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uBITX - A reboot of the old BITX

Ashhar Farhan
 

It has been more than a decade since the BITX20 was first built. In these years, we have had many ideas knocking around. After looking hard at these, it became evident to me that a full reboot of the bitx series was needed to incorporate these.

Raduino has been a game changer in many ways. It would have been unimaginable even a few years ago that for a dollar, you would be able to buy a single chip with three clock outputs for less than a dollar.

Anyway, here is the new uBITX (I pronounce it as microBITX). I hope you all find it interesting. Unlike the Minima this is full tested and ready to be built. 

You can read about it on http://phonestack.com/farhan/ubitx/ubitx.html. It hasn't still made it to my home page. If you find any typos or anything that is not clear, push the reply button on this mail thread and I will fix it before it goes out to the world outside the groups.io

There is no kit for it. As usual, the circuit is free for you to build, write about, forward and publish it wherever. However, commercial production of PCBs and kits is prohibited for now. 

Will HFsigs kit it? I am not sure. They are already swamped with a backlog of the bitx40 orders. I will have a conversation with the team and ask them about it.

It goes without saying that without the help of so many of you this rig would never been possible. It is a joint effort of several people who have been helping along with things big and small.  Curiously, this rig derived much of its theory from an older text : Introduction to RF Design by Hayward. Hence, you will see it in the pictures of the rig too. 

- f

Rahul Srivastava
 

Hi!

Off to local electronic spares market...!!!

73

Rahul VU3WJM


On Friday, 3 March 2017 11:28 AM, Ashhar Farhan <farhanbox@...> wrote:


It has been more than a decade since the BITX20 was first built. In these years, we have had many ideas knocking around. After looking hard at these, it became evident to me that a full reboot of the bitx series was needed to incorporate these.

Raduino has been a game changer in many ways. It would have been unimaginable even a few years ago that for a dollar, you would be able to buy a single chip with three clock outputs for less than a dollar.

Anyway, here is the new uBITX (I pronounce it as microBITX). I hope you all find it interesting. Unlike the Minima this is full tested and ready to be built. 

You can read about it on http://phonestack.com/farhan/ubitx/ubitx.html. It hasn't still made it to my home page. If you find any typos or anything that is not clear, push the reply button on this mail thread and I will fix it before it goes out to the world outside the groups.io

There is no kit for it. As usual, the circuit is free for you to build, write about, forward and publish it wherever. However, commercial production of PCBs and kits is prohibited for now. 

Will HFsigs kit it? I am not sure. They are already swamped with a backlog of the bitx40 orders. I will have a conversation with the team and ask them about it.

It goes without saying that without the help of so many of you this rig would never been possible. It is a joint effort of several people who have been helping along with things big and small.  Curiously, this rig derived much of its theory from an older text : Introduction to RF Design by Hayward. Hence, you will see it in the pictures of the rig too. 

- f



DJ2AG
 

Hi,


is it only me getting an error trying to watch the video?


Armin, DJ2AG

Mvs Sarma
 

On Fri, Mar 3, 2017 at 6:29 PM, DJ2AG <ya_duck@...> wrote:

Hi,


is it only me getting an error trying to watch the video?


Armin, DJ2AG




--
Regards
Sarma
 

Craig Wadsworth
 

Ash, You are an amazing and generous fellow. Will we need a 'scope to build your uBITX?

Ashhar Farhan
 

Craig,

the ubitx has no critically tuned filters, etc. if could be built without a scope. I would guess, one module at a time....

- f

On Fri, Mar 3, 2017 at 6:33 PM, Craig Wadsworth <cwadsworth@...> wrote:
Ash, You are an amazing and generous fellow.  Will we need a 'scope to build your uBITX?





W0PWE
 

Beautiful! What an elegant design. Thank you Farhan.

Now I face a difficult decision - modify my existing rig (which is built with TIAs) or start from scratch. Either way I can't wait to get started.


Richard Andrew Knack
 

That's awesome, Ashar! Is there any chance you could post an Eagle PCB file in the not-too-distant future, so that anyone who wants to build one from scratch can make their own PCB?

Rich
KC8MWG


On Friday, March 3, 2017 8:32 AM, W0PWE <j.b.hall@...> wrote:


Beautiful! What an elegant design. Thank you Farhan.
Now I face a difficult decision - modify my existing rig (which is built with TIAs) or start from scratch. Either way I can't wait to get started.



