[Hallicrafters] SX-71 Restoration update

[Philip Atchley]

Hi,

I did one of these a few years back.  I too had a problem with the Xtal 
filter (and have had on other sets too).  In my case the answer was 
CAREFULLY dis-assembling the Xtal and cleaning the element and contacts etc. 
with a solvent (I used gasoline followed by alcohol).  It was oily inside, 
probably residue from wax OR contact cleaner etc. getting inside.

The sealed metal cans that some radios (like the R-390 and SP-600) use don't 
seem to have this problem, but the ones with a plastic housing "sandwiching" 
the Xtal do.

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

THE BEACONEER'S LAIR:  http://www.geocities.com/ko6bb/
MY RADIO-LOGS:   http://www.geocities.com/ko6bb/Logs/
QSL GALLERY:       http://photobucket.com/albums/y123/KO6BB/
Merced, Central California,    37.3N  120.48W  CM97sh


----- Original Message ----- 
From: "Larry Kirkland" <lkirkland at sc.rr.com>



>I just finished (?) an SX-71 here, also.  The dial cord was correct on it, 
>but I need to do some more work with the 455 Kc alignment.  The crystal 
>filter is not acting as it should.  I suspect the crystal has shifted 
>frequency somewhat and the target freq is not 455 any more.