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Re: Power supply for uBITX ... 12V 3A
Arv Evans
Most switching supplies respond well to having a 0.1 mfd and a 4000 mfd capacitors across the output, right at the power supply end of the cable. It is difficult to get noise through that combination. Arv _._
On Tue, Mar 16, 2021 at 7:58 AM <mikebw+groupsio@...> wrote: I don't personally have one, but people who put these inexpensive switching power supplies on oscilloscopes to look at their output often recommend the Mean Well brand, which is almost twice as expensive (USD33) compared to the generic brands (USD18) but still quite reasonably priced.
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5.0" Nextion for uBitX V6
#ubitxv6
#nextion
#ubitx6-help
I'm wanting to upgrade to a larger Nextion and I came across this 5" one.
5.0" Nextion NX8048T050 TFT HMI USART Intelligent Touch Display LCD Module 16M  5" Nextion Display Would it work with the uBitX v6 and would it be much harder to use than the 2.8 Nextion? Also, would a 5" Nextion be able to display more than the 2.8" or is everything on the screen is magnified? -- '72 Aaron Scott
QRPARCI# 16443
GQRP# 16389
4SQRP # 1080
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Good place to tap for PTT-OUT
#v5
Rob French (KC4UPR)
Hi,
I'm looking to add a PTT-OUT to the back panel of my uBITX, to control e.g. an amplifier or a switch to isolate an external SDR during transmit. My thought is to grab C154/D11 or one of the other filter-switching relay circuits. Those look like easy places to tack a short wire to without having to completely disassembly my uBITX. Two quick questions: (1) Dumb question... but that junction does provide what I want, right? i.e. +12V on transmit. (2) Any downsides to tapping the +12V on transmit, from that location? e.g. some RFI effect Thanks, Rob KC4UPR
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Re: Power supply for uBITX ... 12V 3A
mikebw+groupsio@...
I don't personally have one, but people who put these inexpensive switching power supplies on oscilloscopes to look at their output often recommend the Mean Well brand, which is almost twice as expensive (USD33) compared to the generic brands (USD18) but still quite reasonably priced.
https://www.amazon.com/dp/B0109IMRPS/ — MEAN WELL LRS-350-12 348W 12V 29 Amp Single Output Switchable Power Supply The Mean Well LRS series is fine for amateur radio use, about half the price of the Mean Well RSP series that includes remote sensing (which would be of little value in this application).
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Re: Power supply for uBITX ... 12V 3A
mikebw+groupsio@...
I've had no problems with RF noise from this supply:
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Re: Are all the Bitx version fundamentally the same?
Evan Hand
Eli,
Have you tried the "Fake It" setting in the WSJT-X setup? It adjusts the radio frequency to allow for a wider passband. An example would be moving the received (and transmit) frequency to allow get around the narrow SSB filter. Opens up using frequencies above 2.8KHz or so. A good and detailed explanation of the steps to use FT8 (or other) digital modes with the µBITX 73 Evan AC9TU
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Re: Are all the Bitx version fundamentally the same?
Robert AG6LK
Eli, What type of USB connection is on the uBitx v6, is the normal USB connector?
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Re: Are all the Bitx version fundamentally the same?
Eli, KO4LGS
Robert,
This is how I set up for FT8. I haven't tried much else. All of this is on a windows PC...although I have a rasperry Pi I may switch to. I am doing the following: 1. Installed WSJT-X- https://www.physics.princeton.edu/pulsar/k1jt/wsjtx.html 2. Installed a timesynctool- https://forums.qrz.com/index.php?threads/wsjt-x-and-setting-windows-10-clock-seconds.592212/ 3. Connect uBITX to PC via USB cable 3a. Check Device Manager for COM port 4. Connect uBITX to PC via USB Sound Card- uBITX Mic to PC Earphone/uBITX speaker (front panel) to PC Mic 4a. I had to "customize" the Audio cable from the USB soundcard to uBITX- https://groups.io/g/BITX20/message/84452 5. Turn On uBITX (with antenna connected) 6. Check Settings (configuration) in WSJT-X- 6.a Radio Rig: Yaesu FT-817 Serial Port: COM8 (based on step 3, not that this can change if you plug in to a USB hub instead) Baud: 38400 Data Bits, Stop Bits, Handshake- All Default PTT Method; CAT Mode: USB Split Operation: Rig PTT method: CAT 6b. Audio Input: USB Sound (step 4) Speakers: USB Sound (step 4) 7. Cross fingers.... Actually, this worked well. WSJT is doing the PTT no trouble. I probably could have used the sound ports on my PC as well, but I had the USB device lying around, and could limit the sounds going to it while still hearing my PC through regular audio. Contact me if you need more information. Regards, Eli KO4LGS
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Re: Are all the Bitx version fundamentally the same?
