I am trying to track down why my power output is low. I have a couple of hours into
this today... my vacation day (use it or lose it)
----Snip from the email that I sent to the
I got a note from Gary (support) and Don (w3fpr) with some ideas.
--I checked the low pass filters and the number of turns.
--I validated that T4 is oriented the right direction --No burnt relays
--8R/8T are ~8vdc (R-7.87/T-7.815)
--8R on transmit goes to 0.245vdc
--I clipped W1 to test for PA feedback (no change)
--I removed the bottom panels and cleaned up a couple of joints as a CYA
--Removed and rewound LP for 80m
--Checked & resolder the connections of toroids for 20/30, 15/17, & 40
--Repeaked (on receive) all of the band pass filters with a signal generator
--Repeaked (on transmit) all of the band pass filters
I made some progress: (Original Test... and after some rework)
--Freq-----1 Test----1 Msg----2 Test----2 Msg
Hi Cur 2.3w Hi Cur
Hi Cur 6.6w Hi Cur
Hi Cur 4.9w Hi Cur
Hi Cur 5.7w
As you can see I am now getting ~5w on all bands except for 80m. I suspect
that the toroid cleanup might have been part of the answer for 20/30 and tweaking
the band pass brought 10/12 into better alignment.
On the three bands that I get a high current message it appears at the
peak power out and does go away if the power is reduced. Any chance that I am only
seeing power out of Q7 or Q8 instead of both of them?