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Need HQ-129-X Bandswitch help - Hammarlund
I've spent quite a bit of time trying to get the 5.7 - 10 MHz band to
come back to life on my Hammarlund HQ-129-X. I've got the user manual which includes a schematic. When I got the receiver several months ago I needed to "wiggle" the bandswitch knob to get this band to work. The band then worked fine, especially my frequency of interest around 7.040 for cw. All the other bands worked without any "wiggling" of the bandswitch knob. Now after not being used for about 60 days no amount of "wiggling" will get the 5.7 - 10 MHz band to come alive. It is as if the antenna is disconnected. All the other bands work fine. I've been taking a close look at S2 which is connected to the bandswitch knob. S2 actually has six rotary switches, each with front and rear contacts. I thought some spraying with contact cleaner, or light swabbing with contact cleaner with q-tips would bring the band back. I have had no success. All the other bands still work fine, but not the 5.7 - 10 MHz band which is the one I want to use. Any thoughts on what steps I could take next. Thanks, Bill Bird Chesterfield, MO www.billbird.com kg0yj at arrl dot net |
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