Date   
Re: My #ubitx build from scratch #ubitx

Dale Hardin
 

You're the Man!!!  You did a gorgeous job.  Help others follow in your footsteps. Please place layout diagrams in the files for others to use.  Dale

On Wed, Dec 11, 2019 at 1:34 PM <vu3jvx@...> wrote:

I would like to share my journey of building ubitx from scratch, I would also like to dedicate this to Farhan (hope he will read this sometime) as he has always motivated to homebrew stuff.

I got my license 'VU3JVX' on March 2017. Passing the exam and getting on HF bands is still two different things. Yes, I started to transmit to local VHF repeater with cheap Chinese Bafong radio, I believe the most economical way to start the ham operator experience. However, I knew that I am missing something since I was not able to operate on HF bands.Coincidentally I saw that bitx40 became available as kit from HF Signals during the same time. I was happy to try it and that's how I made my first HF rig. Then I came to know about the BITX20 forum and joined the same, one of the best thing I did after buying bitx40. I have learned a lot from all the great people caring and sharing information. I will try to contribute whatever way possible from my side in coming days.

I was already thinking of building bitx40 for other band (because the way Farhan Sir has drawn the schematic it becomes so tempting for DIY) and then ubitx happened and it changed everything. I started studying the ubitx circuit and collecting all the required components, even ordered the exact toroid from W8DIZ website (during my good days and travel to US) but I was not having enough time to put things together on the bench as I am by profession a computer network & security engineer. However, I lost my job this year on month of July. After this I was not sure what to do next, during this time my XYL suggested me that why don't I focus on something which I always wanted to do but never got enough time and that's how my journey started to build the ubitx from scratch.

Honestly, I was not sure if this was the right time to start this project. So I started to work on building the receiver segment of ubitx only. I had my challenges during this time and at one point I thought I made a wrong choice of building ubitx, instead I should had tried the bitx40 circuit first. I was almost on the verge to pack up and shelf the project because I was not able to hear anything from the receiver itself forget about building the transmitter. Then took a break for few days and then started troubleshooting each segment one by one. Finally I found it after reading through the bitx20 forum that my Q70 to be defective then I also came to know that is it better to replace it with audio type transistor 2sc945.

I believe during this process I have read most of the content on bitx20 forum. Some name which repeatedly comes to my mind are Raj (vu2zap), Allison, Jerry and thanks to all other hams out there. I had all the version schematics but started my work based on V5 and wanted to get the best out of all the version so I kept the build approach modular and laying them almost like the schematic for easy troubleshooting (you can see those pic on my qrz page).

Next challenge was trying to be too good student and follow everything the master said (pun intended). I made a cocktail of 12 Mhz with 11.059 Mhz crystal filter (Farhan Sir I believe the schematic is still showing X7 as 12 Mhz) and after changing the X7 to 11.059 Mhz I was able to see the radio signal making it through the crystal filter, then came the next hurdle of fine tuning the USB and LSB and fiddling with the software for the right value. After the receiver started working I took a break from building the radio and started enjoying the receiver and checking all bands. One evening I narrowly missed Farhan ji on air but anyway I would not have been able to communicate with him since my ubitx transmitter was not ready.

After that day I thought of building the ubitx transmitter soon. I was quiet confident about the transmitter build by this time and thought it should be straight forward. Logically yes it should had been that way but I was so wrong. Following all the recommendation from the forum about harmonic issue and how to avoid them I started building the BPF. Then I started to work on the PA section then came tuning the IRF510 current (I call it "Bell the cat moment") luckily I never blew any IRF510. However, the output watt on 40 M was hardly 2-3 Watts and other higher band less than 1 Watt. I knew something was wrong with those MOSFET but out of circuit the test look normal. I had some other stock from different source even those performed the same. Played around with different PA transformer settings and checking/tracing the RF signal. Everything looked normal till IRF510. Chances of fake IRF510 is less (as debated on the forum) as it is not an expensive RF part like RD16HHF1. Now I was confused, I had some spare new RD16HHF1 which I got online, which I was not very hopeful thinking that it might be fake. I thought of giving it a try (pin layout configuration was easy for me as I have taken the island cutting approach on single side copper board).

