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Bench is shut down for the night. I planned on re-running the tests tomorrow. Jim

I'll let someone else do those. I only operate CW myself and don't even have a microphone made up for any of my uBITX rigs.

Twenty looks terrible. You may have to increase the attenuation a bit and crank down the bandwidth to 10khz or 30khz to show up the crud hiding in the grass. Can you do a second pass on twenty? Keep

Nice job. It looks like all the bands except 20m are pretty good. I assume this was straight cw. I don't see any spurs. It would be interesting to see the same sweeps with an audio tone feeding the

Yes it has an external 50 ohm RF sampler with a variable attenuator. I'm measuring the harmonics relative to the RF carrier, not output power here. Checking spectral purity.

Hi, Can it do better than 1MHz RBW? Do you have an external attenuator on it?? The display only shows 20dB which at 0dBm would be 0.1W input I think. Power measurement would be better done on 'scope,

Jim, Very nice! I have been using mine extensively on a project that involves crystal lattice filters. It is invaluable in both characterizing the crystals for inclusion and for evaluating the final

Thank you to Tom and to all who make this Ubitx journey for us the most satisfying way to participate in Ham Radio 73 Laurence Oberman KB1HKO <jgaffke@...> wrote:

You need to thank Tom for assembling those schematics: ? ??/g/BITX20/message/65671 Tom describes the Minima as the first uBitx, but it was different enough?that I'd just call it

My wife was very nice to me and bought me a brand new Siglent SSA 3021X spectrum analyzer for my upcoming 77th birthday. I have 1 Version 5 uBITX and another on the way.? The one I have I built up on

look at; http://ultimax-antennas.com/store/p2/ULTIMAX_DXTREME__.html

Jerry, Good page to find ubitx schematics. I am sure there will be those who apriciate you effort. ?As I had stated earlier, this topic was not for my benefit, rather the new to ubitx journey.?

Ted nice message - I don't even what to think what I paid for my first PC, and 8 bit Kaypro with not much RAM at all? I somehow am an EE too, I need to function as one for just a few more years.??

Pat, I have heard that end-fed antennas are becoming popular with RVers. Palomar is just one company selling them: https://palomar-engineers.com/antenna-products/End-Fed-Antennas-c25706168 Their site

The QRPlabs 10W PA kit is not a bolt-on solution for the uBitx. I don't think anybody has posted how to use this with a uBitx. But doing so would be considerably easier than addressing all the issues

Hi Ben, ? ?Thank you for the file upload!? I played a bit with the drill files to see if OSHPark can use the files.? The good news is that their tool list editing tips show us how to combine the

Hi Paul, ?Check our the link Jack sent me. ?The resistors are really Raduino mods. ?The Bitx 40 should be wired up and tested prior to trying to make these mods and system code changes. ?My Bitx

You can spend a week looking at thousands of posts debating how to get the uBitx PA to behave. And wind up being more confused than when you started. Most of the trouble in getting RF power out is due

A big thanks to Bob Gass, N4FV, who has very patiently answer my innumerable stupid questions via emails! The Raduino and the frequency display are assembled with the standoffs. The eight pin cable is

Hi Evan, ?I have seen questions similar to yours and others which can take a little work to find the answer. To hopefully help, I created a page on the wiki for this group with links to the various