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Aaron - why not build the Pi & the uBit into a single unit, something like the sBit? Gerry Sherman Sent by the Thunderbird

The joys of mass production and finding little bitty problems. We have the same thing in drug product production and vaccine production of course.... only when you make a lot of some thing do you

Ok fellow BITX'ers. I have tried to make a larger case for my uBITX so that I can use a 3.5 inch Nextion along with other add-ons. Since I have destroyed several steel cases in attempting to make a

Bob, Thats the LM380 having some kind of oscillations. I will have a fix for the quickly. The sound goes away if you turn the wifi off. Right click on the wifi icon and select Wifi off. - f

The spec sheet is on https://www.hfsignals.com/index.php/sbitx/ You could transmit on 630 khz. I am not sure if the PA transformer inductance will be enough that low. The exciter will work right down

The pots to set the IRF510 bias on the uBitx and Bitx40 were backwards from what most people would expect. My best guess is that the sBitx follows this unfortunate tradition since pin 3 of RV1 and RV3

Thanks much. Planning on reworking a digital mode interface to use with it. -- Tom Sevart N2UHC St. Paul, KS

https://www.hfsignals.com/wp-content/uploads/2019/12/ubitxv6.pdf Looks like ring is PTT, tip is microphone audio.

Very nice schematic, easy to read! Thanks Charu. * Your Logic input Vi pin 6 / U4 FST3157 is DC isolated from CLK2 and is DC biased by RV1. I would have a direct Vi input from U3 SI5351 with 3.3V

I can't remember, and I can't seem to find it anywhere, but with the uBitX v.6 microphone plug, is it tip audio/ring PTT, or tip PTT/ring audio? -- Tom Sevart N2UHC St. Paul, KS

You can disable wifi completely by doing it in the /boot/config.tx file. just edit and add "dtoverlay=pi3-disable-wifi" to the end and reboot. You can do the command ifconfig before and after to see

If this is caused by an audio device receiving from the wifi, is there a way to turn off the wifi to stop this? I tried to turn off the wifi in the menu that has our router listed but it doesn’t

Don't see any reason it would not receive ok down there. though you may need to hack the RPi software some. The stock sBitx is not appropriate for transmitting on 630 meters. There is no transmit low

Still waiting for my shipping notification. I've got one coming without the display and Pi. wrote:

I use an emtech zm-2 tuner and also a ldg z100 tuner. both seem to work 100%. Im an odd ball,. I like just a little bit of swr on my antennas. 1:5 seems to get out better where i live.I also use rg6u

Niels, A quick reminder to readjust the bias whenever you replace the finals. 73 Evan AC9TU

THIS IS FOR HUMOR AND SMILES!!!!! Enjoy, 73 David ac9xh I came across this on another website .it was originally published in QST magazine 1967:

Ashhar and group, is there a manual or something resembling a spec sheet on the sBitx available anywhere? I am trying to figure out if it will operate down below the AM Broadcast band, there is a lot

niels,If you have a dummy load, try loading into that first to see if anything else is wrong before hooking up your antenna? after re-installing finals and checking surrounding components. Also, if

I’m having the same sounds… anywhere from 4 to 8 sounds then a several second pause, then starts again. Changing audio level makes no difference. I’ve never tried transmitting… just listened