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Ok, got it. ?Looks like the SI5351 that was required before is no longer needed an just the pinchangeinterrupt is the only thing needed. I think I’m good now.? Thanks for your help guys.? Curt

Hi Mike -? Thanks for this. I have spent the last few hours debugging this and I think the conclusion that you reached in the Antenna Analyzer is probably the same conclusion that I reached in my

Thanks Ashhar...

And that file (README.md) is included in the .zip file along with the 'sketch'.

Since the VFO and Antenna analyzer are closely related you may find this email chain useful. Mike K5ESS Sent: Tuesday, November 28, 2017 11:50 To: [email protected] Subject: Re: [BITX20] AD9850 Issue?

OK Gert, good to hear you found a way to work around the situation. Strange though that a pull up resistor isn't sufficient and that you need to hard wire it to the +5V rail. 73 Allard PE1NWL

Instead, you can use 4K7 or some such pull up, Please check. regards Sarma

Hi the problem is solved in an brutal amateur way : the solution with a resistor did`n work so I connected A2 dirctly to +5V. Now the ability of calibrating the offset is lost but that?s a thing I

https://github.com/amunters/bitx40/blob/master/README.md

thanks for taking the time to go through that!? gordon ________________________________ Sent: Wednesday, November 29, 2017 3:38 AM To: [email protected] Subject: Re: [BITX20] Help me understand the USB

Lets take a concrete example. An lsb signal generated at 12 mhz carrier, now considee that it is modulated with a 500 hz carrier, it produces a signal at 11,999,500 hz. If the modulating carrier is at

Can someone answer this question for me. The latest sketch 1-27-2 has switching for UPS and LSB by pressing the function button (VFO sel. a/b) if I remember right. How is this accomplished by the

As I had mentioned above this is on a different machine so I’m starting over fresh. That’s why I’m looking to find out what libraries need to be installed.

But remember, Clark, that the "carrier" is the BFO frequency. We can adjust that to be about anything we want within reason. Changing the center frequency changes the position of the sidebands. In a

If you didn't delete the old version before you installed the new one, the libraries should still be there. Actually the added libraries (the ones you installed) should be in the project directory

Hi guys, I’m running the latest version of the Bitx40 firmware, I believe it’s 1.27.2.? Tonight I had a catastrophe with the laptop that I typically use to do the upgrades. I installed the latest

The Bitx uses a Double Balanced Modulator (DBM). If it's truly balanced it doesn't generate a carrier, just the two sidebands. If it didn't, it's unlikely the crystal filter could remove the carrier.

Wow, thanks for the all the replies! It makes good sense now - understanding how the crystal filter works really helps me wrap my head around the whole thing. Allard, thanks for that link - it is

Congratulations to you and your daughter getting your tickets. I wish her luck on the general class exam. I would build the bitx stock and run it for a few weeks, then upgrade to one of Allard's

Somebody already has. Michael (WA6ISP) did it, I think. There's another one out there somewhere too. I'm sure Michael will chime in shortly. Vince. -- Michigan VHF Corp. http://www.nobucks.net/