Date   
Raduino 4 Line Single Sided PCB boards

Rahul Srivastava
 

Hi! Friends,

I have designed a homebrew friendly Single sided PCB for Raduino in a form factor of 20X4 line LCD. This board  supports 2 line display as well. I have added some minor edits to orignal Raduino schematics that is self explanatory namely few more electrolytics, separate Analog Digital ground plain, Nano module on component side to make it plugable. Largely thru hole components but SMD pads also included for coupling and decoupling caps.

All fabrication files are being made Open Source for personal and club use only. Please verify the Gerbers before making the board. Your feedback is highly appreciated for any further improvements.

Enjoy & 73

Rahul VU3WJM

Re: Mx-50pm #ubitx-help #bitx20 #ubitx

Mike aka KC2WVB <rb5363@...>
 

I can't see why not. However perhaps a better choice is, from memory, the HF Packer. I had one but sold it when I moved. I am wishing I had not. Please Google the amp. I am sure you will be pleased by its attributes.


On Sat, May 26, 2018, 11:07 PM حمد المزين <hamad.kalid@...> wrote:
Hello everyone i want to amplify the output and i want to use the amplifier that will give me between 30-40w as output i found tge Mx-50pm which has good price and good reviews but people use this amplifier to yaesu 817 and for the KX3 so can i use and in addition my output is 5 watt approximately in 20m and 40m and 80m and the 10m it was 2 watt 

Re: The new uBITX boards are here

 

Did not see the updated circuit Farhan, the old one shows up!

Raj


At 27/05/2018, you wrote:
Peeps,Â

All in all, the changes are 'backward compatible' . That is, you can hack these changes to the previous boards to get in the new functionality. I have updated the circuit diargrams on www.hfsignals.com. The earlier board's circuit diagram has moved to http://www.hfsignals.com/index.php/ubitx-r3-archived/

Re: The new uBITX boards are here

 

See here Clark!

http://www.hfsignals.com/index.php/ubitx-circuit-description/ I see the new one. If you see the old one then
try CTRL-F5 to completely refresh.

Raj


At 27/05/2018, you wrote:
I looked on www.hfsignals.com, specifically at http://www.hfsignals.com/index.php/ubitx-circuit-description/ and the schematic it shows it still v3, http://www.hfsignals.com/wp-content/uploads/2017/12/ubitxv3.pdf.

Clark Martin
KK6ISP

Re: The new uBITX boards are here

Skip Davis
 

Rah, the new schematic shows up in the ‘Circuit Description’ tab but the link from the schematic brings up the Raduino circuit. That link needs to be fix to see a larger printable version. 
Thanks Farhan for updating the board and information. 

Skip Davis, NC9O

On May 27, 2018, at 00:28, Raj vu2zap <rajendrakumargg@...> wrote:

Did not see the updated circuit Farhan, the old one shows up!

Raj

At 27/05/2018, you wrote:
Peeps,Â

All in all, the changes are 'backward compatible' . That is, you can hack these changes to the previous boards to get in the new functionality. I have updated the circuit diargrams on www.hfsignals.com. The earlier board's circuit diagram has moved to http://www.hfsignals.com/index.php/ubitx-r3-archived/

Re: The new uBITX boards are here

Clark Martin
 

I see the old one still.  CTRL-F5 doesn’t refresh on my Mac but I did refresh and also tried it on another browser that I’ve never used to go to HFSignals, still the old v3 schematic.


Clark Martin
KK6ISP

On May 26, 2018, at 9:38 PM, Raj vu2zap <rajendrakumargg@...> wrote:

See here Clark!

http://www.hfsignals.com/index.php/ubitx-circuit-description/ I see the new one. If you see the old one then
try CTRL-F5 to completely refresh.

Raj

At 27/05/2018, you wrote:
I looked on www.hfsignals.com, specifically at http://www.hfsignals.com/index.php/ubitx-circuit-description/ and the schematic it shows it still v3, http://www.hfsignals.com/wp-content/uploads/2017/12/ubitxv3.pdf.

Re: The new uBITX boards are here

Jerry Gaffke
 

Maybe you have it cached somehow?
I'm seeing the new circuit here:  http://www.hfsignals.com/index.php/ubitx-circuit-description/


On Sat, May 26, 2018 at 09:29 pm, Raj vu2zap wrote:
Did not see the updated circuit Farhan, the old one shows up!

