[Hammarlund] SP-600 JX17 is playing very nicely.

[k6uuz@juno.com]

Hi Phil et al;

Most alignment procedures call for aligning the dial at about 1/4 the
dial at both ends. e.g. 600 kc and 1400 kc for the broadcast band. This
reduces the error in the middle by creating a small error at the ends.
The net result is less error anywhere on the dial. Good luck.

73,

Ed Richards K6UUZ 

On Mon, 16 Jun 2003 22:39:11 -0000 "Phil Atchley" <k06bb@elite.net>
writes:
> Hi, me again.
> Well, it looks like I 'might' have finally got all the bugs ironed 
> out of
> this JX17.  I've been listening to it extensively the last few days 
> (and
> making the air conditioner run overtime 8^) and no new bugs have 
> cropped up.
> 
> 
> The first few days after the overhaul the dial calibration shifted a 
> little.
> I've found that is normal and suspect that it is the DeOxit D5 
> "cooking out"
> of the tuning capacitor (grounding rubbing surfaces), tube sockets 
> etc.
> Anyway, Saturday evening I tweaked it back on frequency and it's 
> staying put
> now with no more sudden shifts due to flaky mica capacitors.  It'll 
> probably
> run for another 50 years <BIG GRIN>.  
> 
> One thing I've noticed is that it calibrated "dead on" at the low 
> and high
> end of the various bands and has a small "bulge" around the middle 
> of the
> tuning ranges.  Not a lot, just enough to notice it.  HOWEVER, it is 
> close
> enough that I have no intention of "knife edging" the tuning 
> capacitor
> plates.  
> 
> 73 de Phil, KO6BB
> 
> ****************************************************
> *  DXing WITH THE FOLLOWING EQUIPMENT.             *
> *  RECEIVERS:                                      *
> *    Hammarlund SP-600JX17 Surplus receiver with   *
> *               Hammarlund HC-10 Sideband adapter. *
> *    Yaesu VR-5000 Wideband, "DC to Daylight".     *
> *    Homebrew Longwave "Hybrid" CW receiver.       *
> *    Others that pass thru or are waiting repair.  *
> *  Homebrewed Ant/Rig switchbox with filters/Amp.  *
> *  ANTENNAS:                                       *
> *    Coil Loaded 18.5 Meter Long Sloper.           *
> *    Roof mounted Hustler 6BTV 6 band Vertical.    *
> *    Scantenna Scanner antenna at 7 Meters high.   *
> *  LOCATION: Merced, Central California.           *
> *  COORDINATES: 37.18N  120.29W  CM97sh.           *
> ****************************************************
> 
> 
> 
> avast! (VPS 6/13/2003): the message contains no virus
> _______________________________________________
> List Administrator: Duane Fischer W8DBF
> ** For Assistance: dfischer@usol.com **
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