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Re: For Sale Ubitx version 4 and enclosures
¿ªÔÆÌåÓýHi, Art,Interested in your version 4 for sale. I can do Pay pal. Reply to erressler27@... Elliott W3YEP
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Re: Bitx arduino reprograming
Elmar V?ller
Doug,
after some hours the upload was done ¡ª(ch340 drivers also loaded) but still nothing on display.
now the joke: connected to the bitx board rx and tx was working but only on a single frequency and not
changeble with the 10 k pot. -do you have any idea what¡¯s going on ?.?
?
Gesendet:?Dienstag, 10. Juli 2018 um 15:29 Uhr
Von:?"Doug W" <dougwilner@...> An:[email protected] Betreff:?Re: [BITX20] Bitx arduino reprograming Elmar,
None of us were born knowing how to do this.? I will try to explain with more detail to see if we can get you through this.? Let us first see if your computer is recognizing the nano.? This will help determine if you have the correct driver. First go to your device manager.? In Windows 7 go to control panel, then systems and security, and finally device manager.? Most likely you will have one of the two situations described below. Find a heading labeled Ports (COM & LPT).? Do you see Arduino Nano listed?? If so, write down the port number shown after it. If you did find the Nano in that section you have the driver.? Now go to the Arduino IDE (the program you installed to compile and load sketches) and check the following under the Tools tab at the top:? For board make sure it shows Arduino Nano, select it from the list by clicking the arrow.? For port make sure it shows the port number you found in your device manager.? Once you have the board and port selected you should be able to upload the sketch. If in your device manager the Nano does not show up under ports it is probably under Other Devices.? If that is the case you do need to install the driver.? That is also a relatively easy step but that will be for another post if you need it. Let us know what you find. -- |
For Sale Ubitx version 4 and enclosures
Selling my unbuilt Ubitx version 4 - have a Ubitx version 3 and a bitx and don't need a 3rd one. The box was opened to inventory the parts only.
Also have 2 of the latest enclosures, Red and Blue, from AmateurRadioKits that are excess also. Accept PayPal and shipping in US only. Interested please send a private message to olson339 at comcast dot net. Ubitx $105.00 Enclosures - $38.00 each 73 Art - N2AJO |
Re: BITX QSO Afternoon/Evening, Sunday, July 8, 3PM & 7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere.
John P
On Mon, Jul 9, 2018 at 09:29 AM, Howard Fidel wrote:
I would be in favor of adding a frequency on 20 MetersThen feel free to suggest one. 40 meters is the band of choice as this was started when the only game in town was the BitX-40. As I don't operate on 20, I have no idea of what might be a good frequency. ? -- John - WA2FZW |
BITX QSO Afternoon/Evening, Sunday, July 15, 3PM & 7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere.
John P
BITX QSO Afternoon/Evening, Sunday, July 15, 3PM & 7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere.
Join us as we make contacts with our BitX-40s or uBitXs or anything else on 7.277 MHz in 40 meters! This is a worldwide event for BitX40 (and other QRP)?stations starting at 3PM and 7pm in each time zone. To participate, call CQ BitX on Sunday, starting at?3PM and/or 7PM?your local time. The BitX QSO Night continues through the evening and conditions usually improve after sunset, so it is worthwhile to participate later in the evening. Suggested Best Operating Practices: Work at QRP power levels unless conditions require more power. Report your QSO's, discuss propagation, noise, signal reports, audio reports, antenna type, etc. in this thread. This is an undirected, scheduled event.? The BITX QSO Night relies on you to call CQ BITX to initiate contacts with other stations, so warm up that final and transmit a few calls on Sunday evening.? Talk to you then! |
Nextion 3.2" Display from Amazon
#ubitx
V Zecchinelli
I am a bit new to the Nextion display and there seems to be many choices out there.? Can anyone tell me if this display would be compatible with CEC firmware ?? If not could you provide a link?? At $30+/- I want to be sure what I am buying is OK.
