Just to see whether it puts out the correct amount of power why not just keying down CW?
Il 14/set/2018 20:11, "Sean W7SKD" <
sean.jrdalys@...> ha scritto:
Ok, I think I have this solved.
Really short version:
It appears that my major problem was the laptop that I was using for FT-8.? The laptop that I have been using is not putting out consistent volume/drive on wsjt-x with ft8 (even with a different sound card).? A different computer was tried and everything now works fine.
Longer version:
Ok, I'm a bit at a loss for 'why' this has happened, but here's what happened.? I spent a LOT of time tracing the transmit signal, going back through the mixer stages and into the mic amp (q6).? What I started to notice was that everything looked just great at DC levels, but when under drive ('tune' signal from wsjt-x), the signal levels and frequencies didnt seem to make sense.? I connected a commercial hf transceiver up to the same PC (which I hadnt done, as I didnt have access to one) and discovered that it was doing the SAME thing - effectively no output.? ?I tried a different sound card (usb connected) with the same problem.? When I switched to a different PC with the commercial transceiver, TWO things were discovered:? 1) suddenly I had signal coming out and 2) the transceiver was warning me of high swr.
so...high swr.? It appears that my tuner was set up incorrectly (mfj-971 - has 2 internal jumpers that have to be set for qrp operation, and the swr movement was incorrectly set), and I was likely running high swr for quite a long time with my ubitx and not realizing it.?
Once I got the tuner situation dealt with, the commercial rig works great with the NEW laptop, and still does not work well with the old laptop.? The ubitx ALSO works well with the NEW laptop now.? Whats really odd is that the OLD pc's soundcard still works fine with earbuds, just not driving either radio.
so...what I'm left with appears to be an odd pc situation (inability to drive the radio, but no other noted malfunction), but functioning radio gear.? If anyone has ideas on that, I'm open to them, but I'm not going to expend much effort in that area.
THANK YOU to those who posted and emailed me things to check.? I got into radio in order to learn more about electronics, and that is absolutely happening
73
Sean
