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Hi I was using my Easy Digi card to interface my iPhone to my BITX40. I built a couple of these to interface HTs to iPhones when I was playing around with 2M SSTV. I posted two videos about this

Hi! Simon, I suggested a cap that is in series and not to ground. The cap c122 charging when the TX voltage came on was the issue. It helps if there is a 1K resistor parallel to C107 to

It would also be nice to have the Coil and Transformer winding details that have been asked for by many already!!!! Ray Koster G7BHQ

As much as I'd love to see a kit for the uBitX released it may not be feasible in the immediate future.? Instead it might be more realistic to create and release things like PCB gerber files, BOMs,

Thanks Jack. BTW - I thought that your name seemed familiar. Looking back in the library I see that I have from 30+ years ago: C Self Study Guide C Programmers Library C Programming

see message #21536 Kelly Jack wrote:

Hi, Tried this and it didn't work for me. I cut the trace between R106 centre pin and R38. Scope indicated that the carrier burst was still there also. I am wondering why?a new cap in the path to

Well, got my Bitx40 over the weekend, Wired it up and it doesn't work. That is, the hiss from the speaker can be volume controlled. The display has all blackened row of pixels. Tuning will not

Hi Stephan, Thank you for the link, I downloaded the library and the sketch compiles nicely! 73, Elia M0ZHN

Hi Elia, look into the comment in the raduino.ino source... https://github.com/afarhan/bitx40/blob/master/raduino.ino ...there you can read: "[...] You can download and install it from

Hi Allard, Where can I find the Si5351 library please? There are several libraries available and I feel a bit confused :( 73, Elia M0ZHN

Thanks Ashhar, The corrections I made are only related to the calibration routine and the newer Si5351 library. No other bug corrections or improvements. I left the rest of the code in tact as much

I came across a thread discussing the Easy Digi circuit for connecting to the radio audio. Has anyone in the group investigated the use of the bitx40 for digital modes further? These are friggin

Both you gentleman were really helpful, I sincerely appreciate your replies. I am not a exactly noobie or a novice at this sort of thing. Built a few Knight Kits in the day. I tinker with the new

I wrote up how to add 80m TX/RX to the BITX40 with some pictures as to how to do the modification. I'd love input on how to get the Raduino to tune down to 3.8mhz. I use the QRP Labs VFO which will

The BITX20A and the BITX17A are older adaptations of the original BITX. The price includes a readout and a case. The assembly and use manuals by Arv, K7HKL are in the files section (unless someone

Mike, I remember Farhan commenting on the quality and carrier leak etc of the discrete mixers he implemented , as superior even to Minicircuits' mixers. I suggest that perhaps you might use those

The LO injection would have to be 10x the power, so I assume you'll need a gain stage on the LO. ?And then evaluate the IF amplifiers to see if they properly deal with the higher level signals that

Most folks are here are buying the Bitx40 from hfsigs.com at $59 these days, including shipping from India. ?Comes mostly assembled for 40 meters. ?Takes about ?a month to arrive. ? But the

I have several MiniCircuits high level (+17dBm) JMS-1H mixers.? Would anyone care to comment on? pros/cons in substituting these for the discrete component mixers in Farhan's ?Bitx design (assume