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Hi, Art,

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

On Mon, Jul 9, 2018 at 09:29 AM, Howard Fidel wrote:

I would be in favor of adding a frequency on 20 Meters

Then 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.

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.
Call and listen for CQ BITX on the hour and every quarter hour.
It is helpful if you call CQ BITX with your callsign, name and location.?
Repeat your callsign a number of times during your CQ BITX and during QSO's.
Start a QSO by confirming the callsign, location, name and signal report of the other operator.
Say the callsign, name and location of the other operator so others can hear.
If the frequency is busy, avoid long conversations.
After your initial QSO is complete, ask if there are any other stations who would like to contact.

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!
--
John - WA2FZW

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 All,

Is it possible to obtain a replacement Raduino board for the BitK40 kit.

Mine has suffered from too much “experimentation”

73
John
M0JBA

Hi Ion,

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

开云体育

I’ve built two of the Hardrock 50’s. They are great amps and pretty bullet proof. I’ve used them on several trips outside

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.
--
David

?N8DAH

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.

开云体育

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!

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

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

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

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)