Jerry Gaffke
While we are on the subject of USB cables, be careful of those meant only for charging.
toggle quoted messageShow quoted text
Many USB cables these days save $0.05 worth of copper wire by not including the data wires, just power and ground wires. These cables often provided free when you buy some electronic device. More than once, I've spent hours chasing trouble when trying to download to a Nano only to find that I have grabbed the wrong cable, which subsequently gets thrown in the trash. Given the non-informative error messages you get from the Arduino-IDE, it's very easy to get hung up on this. Jerry
On Mon, Mar 15, 2021 at 12:46 PM, Evan Hand wrote: Jerry and Arv,
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Re: Let the upgrades begin!
#ubitxv6
Eli, KO4LGS
Nice set up. How did you connect the ATU antenna feeds to the uBITx?
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Re: Are all the Bitx version fundamentally the same?
Evan Hand
Jerry and Arv,
Thank you for the corrections. I did get the mini and micro mixed up. I guess the best bet is to wait for the Nano to be delivered and then match the connector on the board. Robert Hopefully, you have not ordered the cables yet. I will delete the message that is in error so others are not confused. 73 Evan AC9TU
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Re: Are all the Bitx version fundamentally the same?
Arv Evans
Jerry I have older Nano boards that have the Mini-USB connector, but the latest purchases all have the Micro-USB connector. While this does make the Arduino use same cables as cell phones, it also adds to the confusion. USB-Mini cables are getting more and more difficult to find and purchase. Arv _._
Good info.
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Re: Are all the Bitx version fundamentally the same?
Jerry Gaffke
Good info.
toggle quoted messageShow quoted text
A minor correction: The Nano has a USB-Mini connector, not the USB-Micro that you find on most Android phones. Jerry, KE7ER
On Mon, Mar 15, 2021 at 10:33 AM, Evan Hand wrote: I have an EasyDigi board that I really only use the two isolation transformers. For PTT I use the CAT capabilities with a Yeasu FT-857 radio setting. The CAT connects through the USB port on the Nano and the PC. The cable is USB-a on one end, and USB-Micro on the other (NOT the most recent USB Mini for android phones). This is with the WSJT-X software.
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Re: KA1 always on?
Rafael Diniz
Thanks Evan - will do the checks!
toggle quoted messageShow quoted text
On 3/15/21 3:04 PM, Evan Hand wrote:
Rafael,
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Re: KA1 always on?
Evan Hand
Rafael,
The code you provided looks correct, and the TXA output should be off when one of the lower bands is selected. Can you verify that the TXA signal on the R151 / C153 junction is close to zero volts (below 0.3 volts)? If so, then I would suspect that Q17 is shorted. If it is always high, then you may have a Nano issue. Then there is always a possibility that a solder bridge or short is in the signal line from the Raduino to the Mainboard. Verify that the Raduino is plugged in properly. 73 Evan AC9TU
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Re: KA1 always on?
Rafael Diniz
Hi Evan,
toggle quoted messageShow quoted text
Thanks! It is the v6. I changed the firmware - I double checked the code I'm using, and " digitalWrite(PIN_TX_LPF_A, 0);" is there in the lower bands. https://github.com/DigitalHERMES/ubitxv6/blob/master/tuner.cpp Still, I can measure KA1 is on. Rafael
On 3/15/21 2:39 PM, Evan Hand wrote:
On Mon, Mar 15, 2021 at 12:11 PM, Rafael Diniz wrote:
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Re: KA1 always on?
Evan Hand
On Mon, Mar 15, 2021 at 12:11 PM, Rafael Diniz wrote:
Is the KA1 lpf to be always on even on 40m and 80m bands?Rafael, The answer depends on your mainboard version. For a v6 board, the answer is no. Have you changed the firmware in the Nano replacing the stock firmware? We will need a little more detail to answer your question. 73 Evan AC9TU
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Re: Power supply for uBITX ... 12V 3A
Evan Hand
Bob,
It is a switching supply. Switchers can cause noise in the HF range. If you have purchased one, can you comment on the noise generated, if any? 73 Evan AC9TU
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KA1 always on?
Rafael Diniz
Hi all,
Is the KA1 lpf to be always on even on 40m and 80m bands? I feel there is something strange... Thanks, Rafael
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Power supply for uBITX ... 12V 3A
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