I am researching a low-power-on-one-band symptom on my High Band QDX, Succinctly, the power out was measured into a dummy load via a WM-2 and the rig was powered with a 5AH SLA bucked down to 12.0 VDC. Results below:
??? 20m ~6.0W 0.70A
??? 17m? 5.0W 0.66A
??? 15m ~6.0W 0.74A
??? 12m ~4.3W 0.66A
??? 10m? 2.0W 0.59A
I then did an RF filter sweep of the rig using PuTTY and got the images attached below. Here are my questions:
(1) I checked and compressed and loosened the turns on L4 and L10 to little or no effect on the sweep of 11m or 10m.
(2) To me, 20m looks like crap yet the rig puts out a healthy >5W on that band.
(3) The rest of them looks sort of OK.
(4) The 11M/10M looks great and clearly (to me) does not look like the LPF is causing the low power condition.?? ?
(5) Sorry for the ignorant question, but what do the filter sweeps show to all the trained eyes out there?
I have consulted the LY2H and EX0AA comments on the one-band-low-power matter and am still sorting through the group's anecdotal comments and other resources. Like LY2H, who could live with 3 watts on 10 meters, I could as well -- just not the one watt that my rig outputs on a 10m antenna. Also, I mainly want to get "some steerage" on how to utilize the tools and techniques to solve the problem.
Thanks in advance,??
--
William, k6whp
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"Cheer up, things could get worse. So I cheered up and things got worse."
k6whp