Voila ! I got a whopping 10+ Watt 40M, 5W on 20, 10W on 17M, 10W on 15M, 5W on 12M and 10M. Yes there are lot of fake IRF510 out there. Now it was time to test the homebrew rig on air, checked in at evening into All India Net and got 59 report and the net controller thought I am using commercial rig. Finally during these difficult time in my personal life I was able to smile and sleep well that day. The icing on the cake was installing the Nextion 3.5 display (If I remember correctly this is single most expensive component in the radio and thankfully it is optional).

Does that mean everything is 100% with my home brew ubitx ? Nope, I am still trying to figure out the feedback issue from the speaker during transmit. I traced the issue and found the audio leaking from emitter of Q6. I would like to mention that I tried all the audio circuit and finally settle for TDA2822 circuit. However, the issue is still there during transit so I have made the audio circuit offline during transmit, I know this will impact my CW listening while transmitting when I upgrade my license . I have exhausted all solutions from Bitx20 forum but still no luck. I would be happy is someone can point me to the right direction. I would be also happy to share any information related to my build or the software settings/tuning, yes I like programming especially 'C' so I am comfortable with Arduino programs. I am thinking of building another PA module with IRF510, I personally feel IRF510 (I got the original finally) has made the home brewing so interesting. 




--
Dale Hardin
Elberta, AL 

--
Dale Hardin, KS4NS
Elberta, AL

Re: Done!

Jack, W8TEE
 

We are sending signals to a stepper motor controller, which then controls an NEMA 17 stepper motor at the antenna. Depending upon what you are using, I don't see why it can't be made to work.

Jack, W8TEE

On Wednesday, December 11, 2019, 4:07:47 PM EST, David Adams <david@...> wrote:


Cool!  And for those that already own a loop (alex, alpha or whatever... I haven't actually owned a loop since the AES Isoloop which I still miss), is it an easy retrofit?

Dave

--
Jack, W8TEE

Re: Done!

David Adams
 

Cool!  And for those that already own a loop (alex, alpha or whatever... I haven't actually owned a loop since the AES Isoloop which I still miss), is it an easy retrofit?

Dave

Re: Done!

Jack, W8TEE
 

Thanks...it's appreciated!

Jack, W8TEE

On Wednesday, December 11, 2019, 3:55:13 PM EST, Laurence Oberman <oberman.l@...> wrote:


Read the first one cover-to-cover
Cant wait to get the next one.
Congratulations to both of you

On Wed, Dec 11, 2019 at 3:46 PM Jack, W8TEE via Groups.Io
<jjpurdum=yahoo.com@groups.io> wrote:
>
> Actually, that's an interesting question. Al and I have talked about releasing the BOM's for the projects, but we need to find out if we can legally do that. More after I find out. There will be PCB's for all of the projects, except the really simple ones (e.g., the Mini DL).
>
> Jack, W8TEE
>
> On Wednesday, December 11, 2019, 3:25:01 PM EST, Mike WA0YCN <mgassman@...> wrote:
>
>
> And we have to wait months to get what we need to build this cool project?  :)
>
> --
> Jack, W8TEE
>



--
Jack, W8TEE

Re: Done!

Laurence Oberman
 

Read the first one cover-to-cover
Cant wait to get the next one.
Congratulations to both of you

On Wed, Dec 11, 2019 at 3:46 PM Jack, W8TEE via Groups.Io
<jjpurdum=yahoo.com@groups.io> wrote:

Actually, that's an interesting question. Al and I have talked about releasing the BOM's for the projects, but we need to find out if we can legally do that. More after I find out. There will be PCB's for all of the projects, except the really simple ones (e.g., the Mini DL).

