I think John, that at this time of year, just past the northern Summer solstice, the far north is far from dark. North of Iceland it never gets dark at this time of year. Regards G0BZB

#Balloon #u4b

Oops, it just showed up. Just wondering if maybe it just didn’t complete data or something. Thanks Ted KG5TED

#u4b

If you can use a 5V or 5.5V supercap, MPJA.com has a few from 1 F to 4 F at reasonable prices. But be careful -- if you surf their site, you'll buy a whole lot more than you intended. At least that's

#u4b

Thank you Hans, Once I strip the spaces padded in the wspr database and convert the power it reads perfectly. Colin - K6JTH

#u4b

YAY! It's fixed!!! I have an update on my U4B. It is fixed and working again. I had two issues. The first to appear was that the micro usb port was flakey - pretty much from the start. I attempted to

#u4b #troubleshooting

John, Here is the link to the solar panels I used. But don’t think I’ll use them again, I only get around 6 hours a day transmitting out of them. https://www.amazon.com/gp/aw/d/B002MF2X9C?ref=ppx_pt2_

#u4b

What I recall from high school chemistry( so could be wrong!) hydrogen has one proton and electron but the electrons don’t weigh much, so about one gram per mole. But hydrogen gas is H2 so about 2 gra

#u4b

Hi Ted Just received your balloon here in Barbados...good stuff! (My antenna is a dipole at maybe 7 feet agl, running into a QDX.) 73 Roger 8P6RX --- *************************** Roger Hill ***********

#u4b

The Hindenberg did NOT have an exterior covering of thermite. That's a myth perpetuated by those wishing to decrease the danger of filling a dirigible or LTA airship with hydrogen. These same people w

#u4b

OK, all done, thanks Dave VE3KCL! Here's where I was hear using low power! FANTASTIC! Moving on to solar panels after they arrive, and then on to balloons and hydrogen! 73 Alan KC1QHV Oh, here's a vid

#u4b

My first attempt at a QFH was 1.9g without making any effort to be light. I made a few jigs to help get the shape correct but in the end the dipole worked better than my attempt. I was hoping the circ

#Balloon #antennas #u4b

Ted, Those PowerFilm panels work really good if you have the light ones (1.8gr). But, we have observed the voltage getting higher and higher each day until contact with our balloons was lost. On a cou

#u4b

Pat, Too funny ! I can’t wait to get back to FL and play with a U4B. I’ll be placing my order while on the road and hopefully it will be at my QTH in September. This seems like an electronic version t

#u4b

Thanks Dave. I've now got it sitting out on my desk and several sites have received my WSPR transmissions, so I'm in good shape. Now waiting for solar cells and deciding what kind of battery to use, t

#u4b

Thanks Hans, all good. No immediate need to fix anything as I am able to successfully use the proper WSPR power settings now. Maybe including a table with valid power levels in the documentation is su

#u4b

John KK4ITX Hans is very busy at the moment so his time is limited to upgrade the mapping solution, but it works well as it is . if you look here https://qrp-labs.com/track/495_U4B29.html and here htt

#u4b

Thanks Liam. We just crossed the posts there. Its a really simple little program when it is there in front of you. Not so easy when you are a programming clutz like me. I had originally compiled my ed

#u4b

Hello Liam Muhsin TA1MHS also reported the same thing. He later found that outdoors with a good 360° sky view Hardware test doss actually work. So it appears that it needs much higher satellite signal

#u4b

Hi all I have published firmware update 1_00_003 for the U4B http://qrp-labs.com/u4b The changes are: In the hardware test screen, now you can press Ctrl-R to view a scrolling screen of all the raw te

#u4b