Ray Koster
 

could you tell us what toroids you used in the Ubitx? and what turns you used and gauge of wire


Tnxs Ray koster G7BHQ

Ashhar Farhan
 

Let's wait a while to see a few scratch builds before we commit to a PCB

- f

On 3 Mar 2017 7:08 p.m., "Richard Andrew Knack via Groups.Io" <ihc73scout2=yahoo.com@groups.io> wrote:
That's awesome, Ashar! Is there any chance you could post an Eagle PCB file in the not-too-distant future, so that anyone who wants to build one from scratch can make their own PCB?

Rich
KC8MWG


On Friday, March 3, 2017 8:32 AM, W0PWE <j.b.hall@...> wrote:


Beautiful! What an elegant design. Thank you Farhan.
Now I face a difficult decision - modify my existing rig (which is built with TIAs) or start from scratch. Either way I can't wait to get started.



bill
 

I just downloaded and did a quick review of the ubitx schematic. What an interesting design! Next week I will start putting together my recently arrived bitx40 and I am looking forward to working on it. But to be honest, what I really want now to do is build a ubitx from scratch. As an old engineer (though new ham) I haven't been this charged up about a new project in a long time. Thank you and 73 bill

G1KQH
 

It's on the list of many things yet to be built!

Yes, I would like to see it done as a kit from HF Signals, so count me in if you do one.


Well done Ashhar you do Amateur Radio proud!


73 Steve


G1KQH

Marc Jones
 


It played no problem for me ... I'm looking forward to a schematic and more info ..

Regards

On Fri, 3 Mar 2017 at 12:59, DJ2AG
<ya_duck@...> wrote:

Hi,


is it only me getting an error trying to watch the video?


Armin, DJ2AG

Al Duncan VE3RRD
 

Not sure if it is a character set issue, but my Firefox browser seems to be showing a lot of odd characters on the ubitx.html webpage. Example below:



Ashhar Farhan
 

The schematic is right there on a link below the picture

- f

On Fri, Mar 3, 2017 at 9:17 PM, Marc Jones via Groups.Io <gw0wvl@...> wrote:

It played no problem for me ... I'm looking forward to a schematic and more info ..

Regards

Marc 'Gw0wvl'..

On Fri, 3 Mar 2017 at 12:59, DJ2AG
<ya_duck@...> wrote:

Hi,


is it only me getting an error trying to watch the video?


Armin, DJ2AG

Ashhar Farhan
 

well, it was a character set issue, i was using UTF-8 encoding while pretending it to be plain ASCII text. I have replaced the inverted opening and closing comma with simple comma. hope it renders better now.

- f

On Fri, Mar 3, 2017 at 9:33 PM, Al Duncan VE3RRD <ve3rrd@...> wrote:

Not sure if it is a character set issue, but my Firefox browser seems to be showing a lot of odd characters on the ubitx.html webpage. Example below:



Craig Wadsworth
 

What Bill said. I haven't had this much fun for decades, between Jack Purdum's and Ashar Farhan's designs. On another note, what do y'all think about JYE Tech's DSO138 as a tool for HF stuff? Is it worth trying, and / or should I start shopping for parts for Ashar's Sweeperino and Specan? I've not considered an oscilloscope seriously until after reading some of your posts.

"As an old engineer (though new ham) I haven't been this charged up about a new project in a long time."

Ashhar Farhan
 

The JYO's DSO138 is not at all suited to our purpose. we will need an oscilloscope of at least 20 MHz and preferably 50 MHz bandwidth.

- f

On Fri, Mar 3, 2017 at 10:36 PM, Craig Wadsworth <cwadsworth@...> wrote:
What Bill said.  I haven't had this much fun for decades, between Jack Purdum's and Ashar Farhan's designs.  On another note, what do y'all think about JYE Tech's DSO138 as a tool for HF stuff?  Is it worth trying, and / or should I start shopping for parts for Ashar's Sweeperino and Specan?  I've not considered an oscilloscope seriously until after reading some of your posts.

"As an old engineer (though new ham) I haven't been this charged up about a new project in a long time."




Al Duncan VE3RRD
 

ubitx webpage looks good now on Firefox (and on Chrome), no odd characters.  AL

Marc Jones
 

Bill, I've not seen the schematic, Can't find it ... Do you have a link for it ... Thanks.

Regards

On Fri, 3 Mar 2017 at 14:20, bill
<k7wxw@...> wrote:
I just downloaded and did a quick review of the ubitx schematic. What an interesting design! Next week I will start putting together my recently arrived bitx40 and I am looking forward to working on it. But to be honest, what I really want now to do is build a ubitx from scratch. As an old engineer (though new ham) I haven't been this charged up about a new project in a long time. Thank you and 73 bill

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