Date   

Re: Si5351 RF signal generator. #SI5351 #RF #Signal Generator #si5351 #rf #signal

 

Ashok,

I just got a postal delivery of some parts ordered a few months ago. This means you can order.

Raj

At 11/05/2020, you wrote:
Thanks to all for your valuable feedback.
I am going with SI5351 for now as I have it with me. I will be careful during measurements. This is only option left now as not possible to acquire AD98XX devices due to lockdown.

Regards
Ashok Das


Re: #raduino #v5 #raduino #v5

Darwin EI3IHB
 

Hi Reed, I saw your message earlier but I’m thinking of making sure I did not fry the display, I’m new to amateur radio , my first HF is ubitx v5 & recently QCX x40m, and again lately learning arduino/IDE/sketch.  I will try to load your software , thank you very much.

73 de EI3IHB  


Re: Si5351 RF signal generator. #SI5351 #RF #Signal Generator #si5351 #rf #signal

ashok.das81@...
 

Thanks to all for your valuable feedback.
I am going with SI5351 for now as I have it with me. I will be careful during measurements. This is only option left now as not possible to acquire AD98XX devices due to lockdown.

Regards
Ashok Das


Re: R1.4.0 Software Release #ubitx #nano #v6 #ubitxv6

Jack, W8TEE
 

I know of a great programming book for you! Full disclosure...I'm biased.

Jack, W8TEE

On Sunday, May 10, 2020, 7:48:00 PM EDT, Tom Crow <n5tti@...> wrote:


Reed,
Thank you for the awesome work!
I'm going to have to learn more of the programming side of the arduino's, rather than scratching thru and making minor tweaks
Thanks again


Tom
N5TTI

--
Jack, W8TEE


Re: Small Vestage of a Pre Dit when Sending Code

edwarduncleshrek@...
 

Thanks! so subjective like the rest of the world.  I will give you a update to see if that worked.  I am still trying to get feed back from a friend on my CW tone quality using his ICOM 7300 we still have not touched base yet.
 
73
 
Ed
 
 

-----Original Message-----
From: Reed N <greenkid336600+groupsio@...>
To: BITX20@groups.io
Sent: Sun, May 10, 2020 8:14 pm
Subject: Re: [BITX20] Small Vestage of a Pre Dit when Sending Code

You can download it from my GitHub: https://github.com/reedbn/ubitxv6. "Installing" is the same process as the Ashhar's official releases, so if you follow Ashhar's tutorial video https://www.youtube.com/watch?v=3n_V3prSJ_E you should be good to go. One note: on the newer Arduino software, you'll want to select the OLD bootloader from the dropdown config.

As far as knowing if you're on the latest and greatest, there's a couple things to consider. If you want to use Ashhar's official releases, you can look at his GitHub (https://github.com/afarhan/ubitxv6/) and periodically check to see if any new commits have been pushed there. Similarly, you can monitor my GitHub. Both of us have made announcements here in this group when new releases are uploaded, so you can watch for that. However, there are bunches of other people who have forked the project, or made additional customizations to the code, or use custom hardware that requires incompatible code (e.g. the KD8CEC supporting Nextion displays, JackAI with Teensy 3.6, or TSW with Teensy 4.0), so the "latest" may always be in flux, and "greatest" will likely be subjective.


Reed


Re: Small Vestage of a Pre Dit when Sending Code

Reed N
 

You can download it from my GitHub: https://github.com/reedbn/ubitxv6. "Installing" is the same process as the Ashhar's official releases, so if you follow Ashhar's tutorial video https://www.youtube.com/watch?v=3n_V3prSJ_E you should be good to go. One note: on the newer Arduino software, you'll want to select the OLD bootloader from the dropdown config.

As far as knowing if you're on the latest and greatest, there's a couple things to consider. If you want to use Ashhar's official releases, you can look at his GitHub (https://github.com/afarhan/ubitxv6/) and periodically check to see if any new commits have been pushed there. Similarly, you can monitor my GitHub. Both of us have made announcements here in this group when new releases are uploaded, so you can watch for that. However, there are bunches of other people who have forked the project, or made additional customizations to the code, or use custom hardware that requires incompatible code (e.g. the KD8CEC supporting Nextion displays, JackAI with Teensy 3.6, or TSW with Teensy 4.0), so the "latest" may always be in flux, and "greatest" will likely be subjective.


Reed


Re: R1.4.0 Software Release #ubitx #nano #v6 #ubitxv6

Tom Crow
 

Reed,
Thank you for the awesome work!
I'm going to have to learn more of the programming side of the arduino's, rather than scratching thru and making minor tweaks
Thanks again


Tom
N5TTI


Do you have a spare stock or stock+meter white amateurradiokits.in faceplate for uBitX enclosure>

Kim Cary <cary00@...>
 

Hello! Do you have one of these faceplates you removed to add the Nextion or SWR display? I ruined ours gluing in the TX/RX diode (Gorrilla glue droo down the front when I turned my back). If you have a spare, let me know. amateurradiokits.in is shut for the pandemic or I'd order there. I know they say shipping next week, but these lockdowns keep getting extended.


