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Just ran the batteries as a test to see if my psu was too noisy it made no difference :-( Has Anybody out there post a video showing what the waveforms are supposed to look like are various points in

I also had L1 brake loose in the same fashion but luckily it hadn't broken it's wires yet, a little epoxy fixed the issue but it was a packing issue also.

Hi Adi, When you set the tuning range via the menu it is saved to EEPROM and retrieved during power up. 73, Allard PE1NWL

I have a sketch that does everything you are looking to do. It is a modification of Gene Marcus’ QEX article. If you are comfortable adding some wires and components it works great. In addition it

I must add I do have farhan's AGC inline as well and may be causing undesired affects

I was unable to make this work not sure what I did wrong only thing different was the PNP transistor. Maybe if someone has some pictures of what they did that would help me see what I did wrong. I

Hi Allard, Is it possible to save the range (from the menu) when power off? Thanks! 73! AdiYO2LIW

I did this too. That 12V regulator runs quite hot and wastes a lot of battery. I'll try find a switching regulator out of an old ADSL router or some other junk.. Another way to do it, is run the

So if it ever happened to b the wrong way it won't blow

I use a 3A diode and a fuse

Hi everyone, my bitx40 got sorted after plugging the 12 V supply the wrong way round. The damage was melting of the track front 12 supply to D7, rewired and new D7, a new 4148. The IRF510 and 2N2219

Hi gang, I just received my order for the BITX40v3 and during board visual inspection I noticed the board has been modified in the balanced modulator circuit. D15 and D16 and the 100ohm balancing pot

Hi Bill, EMRFD is the maximum collection of tech info for the homebuilders today and for some years to come. Something you may read is the clssic ARRL Handbook or, something different but easy to

All three of my toroids were glued down also … must have been quite a “forceful” packing to break L1 free! Bob KE7QEQ I wouldn't have most of my problems ... if I didn't have most of my

Gidday, Ordered DDS 29/04 arrived via DHL 02/05 in Sydney, Australia - thank you. ?This will go into my VFO BITX40. Two questions 1. which components do I remove when I connect the DDS output to

Thanks Jack, it looks like I will have to get serious about learning programming arduino.? -- Mike VK3XL

A drop or 2 of hot glue should not make too much difference. -- Mike VK3XL

Mine were glued down. S

My BITX40 arrived in good nick - but I wonder If I can make the board more drop proof. Is it possible to stick the toroids to the board with hot glue or epoxy? Or does that mess up the

Hi folks … I received my BITX40 today (my 3rd) and found that L1 had been torn loose from the board. It was rattling around in the plastic box. After examining the way the board, Raduino, and