Thanks, 73 Vince N1VIN |
Hi Allard!
Thank you very much for your help! I was ready to post the solution you found and the reason it happened, but you beat me to it. I had the 10 nF cap installed for debouncing and RF bypassing without taking in consideration the fact that internal pull up is about 50 KOhms. I will try to see what is the behaviour with the modified software and the cap installed and play a little with the delay time. It seems we might be able to shorten the delay to something like 20 msec. Anyway I really like the elimination of the RF burst provided by the new firmware. -- Ion VA3NOI |
Hi Ion,
toggle quoted message
Show quoted text
that's great news! The explanation is as follows: The Arduino input pin to which the FB is connected, is normally HIGH (5V) when the FB is not pressed. However, due to the extra 10 nF capacitor you added, it may take a few milliseconds before the voltage reaches this level. So, at power on, the input was still LOW, which made the Arduino "think" that the FB was pressed and therefore it executed the "restore factory settings" routine each time when you switched on the radio. The extra 100 ms delay that I included in the sketch allows the input levels to settle before the setup routines are executed. Thanks for your reporting this issue and for confirming the solution. I will include this improvement in the next Raduino version v1.28. 73 Allard PE1NWL On Thu, July 12, 2018 04:58, Ion Petroianu wrote: > Hi Allard! > Did not have the patience to wait until after the weekend. Opened the > enclosure and uploaded the modified sketch. > At the same time I noticed I had a 10nF capacitor in parallel with the FB, > so pulled that one out too. > Now the radio works very well with the firmware 1.27.7. > I have to get the time to do the hardware modifications to take full > advantage of the new firmware (fine tunning, split and RIT). > Thank you very much for your support! > 73 > Ion > VA3NOI > |
Re: Inexpensive eBay Amplifier Kits
Here is a comprehensive build of the cheapo Chinese amplifier with a circuit diagram and confirmation that it works too!! On 12 July 2018 at 07:32, Michael P. Rioux <mike@...> wrote:
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Re: Inexpensive eBay Amplifier Kits
¿ªÔÆÌåÓýI¡¯ve built two of the Hardrock 50¡¯s. They are great amps and pretty bullet proof. I¡¯ve used them on several trips outsidethe USA and they¡¯ve done a great job of getting my KX-3¡¯s signal out. I expect it will do the same for my uBitX if I ever decide on what display and cabinet to use¡.. Complete integration between the Hardrock and the ubitX should be doable the same as between the Hardrock and the KX-3. Too many projects, too little time. 73, Mike W1USN
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Re: Inexpensive eBay Amplifier Kits
Just my 2 cents. After getting two versions of the "cheapbay" amp I can say the best thing I did. Bought a proper kit like a WA2EBY and built it.The Hardrock 50 was also a great amp but the cost is pretty high. I have not used a HFpacker but know a few qrp guys that swear by them as well. If you really want 100W look at the HLA-150. I have had much better luck with building a known kit then trying to save a few bones on the cheaper kits with next to no info on them. In any event best of luck. ?N8DAH |
Re: Inexpensive eBay Amplifier Kits
I just received info that ebay will pay back all money as the trader had not provided any postal tracking number. Warning for the trader named kiss_buy. He seems to be on all major shopping sites.If a trader do not provide you with a registred postal number cancel the order by return. Inform the shopping site and if used PayPal accordingly.
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Re: Inexpensive eBay Amplifier Kits
¿ªÔÆÌåÓýI built the 70 watt model. I changed
the 2 IRF530s to 4 IRF520s. The IRF530s oscillated and failed
quickly. They also run very hot. The IRF520s run much cooler (2x
as many junctions) and are stable putting out 50 watts on 20
meters. The output on 15 and 10 is less, but the uBitx puts out
less on those frequencies. I am working on getting it working on
all bands, but for now I just use it on 20.
