Finally got around to working on the ubitx again.
I traced the logic for each of the three lines (TXA,TXB, and TXC) to ensure the logic was operating as it should. They were. I then traced through each of the relays and filters to see if and where the signal might be getting attenuated. KT1 looked somewhat strange on the scope when going into transmit - the signal started out strong but soon went very low. Hmmm.
I then went and re-heated the pins of each of the three relays (KT1, 2, and3). I also re-heated some of the leads on some of the components in the 4 filters that looked dull to me. I then went back and had another look at the bias to the 510's. Both were set to 100ma each. Here are the results:
Band ?? Current ?? Wattage
80 ? ? ? ?? 1.84A ? ?? 9W
60 ? ? ? ?? 1.46A ? ?? 6W
40 ? ? ? ?? 1.26A ? ?? 7.8W
30 ? ? ? ?? 1.26A ? ?? 4.2W
20 ? ? ? ?? 1.61A ? ?? 5.5W
17 ? ? ? ?? 1.25A ? ?? 3W
15 ? ? ? ?? 1.07A ? ?? 2W
12 ? ? ? ?? 1.3A ? ? ?? 2W
10 ? ? ? ?? 1.0A ? ? ?? 1.5W
Judging by others results, it doesn't look like I can get much more out of the rig as it stands without replacing finals, etc.
It looks like my rig is now "normal" for the ubitx.
That seem like a fair conclusion?
Thanks to all for the help, now to start playing with larger displays, new finals, new software, etc. It never ends!
73, Mike W1USN