Re: Small Vestage of a Pre Dit when Sending Code

edwarduncleshrek@...
 

Thank Reed for your response.  Could you direct me to where I can retrieve R1.5.0 for down load.  One thought id v6.3.1 is the oldest firmware vs v6.1 with all the literature around and posting for the uBitx v6 how can one be sure you are getting the latest and greatest for your v6?
 
Take care
Ed
 
 

-----Original Message-----
From: Reed N <greenkid336600+groupsio@...>
To: BITX20@groups.io
Sent: Sun, May 10, 2020 5:39 pm
Subject: Re: [BITX20] Small Vestage of a Pre Dit when Sending Code

A few notes:
1) v6.3.1 is (uninintuitively) actually the OLDEST software. Ashhar's first release was called that, but his second release was called v6.1.
2) The delay from hearing the relay click to hearing the tone in your headphones could very well be processing time for your SDR and computer, and NOT an indication of an actual issue with the uBiTX
3) There are two pieces to the CW "badness". One is that the diodes aren't perfectly balanced, which means that you get some "leaked" signal in CW (and unsuppressed carrier in SSB) as long as the radio is in transmit mode. The other (that I tried to fix in my software) was that there was a response delay being added into the CW keyer, causing dahs to be dits, and dits to be potentially non-existent on initial startup.

I'd suggest trying out R1.5.0, and see if you still have issues. You can easily switch back to v6.1 if you find you don't like it, or if it doesn't solve your problem.


Reed


Re: Small Vestage of a Pre Dit when Sending Code

Reed N
 

A few notes:

1) v6.3.1 is (uninintuitively) actually the OLDEST software. Ashhar's first release was called that, but his second release was called v6.1.
2) The delay from hearing the relay click to hearing the tone in your headphones could very well be processing time for your SDR and computer, and NOT an indication of an actual issue with the uBiTX
3) There are two pieces to the CW "badness". One is that the diodes aren't perfectly balanced, which means that you get some "leaked" signal in CW (and unsuppressed carrier in SSB) as long as the radio is in transmit mode. The other (that I tried to fix in my software) was that there was a response delay being added into the CW keyer, causing dahs to be dits, and dits to be potentially non-existent on initial startup.

I'd suggest trying out R1.5.0, and see if you still have issues. You can easily switch back to v6.1 if you find you don't like it, or if it doesn't solve your problem.


Reed


Small Vestage of a Pre Dit when Sending Code

edwarduncleshrek@...
 

       
edwarduncleshrek@...Hide
To BITX20@... BITX20@...
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Slideshow
Hello all,
 
Right out of the box I am a newbie to ham radio.  I purchased and built a complete uBitX V6.1 kit radio in February 2020.  I have align the VFO and BFO, adjusted the three variable resistors, and set the finals so I have 3.5 watts out put on 10 meters and 14 watts out put on 7 meters.  Configured the radio for the use with a straight key.  Build a 10 meter inverted V antenna to resonate at 28.400 MHZ with a SWR of 1.03 : 1 and build a 7 meter inverted V antenna to resonate at 7.080 MHZ with a SWR of 1.3 : 1.  The mic that came with the radio was modified to improve voice pick up.
 
My V6.1 testing is done using my computer with a RTL-SDR receiver.  On 10 meters through the inverted V antenna the voice quality is good using the RTL / computer in close proximity to the V6.1.  When sending code on 10 meters with the V6.1 in close proximity to the V6.1 and listening to the RTL / computer and observing the spectrograph I do not get a clean tone at 500 HZ or any other tone setting and WPM setting.  Each code character has a short dit in front of the desired character.  Example a DIT would sound like a dit - DIT  and a DAH would sound like a dit - DAH. I have cleaned the key contacts to see if there is any improvement, there was not.  I also noted that when listening through the head phones, when the key is closed I here the relay engage but there is a delay in hearing the tone. 
 
I was concern that because of the close proximity of the RTL / computer to the V6.1, that the RF from the V6.1 was over whelming the RTL / computer with RF during transmitting.  I did a test on the RTL / computer against another crystal controlled 0.5 watt QRP transceiver in close proximity and noted the audio had a clear tone and spectrograph looked good.  So I moved the RTL / computer .25 miles away from the V6.1 and transmitted voice which was good, and code, which had the same per DIT character before the actual character.  If you were to transmit a string of DAH the audio tone would sound like the hiccups. 
 
In reviewing uBitx on CW #V6 post in the group.oi I found that this problem was discussed with the V6.1. (see list)
 
Date                      Post #                      Author
Jan 12                   74889                      Vic
Jan 26                   75326                      Reed N
Jan 27                   75357                      Reed N
Jan 27                   75361                      Reed N
Jan 27                   75378                      Reed N
Jan 28                   75401                      Andy_501
 
My question if I replace my current firmware with the new firmware V6.3.1 into my radio, will that take care of the 50 m-second delay allowing for proper code tone using a straight key.
 