Raj

Re: The new uBITX boards are here

Mike Woods
 

This is because your ISP is saving money.  Frequently accessed links may be cached by your browser, your router/firewall, by a proxy server, or by your ISP depending on how things are configured.   Give it a day or so and the page should have been refreshed.

Mike ZL1AXG

On 27/05/18 4:51 PM, Jerry Gaffke via Groups.Io wrote:
Maybe you have it cached somehow?
I'm seeing the new circuit here:  http://www.hfsignals.com/index.php/ubitx-circuit-description/


On Sat, May 26, 2018 at 09:29 pm, Raj vu2zap wrote:
Did not see the updated circuit Farhan, the old one shows up!

Raj


--
Mike Woods
mhwoods@...

Re: The new uBITX boards are here

Clark Martin
 

The Circuit description is updated but the schematic is the old one.


Clark Martin
KK6ISP

On May 26, 2018, at 9:51 PM, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:

Maybe you have it cached somehow?
I'm seeing the new circuit here:  http://www.hfsignals.com/index.php/ubitx-circuit-description/


On Sat, May 26, 2018 at 09:29 pm, Raj vu2zap wrote:
Did not see the updated circuit Farhan, the old one shows up!



Re: The new uBITX boards are here

Vince Vielhaber
 

Jerry, click the link for the schematic at the top. It still shows v3.

Vince.

On 05/27/2018 12:51 AM, Jerry Gaffke via Groups.Io wrote:
Maybe you have it cached somehow?
I'm seeing the new circuit
here: http://www.hfsignals.com/index.php/ubitx-circuit-description/


On Sat, May 26, 2018 at 09:29 pm, Raj vu2zap wrote:

Did not see the updated circuit Farhan, the old one shows up!

Raj

Re: The new uBITX boards are here

Ashhar Farhan
 

My bad, the new link didn't get udpated. Curse the WP! I have updated it again now.

- f

On Sun, May 27, 2018 at 10:33 AM, Vince Vielhaber <vev@...> wrote:
Jerry, click the link for the schematic at the top.  It still shows v3.

Vince.


On 05/27/2018 12:51 AM, Jerry Gaffke via Groups.Io wrote:
Maybe you have it cached somehow?
I'm seeing the new circuit
here:  http://www.hfsignals.com/index.php/ubitx-circuit-description/


On Sat, May 26, 2018 at 09:29 pm, Raj vu2zap wrote:

    Did not see the updated circuit Farhan, the old one shows up!

    Raj



--
  Michigan VHF Corp.   http://www.nobucks.net/   http://www.CDupe.com/
                          http://www.metalworkingfun.com




Re: The new uBITX boards are here

Jerry Gaffke
 

OK, changes I see are:

Everything after the audio pre-amp from the M2 relay connection on,
now with a 2n7000 at Q74 for the ptt pop and 2n3904's at Q71,72,73 to replace the TDA2822.

Cap C81 at the Q90 emitter is now 470pf instead of 0.1uF to reduce gain on the low bands
in that first stage of the transmit amp chain.

RD15/RD16's can be stuffed as an alternative to the IRF510's without having to cross the source and drain pins.

Is that it?

Jerry 


On Sat, May 26, 2018 at 10:24 pm, Ashhar Farhan wrote:
My bad, the new link didn't get udpated. Curse the WP! I have updated it again now.
 

Re: The new uBITX boards are here

Ashhar Farhan
 

jerry,

yep, that's it. There are very subtle changes to the PCB layout. I have brought the audio connector in-line with the raduino connector. This will help us in the future while using a DSP enabled controller board like the JackAl.

- f

On Sun, May 27, 2018 at 11:16 AM, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:
OK, changes I see are:

Everything after the audio pre-amp from the M2 relay connection on,
now with a 2n7000 at Q74 for the ptt pop and 2n3904's at Q71,72,73 to replace the TDA2822.

Cap C81 at the Q90 emitter is now 470pf instead of 0.1uF to reduce gain on the low bands
in that first stage of the transmit amp chain.

RD15/RD16's can be stuffed as an alternative to the IRF510's without having to cross the source and drain pins.

Is that it?

Jerry 


On Sat, May 26, 2018 at 10:24 pm, Ashhar Farhan wrote:
My bad, the new link didn't get udpated. Curse the WP! I have updated it again now.
 


Re: The new uBITX boards are here

 

Farhan,

That link for PDF seems split into two where the left most is the new version and right most is old one!


