Date   
Re: TIA amps modification

George
 

Dear Sarma

Merry Christmas to you.
Reg. R10 you are right, but my idea was to make minimum changes to the original schematic, BF998 I goes from 2.5mA(0V Gate-2) to 16mA(5.5V G-2).
Summering all:
1. I picked up 12 all crystals from the board and modeled the filter on small one, result-very very close to original. I made Chebushev 1 dB 8 crystal filter 
and got 2.7 kHz wide near 2 shape factor 6/60dB;
2. Changed 45 MHz fitler to 4-pole DSF 753SDF  type D450 15GQ 15 kHz/3 dB very good one;
3. Befor the last TIA amp I put another 12 MHz filer(original).
4. Changed the output transformer to BN-43-202 x2 one and one wire in chain and 3 wires out in parallel to rise the power on high bands.
Best regards George UR4CRG/RX3ARG

Re: Fw: [JackAl] uBitx v6 compatibility?

David Wilcox
 

Jack, 

What is JumboMail?

Dave K8WPE

David J. Wilcox K8WPE’s iPad

On Dec 25, 2019, at 9:26 AM, Jack, W8TEE via Groups.Io <jjpurdum@...> wrote:


Sorry...didn't mean to take bandwidth for this.

Jack, W8TEE

On Wednesday, December 25, 2019, 10:17:11 AM EST, Jack, W8TEE via Groups.Io <jjpurdum@...> wrote:


Dave:

I've used JumboMail to send you the documentation for the JackAl and, as you will read, there are some parts you still need to buy (e.g., the display). The hardest part is making the two cables to replace the uBITX cables. It's not hard, just takes a little time. If you still want to build a JackAl and report about it to us, send me a mailing address and I'll send you a JackAl board. The understanding for this is that you will write to us to tell how it works for you. We'd also appreciate it if you didn't sell the board to anyone. In the meantime, you could order your parts.


Jack

On Wednesday, December 18, 2019, 1:17:45 PM EST, Dave New <n8sbe@...> wrote:


Jack,

I have a V6 w/cabinet on order.  Supposedly it will be here the first couple of weeks in January.

I've never tried your JackAl before, so if you want a neophyte to give a review from that viewpoint, I could be your guy.

73,

-- Dave, N8SBE
-------- Original Message --------
Subject: [BITX20] Fw: [JackAl] uBitx v6 compatibility?
From: "Jack, W8TEE via Groups.Io" <jjpurdum@...>
Date: Tue, December 17, 2019 4:28 pm
To: BITX20 <bitx20@groups.io>

George:

We don't have a V6 yet, but since we replace the entire radino board anyway, I would think it should.  Let's put it this way, I will give someone a JackAl board if they agree to test it on a V6 board and write up a timely short report on it for distribution here. If you want to test it, please tell me the kind of building/test equipment you have. (Al and I are starting the PCB's for the projects in the book and it's going to keep us busy for a while.)

Jack, W8TEE

On Tuesday, December 17, 2019, 4:17:30 PM EST, n2apb <n2apb@...> wrote:


Is JackAl compatible with the new v6 uBitx board?

73, George N2APB

--
Jack, W8TEE

--
Jack, W8TEE

--
Jack, W8TEE

Re: ubitx is on preorder now

Gordon Gibby
 

Congratulations on moving through your first production run of printed circuit boards!
Hope everyone recovers nicely and that your operation is back to humming in a few weeks.
73,
Gordon Gibby KX4Z


On Thu, Dec 26, 2019 at 1:24 AM Ashhar Farhan <farhanbox@...> wrote:
People,

We are taking a break over the season and the new year. The elverines have taken a break and the dwarfs have passed out. Any future orders will be shipped from January 20th onwards. We have also run out of the PCBs, and the new ones will arrive only  by the 4th or 5th of January.

Have a great new years and hope the sunspots return soon!!

73, f

ubitx is on preorder now

Ashhar Farhan
 

People,

We are taking a break over the season and the new year. The elverines have taken a break and the dwarfs have passed out. Any future orders will be shipped from January 20th onwards. We have also run out of the PCBs, and the new ones will arrive only  by the 4th or 5th of January.

