开云体育

Mine made it to CINCINNATI HUB, OH - USA Yay! Now they hook up a team of horses to the coach and start the arduous journey to Oregon. They say I might get it on April 28th.

Joel
N6ALT

I think there is an issue with the CW sidetone frequency (pitch) with the sBitx v2 (running on a DE).

When you first start the sBitx program, the pitch is restored to the last saved value. If you transmit the CW carrier is on the VFO frequency as seen in another receiver and as expected.? If you change the pitch, the CW carrier is now shifted by the amount of the change.? For example, say that the VFO frequency is 3.550 MHz and the pitch on startup is 600 Hz. When transmitting, the CW carrier received by another receiver is at 3.550 MHz as expected. If you change the pitch to 400 Hz, the CW carrier is now 200 Hz lower at 3.549.800. I don't think this is right.

If you then shut down the program and start it up again, the VFO is at 3.550 and the pitch is at 400, but the transmitted carrier is now back at 3.550 MHz. If you change the pitch back to 600, now the transmitted CW carrier is at 3.550.200.

I don't think changing the pitch should change the transmitted CW carrier frequency, it should always be at the VFO frequency. Changing the pitch should only change the pitch of the sidetone and the pitch of a received signal. If the received signal is at the VFO frequency, the received tone should be at the pitch frequency. Changing the pitch should only change the (old analog analogy) BFO offset.
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73,
Mark, N8ME

I have in front raspberry pi and the display is on the way but looking at the picture boards (which I want toto buy it ) noI know if you need something else than?box, display, mouse, keyboard, microphon?

If you type \help in the original GUI, it shows that the command to change the CW input device is \cwinput [key|keyer|kbd]. However typing \cwinput key does not enable a CW straight key.

If you change the CW input device in the HTML GUI, it send the command CW_INPUT KEY and the input device is switched. If you type \CW_INPUT KEY (or any other option) in the old GUI, it complains 'Invalid setting:'


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73,
Mark, N8ME

With which cable the electronic card connects to raspberry pi?

We didn’t think to try and measure the oscillator. That would have been a good thing to try. When we tried to tune in a reference signal from the service monitor, as near as we could tell the sBitx was off 20 to 40 Hz. We looked at the transmitted signal for purity, but I didn’t check write down the frequency. As for purity, it looked like the worst case spurs and harmonics were down around 45 dB.
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73,
Mark, N8ME

Hi Scott,

I tried the input mapping command, and it works like a charm.? Thanks!

I am still trying to get the Sbitx application to start reliably.? I continue to get ALSA error messages on startup.? I have attached two error log files I captured.? Any more suggestions?

Thank you again!
73
Evan
AC9TU

FYI, last night, after I demonstrated the sBitx DE with V2 software to members of the Dayton ARA (DARA) TNG*, ?Tom Holmes (N8ZM) and I used it to participate in the ARRL Frequency Measuring Test.

During the test, after a 3-minute call-up, the source station transmitted a 1 minute carrier near (but not on) the call-up frequency. There were two transmitters: K5CM in Texas and W8RKO in Ohio (about 20 miles from us). Each transmitted ?once on each of 40 an 80.

We used a BNC tee to feed the antenna and the output of a HP 8920 Service Monitor to the input of the sBitx. We adjusted the output of the service monitor to be similar in strength to the transmitting station. During the one-minute carrier period, we adjusted the frequency of the service monitor output to zero beat the carrier (by ear). We reported the frequency of the service monitor.

*TNG - Thursday Night Group: This is a group of tech-oriented hobbyists who meet most Thursday evenings at the DARA clubhouse to work on various projects. The clubhouse has an array of test equipment.

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73,
Mark, N8ME