Re: uBITX - A reboot of the old BITX
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
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
Hi,
is it only me getting an error trying to watch the video?
Armin, DJ2AG
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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
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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There 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 ? ?
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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: BITX 40 (Pre-Raduino) Sanity Check Please
Thanks...got it now!
Jack,W8TEE
From: AndyH <Sent: Thursday, March 2, 2017 5:15 PM
Subject: Re: [BITX20] BITX 40 (Pre-Raduino) Sanity Check Please
Sorry Jack - I thought I attached the code to my last message. ?I've uploaded it.
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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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The 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 ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Michael Davis
Sent: Thursday, March 02, 2017 5:06 PM
To: [email protected]
Subject: [BITX20] Raduino temp ? ?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
In 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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Thanks Gene,
?Please
allow me a copy .
In the
absence of GPS , perhaps Arduino can internally manage? 1pps
employing accurate? 1sec pulse-"roman balck's code".
?
?Thanks
and regards
?sarma
?vu3zmv
Gene
I would
like a copy also. You could post it on the web site
also.?
Art
N2AJO
Sent from my iPhone
On Mar 2, 2017, at 9:17 AM, Tore Bonderudt?jet via
Groups.Io < lb4rg@...>
wrote:
Bob
I would be interested ?
in the?Raduino. code mod
Art
lb4rg
On Saturday, February 18,
2017 11:32 PM, gene marcus <gmarcus@...>
wrote:
Hello
Bob,
I
authored the article that you
are referring to. The article
is located
at: < >.
??I
recently
modified the code to run on
the Raduino. ?GPS
frequency correction?is
optional. If anyone is
interested in receiving a copy
of the Raduino?version just
send me an email.
Gene
W3PM GM4YRE
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I did put a heatsink on, I didn't know if I needed a heatsink.
When in doubt just add it, can't hurt.
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I replaced the display with a non backlit display. ?I added a piece of metal to the tab of the regulator. It can withstand the temps but the metal added some mass as a heatsink
73? Larry KB3CUF
Sent from my Galaxy Tab? E
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-------- Original message -------- From: Michael Davis <maddmd818@...> Date: 3/2/2017 18:05 (GMT-05:00) Subject: [BITX20] Raduino temp
?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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?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: New video from Aahhar - Micro BITX
Unless I miss my guess, I would say that this is the latest incarnation
of the Minima. A general transceiver with the mixer replaced by a
multi-diode unit, the VFO a variation on the Si5351 DDS, and a somewhat
simpler circuit than the BITX40, but multiband. It will be interesting to know
what the IF is...
In other words, a new HF-1 transceiver.
john
AD5YE
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Re: BITX 40 (Pre-Raduino) Sanity Check Please
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Re: BITX 40 (Pre-Raduino) Sanity Check Please
Go into the calibration mode and adjust it so it reads true .
On Thu, 2 Mar 2017 at 19:59, AndyH <ahecker@...> wrote: I've confirmed today that while my VFO appears to be doing what it's supposed to be doing (generating a square wave that properly shifts frequency between 5.0 and 4.7 MHz), that the frequency display on the LCD is 1500 Hz low. ?To transmit and receive on 7280 I have to tune to 7281500. As I've not yet seen this reported here or in the portion of the interwebz accessible via Google searches, and I've not seen any allowance for such an adjustment in the various bits of Arduino code floating about, I'd like to ask if anyone else has experienced this or knows of a similar challenge. Thanks in advance, Andy
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Craig Wadsworth
Allard PE1NWL
Marc Jones