开云体育

Farhan No progress today. I guess I will wait for the upgrade kit. I have built and fixed several Ubitx rigs but this issue has me stumped. Anyway once it get it going again I will enjoy this one as

Steve, You might want to telnet to port 7000 of the rpi while sbitx is running. This an easter egg yet, I am not sure if I should produce a telnet remote or a web/http based remote facility. It only

To track down the hum and spurs, I had a trick. I use a spectrum analyzer with its input connected to the DC power line through a 0.1uf capacitor. The important thing is that the RF cable between the

Scott, I think you're probably good to go at this point. Extra bypass filtering on the output never hurts. In the olden days of HAM radio, 60/50Hz hum was the big problem with power HV power supplies.

David, I did a bit of experimental work on this. The toroids need more than 15 turns or so for the self-shielding to work well. At fewer turns, the shielding though better than that of a conventional

Mark, Shipping is included in the price

If that RV had a solar panel on top, that could also be the source of the noise. Solar charge controllers are kinda like a variable switching power supply. Mine? causes interference all the way to 60

Thanks Steve!

Farhan; You have created an amazing radio. I love that the radio has the ability to recompile it's own software. I love that the code is open-source, so that changes can easily be made to add

Hi Jerry, Ok, I see.? That makes sense.? It looks like there is very little real energy in the above 200kHz range (if any).? The only other thing I have tried was a cap on the output.? The larger

Scott, The reduction in capacitance was because you really only need to filter out the 350kHz signal. Did you try a filter on the output side of the buck converter? Are you seeing any harmonics in HF

please remember that there are ham bands at 136khz, 472-479 khz, and commercial marine cw at 420khz and 500khz. a switcher drifting its spurs around might well make the radio unusable down there. the

Mark, How much was shipping on that kit?

David: I've never run into such a person, but clearly he does not want to learn CW, so he's never going to use ALP as a learning tool. He's using it as a crutch, and that's not the position I'm taking

Hi Jerry, Right.? The choke is in series with the converter module input.? The cap is after the choke connected input to ground of the converter.? I made the swap to 10uF but I don't see a

Jack, still love all your work you and Al have done to further the hobby. I guess im just very opinionated on some topics.Sorry. anyway will be looking for your stuff to come out at 4sqrp. 73 David

last point of my opinion, and i apologize if i come across as a hater,but im not. Friend of mine is a no code ham. he learned the basics of the code and uses a decoder to decode the cw. he sends about

The 4SQRP people have the Beta boards from China and are starting to test them. I don't have a firm date, but it looks like late Sept, early Oct to me, but that's just a guess. Jack, W8TEE

David: I think you read what I was saying incorrectly. I said a practice session is done with the eyes closed. If the student is doing that, they're not using the decoder. However, if they "get lost",