Jack, W8TEE

On Wednesday, December 11, 2019, 3:25:01 PM EST, Mike WA0YCN <mgassman@...> wrote:


And we have to wait months to get what we need to build this cool project? :)

--
Jack, W8TEE

Re: Done!

Jack, W8TEE
 

Actually, that's an interesting question. Al and I have talked about releasing the BOM's for the projects, but we need to find out if we can legally do that. More after I find out. There will be PCB's for all of the projects, except the really simple ones (e.g., the Mini DL).

Jack, W8TEE

On Wednesday, December 11, 2019, 3:25:01 PM EST, Mike WA0YCN <mgassman@...> wrote:


And we have to wait months to get what we need to build this cool project?  :)

--
Jack, W8TEE

Re: Installing BCI and Kit-Projects AGC

 

No problem David, thank you and Tim for the excellent customer service and great products.

Joel
N6ALT

Re: Done!

Mike WA0YCN
 

And we have to wait months to get what we need to build this cool project?  :)

My #ubitx build from scratch #ubitx

Anthony Gomes
 

I would like to share my journey of building ubitx from scratch, I would also like to dedicate this to Farhan (hope he will read this sometime) as he has always motivated to homebrew stuff.

I got my license 'VU3JVX' on March 2017. Passing the exam and getting on HF bands is still two different things. Yes, I started to transmit to local VHF repeater with cheap Chinese Bafong radio, I believe the most economical way to start the ham operator experience. However, I knew that I am missing something since I was not able to operate on HF bands.Coincidentally I saw that bitx40 became available as kit from HF Signals during the same time. I was happy to try it and that's how I made my first HF rig. Then I came to know about the BITX20 forum and joined the same, one of the best thing I did after buying bitx40. I have learned a lot from all the great people caring and sharing information. I will try to contribute whatever way possible from my side in coming days.

I was already thinking of building bitx40 for other band (because the way Farhan Sir has drawn the schematic it becomes so tempting for DIY) and then ubitx happened and it changed everything. I started studying the ubitx circuit and collecting all the required components, even ordered the exact toroid from W8DIZ website (during my good days and travel to US) but I was not having enough time to put things together on the bench as I am by profession a computer network & security engineer. However, I lost my job this year on month of July. After this I was not sure what to do next, during this time my XYL suggested me that why don't I focus on something which I always wanted to do but never got enough time and that's how my journey started to build the ubitx from scratch.

Honestly, I was not sure if this was the right time to start this project. So I started to work on building the receiver segment of ubitx only. I had my challenges during this time and at one point I thought I made a wrong choice of building ubitx, instead I should had tried the bitx40 circuit first. I was almost on the verge to pack up and shelf the project because I was not able to hear anything from the receiver itself forget about building the transmitter. Then took a break for few days and then started troubleshooting each segment one by one. Finally I found it after reading through the bitx20 forum that my Q70 to be defective then I also came to know that is it better to replace it with audio type transistor 2sc945.

I believe during this process I have read most of the content on bitx20 forum. Some name which repeatedly comes to my mind are Raj (vu2zap), Allison, Jerry and thanks to all other hams out there. I had all the version schematics but started my work based on V5 and wanted to get the best out of all the version so I kept the build approach modular and laying them almost like the schematic for easy troubleshooting (you can see those pic on my qrz page).

Next challenge was trying to be too good student and follow everything the master said (pun intended). I made a cocktail of 12 Mhz with 11.059 Mhz crystal filter (Farhan Sir I believe the schematic is still showing X7 as 12 Mhz) and after changing the X7 to 11.059 Mhz I was able to see the radio signal making it through the crystal filter, then came the next hurdle of fine tuning the USB and LSB and fiddling with the software for the right value. After the receiver started working I took a break from building the radio and started enjoying the receiver and checking all bands. One evening I narrowly missed Farhan ji on air but anyway I would not have been able to communicate with him since my ubitx transmitter was not ready.