Have a great new years and hope the sunspots return soon!!

73, f

Re: Wanted: uBitX V5 Board Set

Lou KI5FTY
 

Yes - $100?


On Wed, Dec 25, 2019 at 12:43 PM CopyguyAZ <copyguyaz@...> wrote:
Looking to purchase a v5 board set. I bought the universal case and by the time I got the order in for the boards they has switched to the v6.

Let me know if you have one you want to part with. 

17M band bug in the firmware

Ashhar Farhan
 

Peeps,
There is a bug in the ubitx_ui.cpp in line 246. It should read "17", instead it reads "18" in the code as shipped. This makes the button for 17 meters (18 Mhz) unusable, you have to use fast tune or direct frequency entry to get to 18 MHz. I have patched the source code on https://github.com/afarhan/ubitxv6
Remember, that the v6 source code compiles only when saved inside the sketches folder of the Arduino. This is an Arduino idiosyncracies.
- f 

Version 6 Received, and working. Comments, questions, and a couple of bugs

Neil Goldstein
 

My 6 arrived yesterday here in Upstate NY. A great Christmas/Hanukkah present!

I have it up and running.  No QSOs yet, but some observations and questions:

1: When you go into the setup menu, your current Freq and USB settings do not appear, but it resets everything as soon as you try to enter the field. This freaked me out at first because the defaults are way off, and it left me with an unusable radio.  I was able to figure out how to get it back though.  WWV is your friend!  It would be great if the current values displayed first though.
2: 17M preset not working. All other bands work fine. 
3: Entering a frequency lower that 1000 kHz displays wrong. Example: entering 950 kHz displays as 9500, but is actually tuning 950. Turning the knob leaves you in the same band-range, but still displays as freq X 10 until you pass 1000 kHz, then it displays as 1000 kHz.
4: Screw on feet would be better. Adhesive not so great.
5: How do I display firmware version?  Not a huge issue right now, but going forward it might be helpful
6: Why so many extra screws?

That's all for now.  More as I play with it.  I have it hooked up to the Alex Loop here in the dining room, and will need to take it down for Dinner.  I'm home from work until Monday so I have time to play.

--Neil, W2NDG . radiokitguide.com

Simple uBitX V3 Audio Amp Fix

Jim WB2LHP in MI
 

For those of you running a V3 board with the TDA2822M audio chip, here is a simple fix that should prevent the IC from being destroyed.

Insert a 15 ohm, 1/2 watt resistor in between the 470uf output cap and the (+) speaker lead. This limits the maximum DC output current of the IC. Without it, the speaker looks like a dead DC short and will stress the chip on power up and during operation. There is still more than sufficient audio power for the speaker. I am using this on my V3 with no issues. It's easy to try and doesn't involve hacking the board.

I also limit the power supply to 12 volts DC maximum. Using a common 12 volt, 3 amp switching power supply does a nice job at keeping the maximum voltage and current at bay.

Happy Holidays. Jim WB2LHP

Wanted: uBitX V5 Board Set

Brad, K7NNR
 

Looking to purchase a v5 board set. I bought the universal case and by the time I got the order in for the boards they has switched to the v6.

Let me know if you have one you want to part with. 

Re: TIA amps modification

MVS Sarma
 

George,
Merry Christmas to youband all.
Reg TIA mod, the resiator R10 value can be increased to 100k or atleast 47k, i suppose.
Regards
Sarma vu3zmv

On Wed, 25 Dec 2019, 11:54 am George via Groups.Io, <rx3arg=mail.ru@groups.io> wrote:
My schema

Re: Help with a v5 stuck in transmit.

KG5MG
 

I installed the 470 ohm resistor but I'll go back and check the solder joints.

I used the 4 pin Mic connection that came with the custom metal enclosure and an old PTT Mic from a HT I rewired.  Also, the stuck in TX state continued after powering off the radio, removing the Mic completely and turning the radio back on.
  





