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The ADC is 8 bits, so same as the RTL-SDR. Maybe the SDRPlay with the 12 bit ADC?? The dual receiver version was $270.? Might be a good compromise, as well as with an automatic switch (MFJ makes

Good question.? I have the DS4202C - 4000 series?http://www.hantek.com/en/productdetail_3_4163.html Someone posted a link to one site that allowed renting a analyzer.. a little pricey could do it

Dave, Do you know the ADC specs for your scope?? It could be a dynamic range of the input again.? 8 bits are fine when there is a voltage divider to scale the input so that it fits on the screen.?

I actually did replace all of the relays with axicom relays.? I bought some parts to build an external filter to see how that does (not due to arrive for a while).? I'm transmitting SSB when doing

Bob, If hfsignals shipped that Raduino to you along with the Bitx40 main board, it probably did get stock Bitx40 firmware installed, not uBitx.? ?I would hope. Jerry

21.5mhz is the third harmonic of 7.15mhz, we can expect some trouble there, though -20dBc is worse than I recall seeing on measurements posted here for other uBitx's. Moving to the axicom relays might

So I remeasured my ubitx this time with my oscilloscope FFT.? Not sure how accurate those are? It shows a lot less spurs but does still show a spur only -20db down when transmitting at 7.150MHZ

The only problem with the audio amp on the v3 boards was that they had a run of bad TDA2822 clone chips. The TDA2822's with a "WX" marking may (or may not) fail when powered from 12v, if you catch it

Thanks. I also wanted to make sure they sent me the right stuff. I'll finger out the circuit and plug it in. I also want to put a little metal heat dissipation on the 7805 tab so it will run a little

Bob, I think you have it figured out. The 5 pin cable goes on the end of the 16 pin connector that's nearest the 7805 regulator. They only build one version of the raduino, one that plugs into a

Just got the BITX40 today. I had the uBitx before and sold it to a man who wanted to run digital. It was a dream to put together, no problem whatsoever. But the picture on the wire-up page for the

Thank you Steve. Setting keyer to "hand key" did the trick. Good that I did that before trying to rewrite the code. Bob W7HNV

Bob, ?BITX and BITX40 are different radios.? Which do you have? -- www.bitxmap.com ( http://www.bitxmap.com )

Got a new uBitx 40 and have a question about connecting it up. Connecting up the Raduino, it says to plug in the 5-pin connector. I see the 8-pin connector so no problem. But no 5-pin connector. Does

Andy See if you have sidetone when using cw. If you don't have a key, you still need that external 4.7k resistor anyway. Then put a short across the key input to listen for sidetone audio. If none,

I will be following with interest.?? I managed to trust the connector wiring of the power wire loom, and should have not, as it had power and ground reversed at the connector, and I shot reverse

Hi Group: I am getting no audio out of my ubitX and have tried the suggestions posted here in another string. 1)? RX has +12V at R18 & R38. 2) TX is low at R28 and R40 3)? I have tried SPH out

https://vk3hn.wordpress.com/2017/02/02/arduino-and-si5351-dds-vfobfo/amp/ I got excited and damaged my pre-arduino VFO but managed to do what this cat does here. Get an Arduino (or whatever

Hello, I am looking for the latest updates links for the BIOS, Assembly, LCD upgrades for the uBitx revision 3. Thank you, Misha LeBlanc VE9GIS

er...? Make that nice project TOM !