[Hammarlund] HQ-100C Alignment

[Singley, Rodger]

Bill,

Tune your TS-440S to 12.455 and set the HQ-110 dial to 12 Mhz.  Set the bandspread to the set point (make sure the bandspread capacitor is at its unmeshed position).  Now adjust the oscillator coil so that you hear the oscillator signal with the TS-440S.  Set your signal generator to 12 megahertz (you may have to rock the generator dial a few Khz. either way if the calibration is a bit off) and peak the antenna and mixer coils.  

Reset your HQ-110 dial to 28 Mhz. and tune your TS-440S to 28.455 and adjust the oscillator trimmer cap so that the signal is heard in the TS-440S.  Set your signal generator to 28 megahertz and peak the mixer coil trimmer cap.

At this point, I still think it is just way out of alignment instead of having an actual component failure.  Alignment using these steps will avoid accidentally aligning on an image or spurious frequency.  I repaired a friend's SX-24 last year and it performed similarly due to alignment being way off on the highest range.

Let me know how this procedure turns out.

73, Rodger WQ9E


-----Original Message-----
From: Bill Stewart [mailto:cwopr at embarqmail.com]
Sent: Tue 10/20/2009 11:29 AM
To: Singley, Rodger
Cc: hammarlund at mailman.qth.net
Subject: Re: [Hammarlund] HQ-100C Alignment
 
Good Morning HQ-100C advisers,
Here's what I've done this morning. I ran a wire from the HQ-100 over to a TS-440S (test rcvr). I started on the BC band (.54-1.6). Put the sig. gen. on 1kc, tuned the HQ-100 to the sig. gen. and listened on the TS-440S...and got a sig. at 1.455kc...did the same on 1.6-4 band...gen. at 3kc, HQ-100 tuned to that sig, and heard a sig at 3.455kc on the TS-440S. Also same type results on the 4-10 band. Dial readings were pretty close to actual freq. Now, on the screwed up band (10-30), I put the sig. gen. on 15mc, and found that sig. on the HQ-100 at around 13.4mc dial. I found a signal on the TS-440S at 15.455mc. These tests seem to indicate the IF is tuned to the upper side of the received sig. I found some weak 'images' (?) of the sig. gen. sig.(15mc) up around 26 and 27mc (dial), on the HQ-100. 

On the HQ-100, the dial calib. is about 1.6mc below the acutal signal freq. Could there be a component failure or change in the tuned circuits for the 10-30mc band? That's where I am at this point. 

Many thanks for your suggestions.
73, Bill K4JYS