Hamp Yearwood
KG5MG 

-------- Original message --------
From: "Edward Reynolds via Groups.Io" <n7snt@...>
Date: 12/25/19 7:24 AM (GMT-06:00)
To: BITX20@groups.io
Subject: Re: [BITX20] Help with a v5 stuck in transmit.

Definitely check that resistor for correct installation, if wrong it will key the radio

Ed de N7SNT 



On Dec 24, 2019, at 1:59 PM, Curt via Groups.Io <wb8yyy@...> wrote:

Hamp

See if the 470 ohm resistor used for TR switching is installed, then check the solder joint at each end.

Smaller possibility is RF getting into raduino. Likely it's something simple.

Curt

Re: India to Texas in 3 days

Michael
 

I'd place the blame for that squarely on the head of DHL. It was some guy in a yellow truck that dropped mine off on Christmas Eve, not Ashhar Farhan.

Re: Fw: [JackAl] uBitx v6 compatibility?

Jack, W8TEE
 

Sorry...didn't mean to take bandwidth for this.

Jack, W8TEE

On Wednesday, December 25, 2019, 10:17:11 AM EST, Jack, W8TEE via Groups.Io <jjpurdum@...> wrote:


Dave:

I've used JumboMail to send you the documentation for the JackAl and, as you will read, there are some parts you still need to buy (e.g., the display). The hardest part is making the two cables to replace the uBITX cables. It's not hard, just takes a little time. If you still want to build a JackAl and report about it to us, send me a mailing address and I'll send you a JackAl board. The understanding for this is that you will write to us to tell how it works for you. We'd also appreciate it if you didn't sell the board to anyone. In the meantime, you could order your parts.


Jack

On Wednesday, December 18, 2019, 1:17:45 PM EST, Dave New <n8sbe@...> wrote:


Jack,

I have a V6 w/cabinet on order.  Supposedly it will be here the first couple of weeks in January.

I've never tried your JackAl before, so if you want a neophyte to give a review from that viewpoint, I could be your guy.

73,

-- Dave, N8SBE
-------- Original Message --------
Subject: [BITX20] Fw: [JackAl] uBitx v6 compatibility?
From: "Jack, W8TEE via Groups.Io" <jjpurdum@...>
Date: Tue, December 17, 2019 4:28 pm
To: BITX20 <bitx20@groups.io>

George:

We don't have a V6 yet, but since we replace the entire radino board anyway, I would think it should.  Let's put it this way, I will give someone a JackAl board if they agree to test it on a V6 board and write up a timely short report on it for distribution here. If you want to test it, please tell me the kind of building/test equipment you have. (Al and I are starting the PCB's for the projects in the book and it's going to keep us busy for a while.)

Jack, W8TEE

On Tuesday, December 17, 2019, 4:17:30 PM EST, n2apb <n2apb@...> wrote:


Is JackAl compatible with the new v6 uBitx board?

73, George N2APB

--
Jack, W8TEE

--
Jack, W8TEE

--
Jack, W8TEE

Re: Fw: [JackAl] uBitx v6 compatibility?

Jack, W8TEE
 

Dave:

I've used JumboMail to send you the documentation for the JackAl and, as you will read, there are some parts you still need to buy (e.g., the display). The hardest part is making the two cables to replace the uBITX cables. It's not hard, just takes a little time. If you still want to build a JackAl and report about it to us, send me a mailing address and I'll send you a JackAl board. The understanding for this is that you will write to us to tell how it works for you. We'd also appreciate it if you didn't sell the board to anyone. In the meantime, you could order your parts.


Jack

On Wednesday, December 18, 2019, 1:17:45 PM EST, Dave New <n8sbe@...> wrote:


Jack,

I have a V6 w/cabinet on order.  Supposedly it will be here the first couple of weeks in January.

I've never tried your JackAl before, so if you want a neophyte to give a review from that viewpoint, I could be your guy.

