开云体育

Hey, I'm new here. I just finished assembling my ubitx, and I was disappointed to find there was no audio. I double checked all my connections, and everything seems to be wired correctly. I saw

Has anyone measured the bandwidth of the uBITX filter ??? I have tried it two ways. one with a SA/TG at the 12 mhz filter, and another by feeding in a audio tone from 200 hz to 2800 hz into the mic

That's the other way to do it. This JackAl board is just sampling the audio that we normally hear when listening to the radio. I'd call them both "SDR". Some may disagree. Jerry

Nope. Often in SDR, they use the I and Q channels to retain information regarding the phase of the local oscillator vs the incoming signal, this is then used digitally in the computations to

Yes Ron, The SDR implementation needs an additional quadrature sampler, from reading the documentation the rest of the hardware is already there in the uBitx.

I need some education... Don't you need i+q signals for SDR? rOn

Hello Bo, Have you checked the volume level you are feeding the uBitx? The mic amp isn't expecting more than 40mV. Also did you have any attenuation turned on the ICOM? The manual says it has settings

The Teensy 3.6 has a floating point unit and can do FIR filtering and more at that sample rate with the audio library. So the IIR filters used here, which are at least an order of magnitude more CPU

I think I may be confused or missing something. Why use usb on blue pill. Like I have always used stlink or ftdi ? to program with . If using usb to communicate with could you not just cut the 5v

Sounds like somebody just made a wild guess at how wide. Or didn't have some of these other issues fully figured out. Did anybody ever evaluate the failure? A skinny trace with feedthroughs such that

I've made some successful contacts on FT8 and WSPR using my Raspberry pi and posted a guide on how to do it. However, monitoring its output on my Icom 7300 I see: ubitx freq 7074.0,? audio

I had a skinny trace fuse on a CRK-10A QRP transceiver which did burn through, but not before it fried virtually everything else on the board. I wouldn't trust a skinny trace fuse in a circuit at

The relay trick is good, especially if running a kW. At 10W, semiconductors are fine. At a minimum, I'd just make it series schottky diode into the main uBitx rail with a 0.5A fuse there. I have a lot

My prefered way uses a diode and relay.? Relay has zero voltage drop. IF the diode does not conduct, ? ? then power to the relay does not happen and power to the board never happens. When the

Jack Perfect art Sent: Tuesday, May 22, 2018 3:38 PM To: [email protected] Subject: Re: [BITX20] JackAl Board Debut Art: The JackAl board expects to see the display with the following profile:

With 406 of those Mini-kits (AGC and Click) requested as of today, I don't think I'll have any problem keeping "out of trouble" in the upcoming days. 73 Kees K5BCQ

Anyone happen to have a matrix of the various options ?? (silly question). Kees: I have a great idea for a little project that will keep you out of trouble for a day or two... Jack, W8TEE

Art: The JackAl board expects to see the display with the following profile: Interface??????????????????? 4 wire SPIPower supply type ??? 3.3V Touch panel type??????

You also forgot KB1OIQ who went with I2C for display and added keypad and voice output suitable for low/no vision operators.? Call that #9. I'll be #10.... MIne I may or may not publish when done be

Allen Sounds like you have a lot of good stuff...I'll have a look.? I'm about 1/2 finished on a Raduino board using the Pill. I'm developing it in DipTrace, which I prefer over Eagle and KiKad. In