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Symptom: uBITX doesn't recognize the straight key. Electrically, the CW key line checks OK. Solution: Go to settings->CW->Hand key[Select]

I have been a radio amateur since 2007. over the years I have made many contacts worldwide? using comercile radios like ts-450 and ic-703. because that is the easy way. nevertheless, I always thought

Adrian, check out kd8cec video on his swr meter that connects to his standalone signal processor. I think that is the functionality you are trying to achieve? The Nextion to sketch code is a little

I agree. The nanoVNA cannot do all of the many things an Antuino can do, and vice versa.? Nor does either one replace an inline SWR meter. That said, the nanoVNA looks like a very nice addition to

Tom, lol Snoring as a digital mode! I wonder if your brain in encoding some diagnostic information on the snore? Research funding? I wonder if the voiced/unvoiced decision could be ripped from CODEC2?

Th link did not get linked. Here is the linked link. https://youtu.be/TJSctUv5lUc?t=274

Hi, I don't if many people have added VOX to their uBitx, but here is a reason to be careful. Maybe a DSP VOX controller could be built to guard against accidental digital mode emissions. Kind of like

Oh sorry, forgot to mention. This is not an audio filter, but a second crystal filter chain on 4MHz while the CW wide and SSB filter is at 12MHz. Alex

Hi all, Jerry mentioned my efforts for a second filter for CW. Just to have an indication how it performs here is a link to a short youtube film

Rob, To answer your question, -35-40 is what I have measured using an SDR Play RSP2 and the spectrum analyzer software (this is the only tool? that I currently have that can get a low enough

I have 4 uBITX radios and the first one had stuck the left side relay early on. I replaced it with a stock component and it has worked fine. None of the other machines has had a problem. This relay

?A significant number of sound interface systems will have a TRANSFORMER here and there. It is important in most cases to provide DC isolation to prevent the transformer from dramatically changing the

The carrier to signal ratio needs to define the signal level as well. A 'Haaalllowww' is usually insufficient (though I use it all the time). You could download a wav file of two tone and play that

Hi, I just double checked the schematic. It looks like there is adequate DC blocking capacitors in the mike input circuit. Also, the mike input already has a DC voltage applied to power the

Thank you Leonard. This particular mic doesn’t have a preamp....so no chance of over driving. Dean

Hello i am using the 1.80 firmware from KD8CEC?on my ubitx with a 2X16 lcd display? and i have noticed the s-meter bargraph? is working only in Rx mode, but when i switch to TX gets stuck with the

Regarding a CW filter , a simple audio filter with 2 or 3 Amps from a Quad-opamp might be a simple start for good CW listening. There are many circuits on the Web. Frank??? ,??? EI7KS

Fantastic! Glad to see another 5" out there. 73 Mark AJ6CU

My reply is for limited use at audio level. Sorry. May not be relavent.

Why not use max7400 as a n lpf. It is a nice 8 pin dip and/or sm? Spend a while to study the datasheet. It can become variable lpf.