73,

-- Dave, N8SBE
-------- Original Message --------
Subject: [BITX20] Fw: [JackAl] uBitx v6 compatibility?
From: "Jack, W8TEE via Groups.Io" <jjpurdum@...>
Date: Tue, December 17, 2019 4:28 pm
To: BITX20 <bitx20@groups.io>

George:

We don't have a V6 yet, but since we replace the entire radino board anyway, I would think it should.  Let's put it this way, I will give someone a JackAl board if they agree to test it on a V6 board and write up a timely short report on it for distribution here. If you want to test it, please tell me the kind of building/test equipment you have. (Al and I are starting the PCB's for the projects in the book and it's going to keep us busy for a while.)

Jack, W8TEE

On Tuesday, December 17, 2019, 4:17:30 PM EST, n2apb <n2apb@...> wrote:


Is JackAl compatible with the new v6 uBitx board?

73, George N2APB

--
Jack, W8TEE

--
Jack, W8TEE

Re: Help with a v5 stuck in transmit.

Erwin Serlé
 

Without the PTT switch installed in the orange cable, putting a mic into the jack switches on Tx permanently, or the mic should have its own PTT switch like in the assembly instructions for the included electret mic.
--
PE3ES - F4VTQ - Erwin
73

Re: India to Texas in 3 days

Mick
 

Ordered mine on Dec 21, but I haven’t received a confirmation yet I hope that is just the Christmas rush.

Sent from Mick's iPad
73
VA3EPM

On Dec 24, 2019, at 10:26 PM, Ashhar Farhan <farhanbox@...> wrote:


I wish we could ship all of them for Christmas. We got the prototype PCBs made in China. Then, the Indian Customs played truant and sat on them for 10 days! 
Happy christmas folks and have a great new year too! Be safe and be QRP. 

73, f.

On Wed 25 Dec, 2019, 8:07 AM Steve Sawicki via Groups.Io, <ab2et=yahoo.com@groups.io> wrote:
All,
This afternoon (3:30 PM) the DHL truck arrived in front of my home in the Villages, The door bell chimed and I received the V6 full Kit.
The package went next to my small Christmas tree and I will patiently wait until Christmas Morning to open the "Christmas Gift" and spend the afternoon to build it.
AF should be proud of his team and their abilities, great communications and delivery , 
Merry Christmas and a Happy Healthy New Year to All.
Best Regards.
73' s
Steve
AB2ET/4

Re: Help with a v5 stuck in transmit.

Edward Reynolds
 

Definitely check that resistor for correct installation, if wrong it will key the radio

Ed de N7SNT 



On Dec 24, 2019, at 1:59 PM, Curt via Groups.Io <wb8yyy@...> wrote:

Hamp

See if the 470 ohm resistor used for TR switching is installed, then check the solder joint at each end.

Smaller possibility is RF getting into raduino. Likely it's something simple.

Curt

Re: Audio Buzzing

Anthony Gomes
 

Dean (N7XG),

So you are able to find the root cause. I had the same issue with my 3.5 Nextion display, after making it 100% it went off. Yes it's gets worst if I try to reduce the brightness. However, I was sure this was discuss on this forum previously. I found the post https://groups.io/g/BITX20/topic/67125540#73406

Good read about Nextion display @ https://ubitx.net/category/nextion-display/

73 and Merry Christmas !!!
Anthony
VU3JVX

Re: TIA amps modification

George
 

My schema

Re: India to Texas in 3 days

Ashhar Farhan
 

I wish we could ship all of them for Christmas. We got the prototype PCBs made in China. Then, the Indian Customs played truant and sat on them for 10 days! 
Happy christmas folks and have a great new year too! Be safe and be QRP. 

73, f.

On Wed 25 Dec, 2019, 8:07 AM Steve Sawicki via Groups.Io, <ab2et=yahoo.com@groups.io> wrote:
All,
This afternoon (3:30 PM) the DHL truck arrived in front of my home in the Villages, The door bell chimed and I received the V6 full Kit.
The package went next to my small Christmas tree and I will patiently wait until Christmas Morning to open the "Christmas Gift" and spend the afternoon to build it.
AF should be proud of his team and their abilities, great communications and delivery , 
Merry Christmas and a Happy Healthy New Year to All.
Best Regards.
73' s
Steve
AB2ET/4