Thanks Much for any help,
 
 
Ed
 


Re: Si5351 RF signal generator. #SI5351 #RF #Signal Generator #si5351 #rf #signal

GM4CID
 

The AD9833 set to givea a sine wave output might be a better choice but is limited to 12.5MHz.

Bob GM4CID


35/800

Gérard <kabupos@...>
 

Hello,

I’m thinking about M0YYT’s project µbitx: It's a project, i want to build it.

https://ubitx.net/2018/07/02/homebrew-ubitx-with-through-hole-components

I have a couple of questions and comments:
1) Can you give me the value of the Tunning potentiometer in Kohms. How many turns? I can’t find a model with a push button, quite to add one. Have you a part list for it.

2)I saw the need to replace the relays for an Axicom model. No pb for that.

3)I saw that it is also necessary to modify the power supply of the Nextion display (I want put one of 3.2"). Put an inductaance, FT 114-43 with 70 turns. For Arduino power,  modify the  power line and add a resistance of 10 ohm + capacitors.

4) I saw a post that said we can get better performance by replacing transistors on the 45MHZ filter. Which model do you recommend for discrete components. (Transistors with 3 legs

5) Replace Toko transformers with tricoids.  

Others modifications?)

Thank's for your answers


Re: Si5351 RF signal generator. #SI5351 #RF #Signal Generator #si5351 #rf #signal

Arv Evans
 

On most signal generators the sine wave only survives until you connect it 
to something.  Maybe a receiver input would retain the sine wave, but if the 
signal generator is driving a diode that would distort the wave shape.  If the 
impedance is not perfectly matched, that would distort the wave shape.  

The answer really is "maybe" and depends on what you want to use it for.
Knowledge of what you have and what you want to get from it is required 
for signal generators, oscilloscopes, voltmeters, and other test equipment.

Arv  K7HKL
_._



On Sun, May 10, 2020 at 9:48 AM Ashhar Farhan <farhanbox@...> wrote:
Well, if you know to expect it, you can ignore it. No test instrument is perfect and truthful all work with limitations. To circumvent the harmonic problems, I built the Antuino. 
- f

On Sun 10 May, 2020, 8:24 PM Tony W via groups.io, <zeldone=yahoo.co.uk@groups.io> wrote:
I think the results would be too confusing if used as a signal generator. I use one here as an analogue vfo replacement, but I used a low pass filter on the output so I get the same sine wave out of it as I do on the old analogue vfo. I think that is the only way to use it as a sig gen.
Regards
Tony, G4CIZ


Re: #raduino #v5 #raduino #v5

Reed N
 

Hi Darwin,

Not sure if you saw my earlier comment, but I had power sequencing issues occasionally on my v6 that would lead to a blank white screen. I added some code to force wake the screen in my software version, and that seemed to solve the problem for me. You might try R1.5.0.



Reed


Re: Si5351 RF signal generator. #SI5351 #RF #Signal Generator #si5351 #rf #signal

Ashhar Farhan
 

Well, if you know to expect it, you can ignore it. No test instrument is perfect and truthful all work with limitations. To circumvent the harmonic problems, I built the Antuino. 
- f

On Sun 10 May, 2020, 8:24 PM Tony W via groups.io, <zeldone=yahoo.co.uk@groups.io> wrote:
I think the results would be too confusing if used as a signal generator. I use one here as an analogue vfo replacement, but I used a low pass filter on the output so I get the same sine wave out of it as I do on the old analogue vfo. I think that is the only way to use it as a sig gen.
Regards
Tony, G4CIZ


Re: Si5351 RF signal generator. #SI5351 #RF #Signal Generator #si5351 #rf #signal

Tony W
 

I think the results would be too confusing if used as a signal generator. I use one here as an analogue vfo replacement, but I used a low pass filter on the output so I get the same sine wave out of it as I do on the old analogue vfo. I think that is the only way to use it as a sig gen.
Regards
Tony, G4CIZ


Re: Alternate frequency and BFO alignment method #calibration #bfo

Don Alejandro
 

Agreed - not everyone has an SDR, but looking at the transmit signal helped align the uBitx slightly better than the normal method so it seemed worth mentioning the idea.  Of course, this technique could also be used on air, where a second ham looks at their pan adapter and reports on whether the passband is in the right place and if the carrier is on frequency...


Re: #raduino #v5 #raduino #v5

Darwin EI3IHB
 

Hi, luckily the ili9341 is still alive , I used the guide from educ8s.tv  and the arduino graphics test sketch. Thank you . 


Mostly done!!

Chris Cancilla <Chriscancilla@...>
 

Over the past couple weekends I've had the opportunity to start putting it together. I am mostly finished with it I've got maybe another 2 hours before I get the chance to plug it in and turn it on for the first time.

Chris Cancilla, W4CEC

--

__________________________
Chris Cancilla, W4CEC
Raleigh, NC