[Hallicrafters] A 'possible' SX-101 spur problem?

Edward B Richards zuu6k at juno.com
Wed Nov 17 17:23:35 EST 2004


Hi Phil;

I don't have the answer but I hear them too, here in Simi Valley, on my
HQ-100A. I thought they were images but I haven't checked 910 kc above
the frequency. will do so. Thanks.


On Wed, 17 Nov 2004 20:16:22 -0000 "Philip Atchley"
<beaconeer at mercednet.com> writes:
> Hi Y'all,
> 
> I have basically finished the work on my friends SX-101A receiver 
> and he's 
> due to pick it up tomorrow.  Yesterday I aligned and calibrated it. 
> It was 
> off some, but not "terrible".
> 
> Yesterday evening I listened to some hams on 40M for awhile, then 
> tried out 
> the 20 Meter band, though I fully expected the band to be "closed".  
> On 20 
> Meters I was hearing a number of international broadcasters 
> (frequencies 
> unknown) that I KNOW shouldn't be there. As the 20 Meter band was 
> basically 
> "closed" these broadcasters HAD to have been on a lower band, like 
> 25M 
> (11.5-12MC) or 31M (9.5-10MC).  So, I thought that perhaps I had 
> "mis-aligned" the 20 Meter band (it was the one furthest off).  So, 
> this 
> morning I rechecked the alignment and it is GOOD, RF stages peaked 
> properly 
> etc and I'm hearing quite a lot of 20 Meter ham activity "on 
> frequency".
> 
> This one has me really puzzled as a calculation of the "Image 
> frequencies 
> (+/- 3.3MC) for this receiver doesn't add up to ANY International 
> BCB being 
> heard on 20M.
> 
> Thoughts, ideas?
> 
> 73 de Phil,  KO6BB
> http://users.mercednet.com/beaconeer/
> Merced, Central California, 37.3N  120.48W  CM97sh
> 
> ***************************************************
> * RECEIVERS:                                      *
> *  #1. Homebrewed "Mitch Lee" Design              *
> *  #2. Hallicrafters SX-71 (1955)& VLF Converter  *
> * ANTENNAS:                                       *
> *  #1. 20 Meter long "loaded" Sloper oriented E/W *
> *  #2. Half Sized G5RV Inverted Vee oriented N/S  *
> *  #3. Roof mounted Hustler 6BTV 6 band Vertical  *
> *  #4. 15 Meter-band Inverted Vee oriented NE/SW  *
> *                                                 *
> * Number of different NDB's heard: 974            *
> ***************************************************
> 
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