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I think Allard's solution is likely minimal and acceptable. ?For not so minimal, here's somebody who has added sidetone injection at the volume control: ??/g/BITX20/message/27410 (

Are you using the most recent sketch?

I had looked at that one, but the fit wasn't quite right, delivery time didn't meet my need for instant gratification, etc... :-) I've had my cable installed since April and have been pretty happy

That might be a good argument to use the R output divider after the output multisynth. ?Would be interesting to see if a divide by two in R generates less of a second harmonic on the Bitx40, just a

Hi Michael, Yes, you're right, it's not a 100% perfect method, the diminished sidetone on initial key-down is a result of that cap charging up - I have exactly the same behaviour here. If you find a

I am stripping down everything to seek for the culprit. I see that sometimes when i speak louder the lcd dims a little, like if there is not enough power... but the power supp is 10A! i see it drains

50cm USB 2.0 B female panel mount to mini 5pin male right angle extension cable https://www.amazon.com/dp/B00NIGFUF8/ref=cm_sw_r_cp_apip_v6hAzLHm9KCMW Andrew Krause General Class Amateur Radio

Yep. That'll work. This probably will not work to measure the Si5351 crystal. You will get a signal, but it probably will not be correct. Measure at pin2 or pin3 of U2, but I would not recommend it

I didn't notice anyone mention these, but I do tend to miss things... Short adapter cables are available from Adafruit and Amazon that allow you to update the firmware/sketch without opening the

Hi all, ? I developed an own VFO basing on Si5351 and Arduino in 2015. I had the same question: Is the Quality of the oscillator signal good enough for a high quality SW receiver ? ? Searching

Hans, I took the code from??/g/BITX20/files/KE7ER/si5351bx_0_0.ino ( /g/BITX20/files/KE7ER/si5351bx_0_0.ino ) and replaced the final while loop with this: //

Send by PayPal $25 to hfsignals@... Not that it is for Arduino.

I like that Idea. I have noticed on another project some for of slight AM modulation on carriers and was suspecting of 3.3v power fluctuations (taken from the arduino 3.3v tap) Then Hans Summers in

I finally got all of the CW mods made to my BitX40 and it seems to be working fine using Allard's V1.16 code. ?However, I have noticed some strange behaviour?from the CW sidetone implemented using

Hi Art. The limits on the calibration was set to -8000 to + 8000 for my empiric values so you are getting (+) 8000 and that's top value. (My hardware needs +3670) Try to move the dial control all

Has anyone adapted bitx to operate on 6 meters? If so, can please provide links to the way to do it? Thank you

Pavel I use the function button under settings, calibrate lsb and it reads -8000 ppl. All good? Can't change it. Not that I need to as it is on freq. sorry for my confusion Sent from my iPhone

Here is a description: All parts except a couple caps 0603 SMD. All parts Available from Mouser, usually in stock. I2C connector top Left, 4 Pins +5, Ground, D, Clk and bypass cap. Power and VFO

Now I realize your question in deep... sorry. I removed the old (legacy) way of calibrating by shorting A2 (CAL_BUTTON) when powering on the radio in favor of the new via the FBUTTON while the radio

Pavel Ok got it. I am using your code and library (mcu). The freq is spot on and when I look at the value of the lsb setting it reads -8000 ppm. Thanks Art Sent from my iPhone