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Hi James Jones In my neighbourhood the bulk of the commercial air traffic is below 40000' but on occasion, some do fly higher . See the attachment. Most picoballoons with recent 32" spherical balloons

...do you intend to let it hover over Alaska? Make sure you paint some nonsense meaning, far eastern looking characters on it: they will go nuts trying to decipher the message ;-)

I have noticed this problem also. I replaced the DC plug on my power supply with another I had in my junk box and it fits much better. I have noticed this in the past - many DC plugs (probably of

Thanks Evan, Yip they are available at RS Components and not to expensive.? What do you think - should I give them a try and see if they can do the job. 73 Timo

Please help me understand how these ballons are being operated considering all the recent debacle with the “spy” ballons. At 25,000, that certainly is a concern for air traffic. I have always

Perchance a passing F-35 took a pot-shot ??? Michael 2E0IHW

Thanks, Hans and Dave! Looks like my balloon (N5RWK-Stat) has gone dark since yesterday evening.? It made it all the way from Texas to Nova Scotia in one day, so I consider it to be a moderate

Timo, At first glance, it looks like the?IPU60R3K4CE should work.? It has a higher voltage and current capability.? Q3 is not used to amplify RF, only to switch the bias current for the PTT diodes.

Bad cable? Bad solder joints? Try a different port on your computer? Wiggle the wires when it's up? 73, Willie N1JBJ

QDX build (10-20m), powers up, able to load FW 1.09. I'm constantly having problems maintaining the com port, just going up (COM6 when it appears) and down.? Am able to PuTTY in but can't maintain

Hi All Bit of a problem on the 50W QRP Amp.? Q3 -?FQPF2N60C seem to be not available anymore.? Digi-key seem to be the last that has stock (360 in stock) and specifies that when it runs out that is

Well there's your issue, calibration is way out. Have you correctly verified both your TX frequency is real, and that you have no apparent drift ? What methods did you use to do this ? Or are you just

Hi Hans.? Is this (problem reading band selection jumper in some cases) relevant to the high band units you found with low power output on 10m?? It is not clear from the description if the issue you

Rob, I mentioned KK6PR, I guess his is one of the super RX stations that monitor ALL WSPR signals simultaneously and continually. (and nowadays some FST4W) Such stations often have super RX

Well, crud! I was going by the information on page 6, where it says "...the supplied USB connector can be installed with its socket facing out from the BOTTOM side of the PCB, or from the right side."

Not to butt in, but mine came from Amazon: https://www.amazon.com/gp/product/B01LWI20M0/ref=ppx_yo_dt_b_search_asin_image?ie=UTF8&psc=1 -- Cheers, Chuck

Don, I have been looking for wire wrap wire. Who still sells it? -- Colin - K6JTH http://tangokeys.com

On my QDX with zero RF after initial build, I found C2 had been knocked off.? The RF output goes thru C2 to the BNC center pin.

My experience is with different stations I have experimented with over a fairly long period of time. Specifically, these callsigns (at different times): KB8RCO??????? Personal Call: on the air

Microwave substrates are available with 8- or 10-mil dielectric thickness with 1/2- and maybe 1/4-oz copper, but it will cost you.? However with small patterns a single 12 x 18 or 9 x 12 sheet will