[Hammarlund] HQ-129-X Question

[Glen Zook]

Use a counter and make sure that the oscillator is above the indicated frequency on the 4, not 2, lower bands.  Especially on the 3.2 MHz to 5.7 MHz and on the 5.7 MHz to 10.0 MHz bands it is VERY easy to get the oscillator on the wrong side.  Within the last couple of months I had an HQ-129X in for service that had exactly the same problem.  Not only was the bandspread off calibration the tracking between the end points was not that good.  It turned out that the receiver had previously been aligned with the injection frequency on the low side for the middle 2 bands.

Glen, K9STH

Website:  http://k9sth.com


--- On Sun, 11/28/10, Richard Knoppow <1oldlens1 at ix.netcom.com> wrote:

Yes. This is true for the 129X also. We have discussed this in the past. The '129X manual may not mention this fact, but it IS a fact.

BELOW signal frequency on the two highest bands.