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Mike, I spent all afternoon with my spectrum analyzer, a two-tone generator, and my ubitx and came up with 10watts on 80m at 1.4amp total current draw being the cleanest signal I could get. I didn't

" 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." I think there

Very cool, good job! If it was a bad solder joint in one of the lowpass filters, then only one of the 4 bands would have failed to pass a signal.? So that probably was not the problem. If all relays

The attached jpeg shows the results of testing (CW transmission) with the out of the box RV1 setting and with RV1 set for maximum output. Looks like the results are similar to what has been reported.

Still not totally satisfied (are we ever?), but I did do most of the coding with the idea that others could easily adopt it. It is all addition to the v1.27.7 BitX40 sketch by Allard Munter, PE1NWL,

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

Here's Don Cantrell's description of Shuttle Tuning, using the tuning pot on the

Ashhar, I had 60db of external padding between the transmitter and the SA plus 30db padding in the SA itself. That should have been about 10 microwatts (10watt/1,000,000) of actual power feeding

Mike Because uBITX Encoder is very sensitive, I used the threshold method. It is not the same as the original firmware, although it gives a difference in the value when it is rotated slowly and when

Dex ZL2DEX I think the post was about a recent software upgrade, whether the new code retained the dynamic tuning feature or if it had regressed to fixed-rate tuning. Do you have a software example

I've mentioned this before: "shuttle tuning". There's a sketch way back in the dim dark past that dynamically changed the step size according to how fast the encoder was being spun. 1Hz/step slow to

Mike If an environment where have to continue using IF Shift, I think it would be nice to adjust the BFO as you said. Because IF-Shift is shift the BFO. And I used Audio Spectrum for the first time

Dennis Thanks for your feed back. I just released uBITX Firmware CEC Version 1.061, It also includes uBITX Manager 1.01. Starting with uBITX Manager 1.0, there is an option for setting IF Shift. If

You may just need to adjust the BFO. Out of the box mine was way off. Made everything sound tinny. If you use a program like spectrogram you can look at the audio output and see that it's shifted to

Henning, I re-spaced the turns and reran the spectrum analyzer for both two-tone and single tone. No discernible difference from before. So you are correct. I still plan on building a similar mixer

Philip Thank you for important feed back when WSPR Menu, Fixed a bug where the LPF does not change with the WSPR band. (Changed version to 1.061) If you have spare time, please test WSPR

i hope you guys are using sufficient attenuation ahead of the spectrum analyzer. typically, if you change the attenuation, the harmonica and the fundamental should fall exactly the same dbs. - f

Junior, When doing a two-tone and single tone test I do not see these harmonics. Carrier suppression is not what I would like but no harmonics. tim ab0wr Júnior PY2ADA via Groups.Io

I have decided to go in a different direction and use another type case to build my uBitx radio. So I would like to sell a case along with an 8 ohm speaker and also a roll of Copper Foil.? The case

Thanks Mike.? Usually when I order something online (and I do that a LOT!), I get a notice from the vendor that they have my order and, sometimes, give me an estimated date for shipment. Just