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Allison, Thanks for your comments on small transmitting loops.? Seems to require a lot of work to get one working well. They are quiet on receive for sure but lots of Monkey Business to change

Correction, 10x does not work, 1x does. 10x would read double if that 9meg resistor inside the probe was more like 4meg. And that could easily be measured with an ohmmeter from probe tip to bnc center

Very weird, your math looks right to me. Could be a bad scope probe, have you tried more than one probe? Could be a bunch of bad scope probes. You have 4 measurements saying around 5 Watts and one

Sounds like a good setup. I’ll be doing something similar.

Yup, I have no idea why they come mounted sticking out the side. If you wish, once flipped you can keep that LM7805 cool by soldering the tab to the Raduino ground plane, though somebody once pointed

I cant see any attachment. Just google and you will see what they look like. Check your polarity of connection.

Thanks to?Ufi Auttorri for creating this guide. It was certainly a lot of work to do this.

I solved my stability problem for the Hendricks Bitx20A ?kit by applying the?Martiens mod. ? ? Now I need to resolve a low power output problem. ? I had been just calculating the power output

I am (unfortunately) counting in from the right, so my pin numbering? is reversed from that shown at? ?http://www.hfsignals.com/index.php/ubitx-wire-up/

Yup, this one has been hard to follow. Let's keep this thread going, seems a fine title for it. Doing a search for "Rogier", I find these: /g/BITX20/message/47715

I've been working FT8 for a few days on my shiny new uBITX tied to a homebrew G5RV set up as an inverted v.? Just finished a 20m QSO with Tasmania.... thats over 9000 miles on just less than 9w!

Thank you for your reply.. So the one that I bought is the electret condenser mic.? When I didn't connect the mic to the circuit the voltage from 4.7KOhm resistor is about 9.5-10Volt. But when I

I replaced both BS170’s and solved the bias current problem. ??I re-soldered both T1 & T2. ??That may have been a contributor. ?I ended up using a 470 ohm resistor across their drains instead

I had the wrong link for the FTDI cable.? It should be https://www.ebay.com/itm/201486735007? Also worth noting, you could probably save on shipping to order your parts from less suppliers than I

I guess this is a wishing well because I just hit 1,128.9mi/w with a QSO from Brazil. Just in case this thing works....oh mighty list I still haven't won the lottery. ? -- www.bitxmap.com (

Well took it out of the box and wired up the connectors and all and having on the bench spread out. haven't measured power in any exacting way for at 11V I see 6W at 7mhz.? Receives well. I then

Rogier has a few threads open on his problems.? Casually, hard to keep up with where he is at the moment. He has shared more information than is contained in this thread. I usually _try_ to look a

I have often thought of using the IRF's in common gate mode to avoid gate capacitance issues. Never came across such a design, gain would be slightly low but should have better stability and better

The AGC and Pop Fix boards have both been redone and are already at the board house. Copies of the new ones are in the "Files" section.....as before.? Some of the changes were very slight but it will

While a soldering iron and a screw driver is all you need to setup the ubitx, i would encourage everyone to experiment with testing and measuring. A resistive swr bridge is just three resistors and a