After that day I thought of building the ubitx transmitter soon. I was quiet confident about the transmitter build by this time and thought it should be straight forward. Logically yes it should had been that way but I was so wrong. Following all the recommendation from the forum about harmonic issue and how to avoid them I started building the BPF. Then I started to work on the PA section then came tuning the IRF510 current (I call it "Bell the cat moment") luckily I never blew any IRF510. However, the output watt on 40 M was hardly 2-3 Watts and other higher band less than 1 Watt. I knew something was wrong with those MOSFET but out of circuit the test look normal. I had some other stock from different source even those performed the same. Played around with different PA transformer settings and checking/tracing the RF signal. Everything looked normal till IRF510. Chances of fake IRF510 is less (as debated on the forum) as it is not an expensive RF part like RD16HHF1. Now I was confused, I had some spare new RD16HHF1 which I got online, which I was not very hopeful thinking that it might be fake. I thought of giving it a try (pin layout configuration was easy for me as I have taken the island cutting approach on single side copper board).

Voila ! I got a whopping 10+ Watt 40M, 5W on 20, 10W on 17M, 10W on 15M, 5W on 12M and 10M. Yes there are lot of fake IRF510 out there. Now it was time to test the homebrew rig on air, checked in at evening into All India Net and got 59 report and the net controller thought I am using commercial rig. Finally during these difficult time in my personal life I was able to smile and sleep well that day. The icing on the cake was installing the Nextion 3.5 display (If I remember correctly this is single most expensive component in the radio and thankfully it is optional).

Does that mean everything is 100% with my home brew ubitx ? Nope, I am still trying to figure out the feedback issue from the speaker during transmit. I traced the issue and found the audio leaking from emitter of Q6. I would like to mention that I tried all the audio circuit and finally settle for TDA2822 circuit. However, the issue is still there during transit so I have made the audio circuit offline during transmit, I know this will impact my CW listening while transmitting when I upgrade my license . I have exhausted all solutions from Bitx20 forum but still no luck. I would be happy is someone can point me to the right direction. I would be also happy to share any information related to my build or the software settings/tuning, yes I like programming especially 'C' so I am comfortable with Arduino programs. I am thinking of building another PA module with IRF510, I personally feel IRF510 (I got the original finally) has made the home brewing so interesting. 


uBITx for sale

Marty
 

I have the following for sale. I had bought the kit hoping to put together and find I don't have the time to finish and looking for a house and other obligations at the same time.
I have the following;

- uBitX kit with v5 board
  http://www.hfsignals.com/index.php/ubitx/

- 5" Nextion Display flashed and working with the Raduino

- Universal Case Black For uBitx Nextion Display Fitting 5 Inch
  https://amateurradiokits.in/product/universal-case-green-black-for-ubitx-nextion-display-fitting-5-inch/

I had hooked up the encoder and is correctly working with the Raduino
everything originally sent
with the case, Nexton Display and uBitx kit will be included!

Everything will be nicely packed for shipping!

With in the Continental USA shipping $350 and accept PayPal.

73,
Marty KD4HLV

 

Re: Done!

Jack, W8TEE
 

Our HamRadioDesigns site is hacked every time we fix it and our ISP has been zero help. As a result, we are using our SoftwareControlledHamRadio group for most things now.

Jack, W8TEE

On Wednesday, December 11, 2019, 11:29:25 AM EST, dwhacks <waterlowphotography@...> wrote:


This is going to be awesome! One thing, I was looking for the Dummy Load code again last night and I was getting all sort of errors on your site. Any idea why that's happening?

--
Jack, W8TEE

Re: Done!

Jack, W8TEE
 

The Mag loop covers 40, 30, and 20M with an SWR of 1.2:1 or better on all bands. It's about 3' in diameter, which is why I call it "luggable". We tested it at Field day and worked CO to the East coast running 100W. We've also made over 10,000 WSPR entries all over the world, too. Chapter 14 is dedicated to building the loops and 15 covers the remote control unit. Unlike many remote tuners that rely on audio noise levels to tune the antenna, ours gives you an SWR plot on the display. It has a Fast Tune mode where it uses previous cap settings stored in EEPROM to quickly move the cap to the proper setting. The more you use it, the quicker it gets at tuning. We've tested it to 100' separation with perfect results. It's pretty cool!

