Knob shaft 
the wrong way (drawing wasn't all that clear).

HOWEVER, it's NOT going to be corrected anytime soon.  That was the last 
piece of 'real' dial cord that I had that was long enough and after the 
knots were tied they were glued to keep from pulling out, then clipped. 
Besides, this way it keeps me on my toes when tuning <grin>.

73 de Phil,  KO6BB
DX begins at the noise floor!

THE BEACONEER'S LAIR:  http://www.geocities.com/ko6bb/
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Merced, Central California,    37.3N  120.48W  CM97sh




> Matter of fact, everything was just the opposite
> of where it should be. 75 meters was way down on the left side of the 
> scale.
> Now, this was a head scratchier. Hmmmmm, did they make SX-71's with 
> reverse
> dials. Probably not, must be something else wrong. Well, you probably
> guessed it. Both the main tune and bandspread dial cords were strung the
> wrong way. YES, that's right, couldn't believe it. I removed all the dial
> cord and installed new cord, the right way, turned it on and alignment 
> took
> about 1 hour to complete.