Howard On 7/11/2018 8:42 PM, Richie Chambless wrote: The 45 watt and 70 watt amps use the IRF530, and I own both. They do work, but not for long at the advertised power. It¡¯s very easy to push too hard on the drive and blow the FETs. The 45 watt version only takes 10 milliwatts of drive to get full power, so it can be connected directly to the BitX 40 T/R relay with a 3 to 6 dB pad (bypassing the PA). You can get about 25 watts out on 13.8 volts. The 70 watt amp needs about 1 to 3 watts of drive to work, but can produce 40 to 50 watts from 80 to 20 meters. The output falls off sharply after that. Either way, but some extra IRF530s... you will need them!
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Re: Inexpensive eBay Amplifier Kits
The 45 watt and 70 watt amps use the IRF530, and I own both. They do work, but not for long at the advertised power. It¡¯s very easy to push too hard on the drive and blow the FETs. The 45 watt version only takes 10 milliwatts of drive to get full power, so it can be connected directly to the BitX 40 T/R relay with a 3 to 6 dB pad (bypassing the PA). You can get about 25 watts out on 13.8 volts. The 70 watt amp needs about 1 to 3 watts of drive to work, but can produce 40 to 50 watts from 80 to 20 meters. The output falls off sharply after that. Either way, but some extra IRF530s... you will need them!
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Basic board test: 130ma @ 12.5 volts
#ubitx
Hello!! New uBitx V4 builder here. ?Instructions call for a plain board power up with no connections beyond power Jack. So I have no plug in cables at all. No ardunio. Nada. zip attached. ?With power 12.5v I get 130ma. ?This is above specs of 80-100ma. Is the extra 30ma due to the extra half volt above 12? Or do I have a problem someplace? ? Thank you all VERY much.
Don Km4udx |
Re: Inexpensive eBay Amplifier Kits
That amp seems to be very similar to this one
but without the first stage and LPF. There is some info on this one, if you search around the web. But some of the info is conflicting.? It puts out about 30-35W but like most of these cheap amps, power falls away from 40M up. glenn vk3pe |
Re: Inexpensive eBay Amplifier Kits
I ordered this PA and a low pass filter board three month ago. The items have not arrived. During several weeks I have now had email discussion throw ebay with this? trader to either send me a replacement or refund me. That has not worked out. The trader did NOT use any registred postal shipment which makes it impossible to trace the shipment. He did not even had my postal address when we discuss a replacement shipment. My advice. Do not buy anything from traders who do not use registred postal service. Do not use traders who has a US-warning on the PayPal service.
This PA will come without any schematics or essembly instruction something that is common for all DIY item from China. Don?t expect hem to send you any info after shipment. Luckely there are a number of instructions on the net which might help you to assembly this type of constructions. Many PA constructions from China seems to suffer from instability. Some of them use re-used outdated final transistors. They are cheap so you get what you pay for. Check on the net for people who has dealt with the DIY item you intend to buy before order.? I have instead bought a ready assembled PA fully linear within .5 dB for 1.0-30 MHz- Input 100 mV and output 30-40 class AB SSB from Russia. Check RV3YF WEB site for more info and order instructions. Fast delivery with schematics. You need to add your own heatzink. He also have some interesting? s-meter and SWR display which I intend to add to the uBITX. Ulf/sm0cgl |
Ludwig,
John VK2ETA just posted a reminder of the diagnostic software he had created to test communication between the Nano and the SI5351 in a different thread. /g/BITX20/message/54073 Very applicable to your situation. Regards, Gary |
Re: uBITX raduino no if output help please
Hello Mike,?
You may also try to see If the Arduino is communicating with the si5351 before changing the nano. In the files section I uploaded some time ago a diagnostic sketch that tests if the i2c bus is locked (short on bus or other device pulling it down), if it can find the si5351 at the expected address and if it can talk to it. It uses the serial monitor so the test can be done with the Raduino unplugged from the board to eliminate as many variables as possible. 73, John (VK2ETA) |