[Hammarlund] HQ-129-X Question

[Glen Zook]

The manual on the HQ-129X states that the bandspread is to be set at 200 which, on the original receivers, was fully open.  Somewhere during production the bandspread dial was changed to have the logging scale 0 to 100 instead of 0 to 200.  The original HQ-129X bandspread dials had the 80, 40, 20, and 10 meter bands calibrated.  The very last versions had the 15 meter band added.

The actual quotation, from page 16 of the manual (I have an original) is:

"The front row of adjustments, shown on the chart (Fig. 8), control the H.F. Oscillator circuits and consequently the dial calibration.  To check these adjustments the band spread dial must be at 200, since that is the setting at which the main dial was calibrated."

On page 4 the band spread dial is described as:

"An exceptionally wide band spread of 310 degrees supplied by a special 9 section condenser, is provided on the 4 higher frequency ranges.  The band spread dial has 5 scales.  Four of these are directly calibrated for the 80, 40, 20, and 10 meter amateur bands.  The fifty scale is an arbitrary 0-200 division scale, provided for making up calibration charts for other bands, such as the short wave international broadcast bands.  It is also of use in logging stations."

My original manual has handwritten notes changing the 200 reading on the band spread to 100.

Glen, K9STH

Website:  http://k9sth.com


--- On Mon, 11/29/10, Roy Morgan <k1lky at earthlink.net> wrote:

> From: Roy Morgan <k1lky at earthlink.net>
> Subject: Re: [Hammarlund] HQ-129-X Question
> To: "hammarlund List" <hammarlund at mailman.qth.net>
> Date: Monday, November 29, 2010, 1:07 AM
> 
> On Nov 25, 2010, at 2:45 PM, Carl wrote:
> 
> > Thats a good possibility but it would also affect GC
> which is where  
> > its
> > aligned.
> >
> > The BS cap could be out of alignment, it has to be
> exactly centered.
> 
> Carl said "centered".  Not "fully open".  Do I
> remember that unlike  
> many bandspread arrangements, the HQ-129 is aligned with
> the  
> bandspread capacitor HALF MESHED when the main tuning dial
> (and  
> bandspread dial) is/are set to the appropriate set
> point?  If so,  
> maybe someone has changed the relationship between the
> bandspread dial  
> and the capacitor.
> 
> Many radios are set up so the bandspread dial is at its
> upper  
> frequency, the bandspread cap is at it's lowest capacity
> position, and  
> the logging dial is at 100, and the main dial is set at the
> upper end  
> of the section of the band to be spread.  Often this
> is at the upper  
> end of the ham band as it was at the time of
> design/manufacture.
> 
> Worth checking.. don't rely on my (possibly feeble) memory
> here.
> 
> Oddly, a TMC GPR-92 I have here uses frequencies above the
> ham band  
> edges, e.g. 4.1 mc for 80 meters.  Maybe they
> accounted for MARS use.
> 
> 
> Roy
> 
> 
> Roy Morgan
> k1lky at earthlink.net
> K1LKY Since 1958 - Keep 'em Glowing!
> 
> 
> 
> ______________________________________________________________
> Hammarlund mailing list
> Home: http://mailman.qth.net/mailman/listinfo/hammarlund
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Hammarlund at mailman.qth.net
> 
> List Administrator: Duane Fischer, W8DBF
> ** For Assistance: dfischer at usol.com ** 
> 
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>