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Upon completing the QCX Mini, I set the reference frequency to 25MHz (TCXO); then tried adjusting the bandpass filter. Adjusting C1 changes the audio output amplitude, and a maximum can be reached

Good news, thanks for sharing! Can you describe the differences between the two versions of T1? Thanks! --Al WD4AH

Hi All Have a look at this. https://en.m.wikipedia.org/wiki/Loon_LLC I was able to track these using one of the plane tracker apps on my ipad. This stuff has been going on for years WRT to adjusting

Hi Changed and rewound T1 on my QDX2 (Ver4) Hi band 10m and 11m are perfect now to dummy load 2.8W It was T1 ! Thanks again Hans 73 muhsin TA1MHS

Hi Stu You can buy an TinySA (plus? attenuators, I'm using 20dB + 30dB 20Watt) to check levels and harmonics It was very useful for me. 73 muhsin TA1MHS note: 5 watts is 37dBm, if you use two

And/or download its "weather data ? Bouncing greetings back to the originator might not be approved, of course... Michael 2E0IHW

Interesting idea. I do not have anyone in range but I've read articles on microwave two way QSOs using scatter from the tops of thunderstorm clouds. In the past I've used scatter from aircraft flying

You just need to rewind all the toroids, remove C5, and replace C25, 26, 27, 28 and 30. The instructions only go up to 17 meters, so you need to wind them using the 17 meter instructions with 2 turns

Many I worked with a guy who had lived in Novosibirsk and worked on missiles nearby. When the iron curtain came down he didn't believe it would last and so packed a few clothes in a bag and made his

This is what I’m looking for! ?I have a spare 40m QCX, and would like to change it to 15m. ?Is is simple as changing the windings on the toroids, or something more involved? ?I was planning on

The band filter for RX is switched by IC3. The LPF (RX and TX) is controlled directly by the IC-8 microprocessor and a few MOSFets. Hint 12V is really 12V, use a meter to verify that, or risk another

Check your computer clock, it MUST be accurate to within a couple of seconds. The filter switching is tested when you do the filter sweeps. The 20m filter does not look good but it works and is known

The Times commented on it this morning. Unlike LEOs the balloon can loiter for long periods of time. If you read (for example Jacobson’s book Area 51) about the development of the stealth and spy

K It would be easy to change height by putting more gas in the envelope to go up, and of course releasing it to go down. However in a sophisticated ballon with a relatively heavy payload and solar

The USA has spy satellites spinning round the world gathering intelligence and are worried about a balloon , unbelievable.

Ron, If I was only closer, I would us an AM modulation on my 100W laser and see if I could bounce that off of the ballon. :)

Missed opportunity? I wonder if from the ground, last heard it was at about 60K feet, if the payload has as much reflective surface as the first communications satellite, Echo 1. Its too far from me,

read the comments in this thread. many postings have indicated units that have been found to have NO RFI problems ... the ones I recently posted are perfectly clean in my experience. w2jc

I bet it has a self destruction device....