Jack, W8TEE

On Wednesday, December 11, 2019, 12:07:22 PM EST, David Adams <david@...> wrote:


Tell me more about this mag loop controller... also congratulations on the new book.  I look forward to purchasing it!


dAve

On 12/11/2019 11:03 AM, Jack, W8TEE via Groups.Io wrote:
All:

I've been rattling on about the "new Projects" book off-and-on for about a year. Al (AC8GY) and I are sending the book to the publisher (ARRL) on Friday, completely finished and ready to go! The projects in the book can be seen in this photo:

Inline image


There are four other chapters, too, but don't result in an actual project (e.g., setting up the IDE, Intro to C, Libraries and OOP, etc.). Alas, the ARRL has stuck the new license manual in front of our book, so it appears we will miss the Dayton show. That really sucks since Al and I will be at FDIM anyway. Oh well...


Jack, W8TEE

--
Jack, W8TEE

--
Jack, W8TEE

First WSPR 80 meter results on ugly build uBITx v5 #digital #images #ubitx #v5

Erwin - PE3ES - F4VTQ
 



Connected to a Raspberry Pi4 running WebWSPR by DJ0ABR. The sound out is hard to control, I do need to put some attenuation in.
--
PE3ES - F4VTQ - Erwin
73

Re: Done!

David Adams
 

Tell me more about this mag loop controller... also congratulations on the new book.  I look forward to purchasing it!


dAve

On 12/11/2019 11:03 AM, Jack, W8TEE via Groups.Io wrote:
All:

I've been rattling on about the "new Projects" book off-and-on for about a year. Al (AC8GY) and I are sending the book to the publisher (ARRL) on Friday, completely finished and ready to go! The projects in the book can be seen in this photo:




There are four other chapters, too, but don't result in an actual project (e.g., setting up the IDE, Intro to C, Libraries and OOP, etc.). Alas, the ARRL has stuck the new license manual in front of our book, so it appears we will miss the Dayton show. That really sucks since Al and I will be at FDIM anyway. Oh well...


Jack, W8TEE

--
Jack, W8TEE

Re: Active antenna into uBITx V5 gives some smoke on the coax #ubitx #v5 #antennas

Skip Davis
 

Yes that 100nf capacitor will work fine. 

Skip Davis, NC9O

On Dec 11, 2019, at 11:52, Erwin Serlé via Groups.Io <waterwin2@...> wrote:

Thank you Skip, I will add a DC-blocking capacitor. Would 100nF be good?


--
PE3ES - F4VTQ - Erwin
73

Re: enhancement #ubitx #v5

Erwin - PE3ES - F4VTQ
 

1. Decide what you need most, find the articles and authors associated with these, etc.

2. Use google, find Alex Buurlage PA1FOX and mail him.
He might even answer when asked friendly.

3. Offer support for the group to make a nice index to everything and the rest.


--
PE3ES - F4VTQ - Erwin
73

Re: Installing BCI and Kit-Projects AGC

 

Joel,

 I am build more today and hope to have yours in the mail today or tomorrow. Sorry for the delay.

73
--
David

 N8DAH
Kit-Projects.com

Shop is open!

Re: STM32F769-FT8-Transceiver

Charles Hill
 

Erwin,

Thanks for the interest.

It will not be feasible to port the application to other boards than the F769.

Regards,

charley

Re: Active antenna into uBITx V5 gives some smoke on the coax #ubitx #v5 #antennas

Erwin - PE3ES - F4VTQ
 

Thank you Skip, I will add a DC-blocking capacitor. Would 100nF be good?


--
PE3ES - F4VTQ - Erwin
73

Re: Done!

dwhacks
 

This is going to be awesome! One thing, I was looking for the Dummy Load code again last night and I was getting all sort of errors on your site. Any idea why that's happening?