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After I posted my replay, I read Jerry's recommendations.? I like the second receiver test for the BFO to verify that the Raduino RF section is working.? I will need to remember that for future

Hi Jerry, i am using the amateurradiokits.in enclosure, which comes with some extra items to wire up connections, one of which is a three pin connector for volume. What happened was that the red and

Gus, As a potential way of isolating the fault, you can unplug the Raduino from the main board and run the Raduino from a USB port on your computer, or other 5 volt supply.? That would let you know

Gus, This is not very clear to me: The volume control on the uBitx is wired up to an 8 pin connector, the power supply goes into a 3 pin connector.? Would be hard to swap them. Exactly what pin did

Tom, The Kang approach is in fig 2 of the W7ZOI article pointed to by post /g/BITX20/message/70861 That article mentions Roy Lewellen, W7EL, and his "Optimized Transceiver" in the Aug

Thank you, Mark. I do have the 4.7k ohm resistor installed and I will try to adjust the contrast as well. Perhaps that will fix the issue, save for my switch, which is not functioning and needs to be

I can imagine what that was like. I did not work in the space race, but, as a kid, a friends father worked for Autonetics and he would bring us to their employee open house events and we would get to

Hi Gus, Well, if you smelled something then likely something got a bit too hot! A couple notes: The black squares on the display is normal if you haven't adjusted the contrast for the diplay yet

Thanks much Mark.. -- John - N0CTL - Fulltime RV in a 40' motorhome

That is an interesting circuit. So it looks like the series resonate circuit is a low impedance at 40 meters passing the received RF to the receiver amplifiers. Then, when the transmitter is keyed up

i was excited to put together my Ubitx today after finally getting a roll of .5 mm solder yesterday. I’m not an expert by any means in electronics assembly - I’d say that my proficiency is

I really could use a good reference for a long lasting replacement relay for the uBitix transimit/receive relay, what say you ?

John, If you are looking at the 5" Nextion files under AJ6CU, then I was probably the last person to touch them. Unfortunately, I couldn't find any of the graphic files either when I made all my mods

As John, K0JD pointed out in post /g/BITX20/message/70894 the TenTec Argosy was using rectified RF to create the high DC voltage required for a PIN diode T/R switch.? As proposed in

Correction: Second paragraph here mentions it plus a couple other options with regard to TR switches: /g/BITX20/message/39746 Jerry, KE7ER

Tom, You need to poke around a bit further on qrpkits.com https://www.qrpkits.com/bitx20a.html Schematic is in that first assembly manual listed. Second paragraph here mentions it plus a couple other

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Same here Tom. I lived near Huntsville when I was first licensed, WN4CCA. I sent off for a NASA technical bulletin – “Telemetry”. Latest in high tech. Interviewed at IBM Huntsville, they showed

Eric, i have a couple of display protection boards left when you do your JackAl display de n2aie vince

I would appreciate assistance with the 40 please. After triple checking connections, I fired up. The display was blocks which adjusted with the pot on the Rad board. It was drawing 140ma on idle