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Part of the mistery solved... If you remove R253, you can still hear CW side tone on speaker, because Arduino is using PWM pin for generating audio. That pin behaves like an antenna, and signal from

Sorry to ask but I been offline for a few weeks and the subject seems to have died out (after reading past posts). So is there a final solution for the spurs/harmonics for the V3 uBitX? * Axicom

I just ordered a couple of these from Adafruit. https://www.adafruit.com/product/3481 Dave - AI6K

Does anyone have a link to a 10K pot I can use for volume control for the uBitx that has power switch. Oddly the one that came with the kit went bad on me. It just freaks out when I touch it and can

I've got to think about that... I want the person in phone mode to hear my cw. If they're in USB, don't I have to transmit CW-reverse to get into their passband? Ed - aa2mz

Thanks, that was it... I think I'd changed its default in the defines but without changing the software version number, the eeprom didn't get updated.

Actually it is fairly easy to modify the Raduino code to put a timer in it to turn off the xmit after some time.

I have two v4 boards that are completely deaf. Haven't spent the time yet to do any tracing. Like you, I've put this on hold indefinitely. Dave - AI6K

Original thread was "RX Trouble". ? Sort of a rant here... I am not superstitious but beginning to believe my uBITX (both factory & CEC firmware) is cursed. Have had issues since first power-up, but

I ordered far too many of the 1K/3W resistors for this project.? I've enough of the passive components plus D1(BAV21) for four additional builds.? ?I've made up four kits consisting of 20 1K/3W, 1

Moving the BFO to the other side of the 12mhz crystal filter can make a difference, as the skirts of the filter are shaped differently. Also, moving the VFO to the high side (on the Bitx40) or clk1 to

Ty, make sure semiQSK is ON in the SETTINGS menu. If the radio is in LSB mode, it will switch to CW automatically as soon as you push the CW key. (if it's in USB it will switch to CWU). Press PTT to

Ty CW always uses the USB mode. Until I recently upgraded my uBitx software I had never seen a LSB CW mode. Why that was implemented I don't know. Don't bother about it no-one should ever use it.

Hi all, I've had my bitx40 working for a few weeks and now have implemented the??amunters / bitx40? goodies. Thank you developers and testers! I was surprised that nothing happened with I pushed

Am 30.10.2018 um 06:43 schrieb Raj vu2zap: Thanks Raj ! Had again to correct the calibration which was exactly 1 kHz off. After playing a while with Sunils calibration method I got it calibrated on

Hi Dave, Obviously unattended operation is allowed where you live and are licensed. Some of that is allowed where I live too but the problem you have outlined is the main reason I don't do unattended

Get a smart outlet (something that you can control with Echo for example) and shut the outlet off if you have a problem Kevin K5KDT wrote:

Hi Timothy http://www.hfsignals.com/index.php/2017/11/23/bitx40-circuit-description/ - C103 , 3 pads between xtal and T4 on the PCB for the trimmer. If those boards were an early batch (or you have

And, of course, the Elecraft K2… Sent: Tuesday, October 30, 2018 5:48 PM To: [email protected] Subject: Re: [BITX20] Need 12.000 MHz crystals for the BITX40 #bitx40 #bitx40help This is the same

Hi, I use an old laptop for FT8 with my uBitx and works perfect (CAT via USB). But sometimes my computer hangs (BSOD) and, when the uBitx is in Tx, the radio keep transmitting. I use this computer via