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Re: uBITX - A reboot of the old BITX
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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Re: uBITX - A reboot of the old BITX
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=[email protected]> wrote:
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Re: uBITX - A reboot of the old BITX
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. |
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Re: uBITX - A reboot of the old BITX
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? |
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Re: uBITX - A reboot of the old BITX
please try here ? On Fri, Mar 3, 2017 at 6:29 PM, DJ2AG <ya_duck@...> wrote:
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Regards
Sarma ? |
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Re: Installing the Arduino IDE directions.
Many thanks for these directions!
I want to start experimenting a bit with the Raduino code, and this document is very helpful to get started. But before playing around in the software I would like to make a backup of the code that is currently loaded in the Raduino, for just in case. Is there a way to download the code from the Raduino and save it as a backup? 73, Allard PE1NWL |
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Re: uBITX - A reboot of the old BITX
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 . 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 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 |
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uBITX - A reboot of the old BITX
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 . 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 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 |
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Re: New file uploaded to [email protected]
¿ªÔÆÌåÓýThere seems to be a couple of errors in the description section of the sketch. Under ¡°Stand alone modifications¡± 1.????? The step frequency resolution pot wiper should go to A6 vice A7 2.????? Step? 2 connect the 1 PPS to pin 6 vice pin 8 Gene, am I missing something? ? v/r Fred W4JLE ? ? From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Notification ? Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the [email protected] group. File: BITX_Radruino_GPS_VFO.ino Uploaded By: gene marcus Description: You can access this file at the URL: Cheers, |
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Re: BITX 40 (Pre-Raduino) Sanity Check Please
Jack, I'm embarrassed. I started from the version of the code you pulled, changed the 12000000 Hz BFO reference to my actual measured value (11.998488 MHz) in line 38 (volatile uint32_t bfo = 1199848800ULL; //start in LSB correction. Actual BFO freq as measured: 11998488 Hz.) and the output freq and dial display freq are back in sync. ?Additionally, the VFO frequency range is still proper - 4.7-5.0 for 7.3 - 7.0 MHz. ?Output power is good and the signal that escapes is an intelligible SSB transmission. All I can say at this point is that I have no idea what I broke during the previous six rounds of testing. ?I also can't explain how changing the BFO entry in the code didn't appear to change the output frequency range of the Si5351. /g/BITX20/files/KG5RKP%20BITX40 Thanks very much for your time. ?Sorry. Andy |
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Re: Raduino temp
Ed Vignati
You can also, like I did is remove resistor 111, add 2 wires to go to a 1K potentiometer. Either lead going to the pot, install a 100 ohm? resistor, so you don't over drive the LCD backlight. ? Works great for adjusting to different background (inside the house, outside at the beach, ect.) ?lighting Eddie - kj4fgi |
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Re: Raduino temp
¿ªÔÆÌåÓýThe backlight can be dimmed by putting a resistor in series with the LED anode pin on the display (pin 15 on most displays).? Since the current draw varies widely with the color of the backlight LEDs you will have to experiment.? If you can, measure the current into pin 15 and then calculate a resistance that will reduce the current by 75% or so and see if the brightness is about what you want.? Then go from there. Mike N. K5ESS ? From: [email protected] [mailto:[email protected]] On Behalf Of Michael Davis ? ?Has anyone addressed the raduino power transistor heat issue? Maybe it can withstand a significant rise in temperature without using a heat sink. Much has been discussed around the PA temperature and larger heat sink if operating it at 20 volts, bu I haven't noticed any discussion on the raduino. Also, can the very bright display backlight be dimmed a bit? Thanks |
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Re: GPS corrected Arduino controlled VFO
Graham
¿ªÔÆÌåÓýIn lieu of a 1pps from a GPS you could use anything which generates 1pps. Anything from a Rubidium 10MHz standard to a highly stable 1 or 5 or 10 mhz OCXO or even your AC power 50 or 60 hertz divided down appropriately to generate a 1 pps.examples of very simple PIC devices programmed to do the dividing. ?I have done just this drive one of Hans' PROGROCKs with a 1pps from a 10MHz OCXO rather than a Gps - works very well. cheers, Graham ve3gtc On 2017-03-02 15:17, Mvs Sarma via
Groups.Io wrote:
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bill
Craig Wadsworth
Allard PE1NWL