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Good deal! On an aside, I believe I read in a post a few weeks ago that all the Pi GPIO lines are used by the sBitx? I haven’t had time yet to study the schematic to fully understand the GPIO usage.

I am building a stockon add on for the sbitx. I will add a raspberry pico as the measuring device that you can plug into the usb port. - f [email protected]> wrote:

Another way NFETs can be destroyed is exceeding Vgs limits (voltage from gate to source). This could be due to a long source lead to ground, or a poor ground plane. This could be due to capacitance

I use one of these to hold the toroid https://www.jpmsupply.com/Soldering-Heat-Sink-Elenco-ST-23-p/92135.htm As long as you're careful they don't scratch the enamel.? They are nice and thin so you

Now to determine which of the six pins is #1. Schematic uses different numbering sequence than the data sheet for the relay. K3, KC1,KB1 and KA1 all show the numbering on the Schematic that the

Currently it's $30 for just two of the winders, or $40 for the kit with two winders plus the toroids and a tuna can to hold it all. At current pricing from kitsandparts, the toroids would cost $11.40

For many, the hard part isn't winding the toroid, it's keeping track of the counts. I rarely get phone calls, but when I do, it's while I'm winding a toroid. I just keep my camera handy and when I

Dan, A little off topic, but If you might have an idea on how to do that, private message me. I looked at the amplifier that you mentioned in your post. I looks a lot like the Palomar TX-100 (uses

I could be proven wrong, but I doubt a zener is needed on the uBitx. The uBitx has a forward transformer at the output which develops 24 volts (roughly) across the push-pull FET's regardless of how it

For the $30 you also get a selection of 50 toroids, so not a bad price. In a pinch, could probably use a pair of springy forceps in a vice on small toroids, Or cut something vaguely like what he has

LOL :-D Last night I was messing around and had the 40m dipole connected to another rig and had the sBitx unterminated. I bumped the CW key and put out 10 watts momentarily and nearly screamed. I

As an experimenters/makers playground, the lack of self protecting circuitry became apparent. I’d mess around with multiple antenna systems and tuner/switches/cables/CMC balun/etc. ?and 1 out on 10

Raj, And this seems to be the PDF file http://www.qrpme.com/docs/Toroid%20Tool.pdf Thomas -- *Support@HFSignals*

Raj, I think it's this link, http://www.qrpme.com/?p=product&id=PT2

Dennis, a link please.

I have discovered a great set of tools to make this process quick and easy! Go to the QPRME website and click on Toroid EZ Tools in the sidebar.? Then read the documentation provided in the link.

Hi Ulf, I haven't tested the QR code backup yet..I should probably do that. I'll try it and get back to you. 73, Tim A. King Jr. Amateur Radio Station AG4RZ

This is correct and simple! Thanks Evan. Raj

No no, partly yes. The amp side is correct but on uBitx side connect one end of coil to ground and other end to TX (12V on TX).. simplest. I usually dont recommend connecting to PTT line as any mishap

with calculator https://www.monolithicpower.com/en/mp2331h.html