µBITX Circuit D iagram (PDF)  | Raduino Circuit | µBITX ‘s Arduino software
^^^^^                ^^^^


At 27/05/2018, you wrote:
My bad, the new link didn't get udpated. Curse the WP! I have updated it again now.

- f

Re: The new uBITX boards are here

Ashhar Farhan
 

i have fixed it. i had to edit the html. my career as an html coderr is pitiful.
- f

On Sun, May 27, 2018 at 11:34 AM, Raj vu2zap <rajendrakumargg@...> wrote:
Farhan,

That link for PDF seems split into two where the left most is the new version and right most is old one!


µBITX Circuit D iagram (PDF)  | Raduino Circuit | µBITX ‘s Arduino software
^^^^^                ^^^^

At 27/05/2018, you wrote:
My bad, the new link didn't get udpated. Curse the WP! I have updated it again now.

- f


Re: KD8CEC uBITX firmware 1.071 #ubitx

Tom, wb6b
 

Hi,

I upgraded to the 1.8 firmware and it seems to work fine. Although I had done my calibration when I had the 1.075 version installed.

Tom, wb6b

Re: The new uBITX boards are here

ohwenzelph
 

Ron, C81 was changed to 470pf” and R83 changed from 10 to 2.2 ohms.

Re: uBitX CEC LSB / USB reversal #firmware #ubitx

Tom, wb6b
 

Doing the calibration on WWB can be a bit of a challenge. First time I tried, the signal was weak and various birdies caused the real zero beat to be masked. With a strong signal that problem went away.

However, there is a subcarrier on WWV that makes it difficult to zero beat. I found during the voice announcements the sound of the voice worked well for making the adjustment. After the tones start again, you get a feel for what the signal sounds like when zero beat is obtained, and you don't need to wait for the top of the minute, for voice, after that.

One of the issues is knowing what some ballpark starting values are for the "Master Calibration" and the "USB calibration". So, here are mine after I did a calibration and set the VFO to sound good to my ear.

Reading the calibration settings from the uBITX back into the CEC uBITX Manager the "Master Calibration" ended up at 157,500 and the "USB Calibration" ended up at 11,995,655.

The master calibration number, in the CEC uBITX Manager, is the calibration number you zero beat on times 8,750. So, the Master Calibration can vary from zero to large values. In my case I zero beat at 18, so 18 x 8,750 = 157,500.

Finally, I found you need to turn the power off to the uBITX and back on after each attempt to calibrate. (If connected, be sure to disconnect the USB cable, too, to remove that source of power to the processor.) Otherwise, the calibration spirals out farther away from center each time you repeat the calibration step. 

Tom, wb6b

Re: The new uBITX boards are here

Philip
 

Also C261, and C262. Have been removed from the PA FETs

Philip G7JUR

Re: 2 meter bitx possible?

MVS Sarma
 

On Sat, May 26, 2018 at 10:44 PM, Ashhar Farhan <farhanbox@...> wrote:
It is BFG591 transistor.
Check out hmc482 and bga612 mmics.
= f

On Sat, 26 May 2018, 19:52 David Arthur, <mumrah@...> wrote:
I'm also really curious about an inexpensive VHF/UHF MMIC. Searching around "BGA" takes me to NXP which has a wide selection of parts, but no hits for BGA591

-David

On Fri, May 25, 2018 at 3:34 PM Jerry Gaffke via Groups.Io <jgaffke=yahoo.com@groups.io> wrote:
No hits for BGA591, can you give a link?

In some other forum, I recall a conversation between Ashhar and Allison regarding low noise mmic's for a VHF receiver front end.
Can't find it anymore.  Allison had a favorite, quite cheap, extremely low noise figure.
What was that part?

Jerry

On Fri, May 25, 2018 at 11:36 am, Ashhar Farhan wrote:
As an architecture, the ubitx is quite suitable upto 432 MHz. The changes needed would be as follows:
 
1. The front-end mixer would have to be an ADE-1 or and SBL-1. The current tranformers and BAT54s would cut it.
2. We will need a good band pass filter. Above 146 Mhz, stripline/coax filters are more likely candidates.
3. The LNA and power chain will need MMICs. they are cheap and easily ordered from mouser.com. A pair of BGA591 can easily provide the obligatory 5 watts.
 
- f

--
David K4DBZ
Unofficial bitx chatroom: https://discord.gg/CrHvWFc