[Hammarlund] HQ-129X, tuning LSB

[larry roohr]

John,

I just finished tuning mine up last night, seems a sweet receiver so far.

But, what I found in mine is that the xtal filter is centered at 458KHZ, 
so tuning the IF to 455 per directions would not have been optimal. I'd 
suggest finding the xtal center freq and tuning the IF for that to get 
the most out of these beasts.

The 129x seemed to beat my NC-183 in pulling AM'ers out of the qrm last 
night (just a quick test), and possibly better than my HQ-160 with the 
Q-multiplier in use. I think I like it!

Larry


John M. Trindle wrote:

>I finally have my 129X up and running, after killing it last year while
>trying to address AC voltage on the case (still a problem, and I belive
>folks told me it was probably bad capacitors in the power supply section).
>It works great, and I've been enjoying pulling in SW, CW, AM and even ham
>(Upper Side Band) traffic in the 20 meter band.
>
>However, I'm having a devil of a time tuning in ham traffic in the 75
>meter band.  I have good strong signals, but I can't get them clarified
>with the BFO.  It always sounds as if I'm on the wrong sideband.
>
>Any tips for tuning?  Am I out of alignment, and just unable to tune on
>the proper side of the signal?  Every so often, I *do* get oopyable
>voice... but no heterodyne so I'm pretty sure it's not AM.  I don't know
>if this is one of those "Single Wide Band" or DSB guys though.
>
>Thanks for any tips.
>
>(oh, and the problem which "killed" it turned out to be a wire in the
>tuning section shorting to ground, which disabled most of the main tuning
>capacitor)
>
>  
>