Re: Rugged Case Options?
#ubitx
Wow beautiful box really nice work. Where did u find the box? Box size etc if you don’t mind
Bob
W5RKM
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The schematic shows the yellow wire going to the wiper arm, but in the instructions
later on the orange wire goes to the wiper. Which is correct?
Ed
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Loved looking at your old gear on QRZ. I saw the Galaxy V; just sold my old GT-550:
Big mistake...
Jack, W8TEE
From: Dave Bottom <ars.kd6az@...>
To: [email protected]
Sent: Sunday, December 31, 2017 6:58 PM
Subject: Re: [BITX20] elves are at it
QRZ has changed their link policy so you’ll have to type in my call sign for now.
Dave WI6R Happy New Year to all.
Received mine on the 24th (lucky I ordered on the 10th).
Got my case yesterday late afternoon and finished the case prep before turning in.
Wired up this morning. It’s alive!!! First contact 600 Miles - 59 report.
See top of my QRZ page for pictures.
Off to build a Mic pre-amp with Mic Gain control. Then work on paddle interface.
Dave WI6R Sent from my iPhone Same here 12/23 date. Pretty excited!? Thank you, Farhan!
Tom
AB7WT
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Re: Tell me your favorite uBitx mods
My current tuner PCB that I use on the 50W amplifier is 2" wide and 4.5" long, 2 sided, 7-inductor, 8-capacitor, including the arduino (leonardo) control circuity (caveat: I have a few components on the backside of the PCB... I aim for single side component on this).? But it should all fit.? The SWR Bridge is on a separate PCB, but consumes all of maybe 1" x 1" with the two FT43-37's, a few diodes, etc.
6" x 5.5" is a heck of a lot of real estate.? When doing AGC, I will have to see what I can do to get an analog signal back to the arduino to create an S-meter reading.?
CAT interface is easy, I'm pulling the USB connector to the edge.? That's a matter of programming, and to my knowledge, is the main limiting factor for most people wanting to do CAT control.? Unsure by soundcard interface, other than adding isolation transformers?? Can you not hook up the audio lines/etc to a computer right now as it is?
Fitting it all isn't an issue.? Fitting it all in cleanly and making good use of the front and back panel space is the hard part, and that's what I haven't decided on yet, is how to do the BNC/etc connectors so that it could easily fit into a case with no protrusions, since some things just take up a lot of real estate (display, the connectors down to the uBitx, the heatsinks for the PA, etc)
On Sun, Dec 31, 2017 at 7:33 PM, Gordon Gibby <ggibby@...> wrote:
Hmmm....fairly ambitious goals, my friend!? ?
If you can put a TUNER in that space, you're a wizard.? ?
For my preferences, any simple vox-type soundcard interface would be nice.? ? ?Maybe a mic preamp also / mic gain control of some sort.??
And an AGC circuit...
Having some sort of a power-meter, SWR bridge would eliminate my need to add another one outside (I like watching that)
I think it would be very nice to have an input that could auto-detect if it is 12V or 19-28V and automatically provide 12V for the main board and the higher voltage to the finals.? ?
I don't know how hard it would be to put a thermo-sensor on the FETs, but that would be a nice addition.? ?
I'm thinking yet another board (larger) somewhere would be needed for a real tuner able to handle a wide range of impedances....
Of course, these are all "luxury items"
my 2 cents worth!!? ?
My concept is to create a 6" x 5.5" PCB.? It would go on top of .5" standoffs on top of the uBitx main PCB.? One would remove the raduino, save the display, discard the nano/raduino (or better, use for a different project), and use the board
as I'm creating it instead.? The idea is to create a clean, 2-PCB design, with a tuner, USB connectivity, built in connectors, etc.? It would replace some of the parts that come with the uBitx normally, make the case more compact, and remove the requirements
to wire everything into an enclosure, allowing a clean 3D printed setup or however one would like.
-- Martin Held - AE7EU
-------------------------------------------------------------------------------
If there aren't any questions, then what is there to learn?
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Re: Rugged Case Options?
#ubitx
Neat work, nice drilling!
Raj
At 01-01-2018, you wrote:
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Finished up my case today.?
Drilled holes and mounted speaker and 3D printed a volume knob.? I
may print a larger one for the VFO as well.?
![[]](/g/BITX20/attachment/37981/)
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?
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Re: Tell me your favorite uBitx mods
Sound card interface for digital modes, CAT interface.
On 12/31/2017 6:29 PM, Diver Martin
wrote:
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Show quoted text
Hello all,
As I'm doing a motherboard mod, I'm looking to incorporate
a bunch of mods into one PCB.? Right now, what I've got going
are the following:
* A tuner + SWR Bridge (phase detector maybe?)
* A spot for an RTL-SDR (blogV3) dongle
* AGC Modifications
* Integrating LCD and headphone/mic/BNC/Power/etc jacks
into the PCB
Other things I've thought about, space depending:
*Adding in footprints for a chinese AD9850 DDS module for
one of the clock signals
I would like to hear the top mods you've done, and what
you'd love to see integrated into a motherboard PCB that fits
on top of the uBitx.? Battery charger?? Battery adapter? I
dunno, bring it on!? If you have a favorite AGC mod, please
tell me about it, and make some suggestions as well.? This is
not promising to be a cheap kit, and full of SMT, but
something I might make available.
Happy new year,
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Re: Tell me your favorite uBitx mods
Hmmm....fairly ambitious goals, my friend!? ?
If you can put a TUNER in that space, you're a wizard.? ?
For my preferences, any simple vox-type soundcard interface would be nice.? ? ?Maybe a mic preamp also / mic gain control of some sort.??
And an AGC circuit...
Having some sort of a power-meter, SWR bridge would eliminate my need to add another one outside (I like watching that)
I think it would be very nice to have an input that could auto-detect if it is 12V or 19-28V and automatically provide 12V for the main board and the higher voltage to the finals.? ?
I don't know how hard it would be to put a thermo-sensor on the FETs, but that would be a nice addition.? ?
I'm thinking yet another board (larger) somewhere would be needed for a real tuner able to handle a wide range of impedances....
Of course, these are all "luxury items"
my 2 cents worth!!? ?
toggle quoted message
Show quoted text
My concept is to create a 6" x 5.5" PCB.? It would go on top of .5" standoffs on top of the uBitx main PCB.? One would remove the raduino, save the display, discard the nano/raduino (or better, use for a different project), and use the board
as I'm creating it instead.? The idea is to create a clean, 2-PCB design, with a tuner, USB connectivity, built in connectors, etc.? It would replace some of the parts that come with the uBitx normally, make the case more compact, and remove the requirements
to wire everything into an enclosure, allowing a clean 3D printed setup or however one would like.
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Re: Rugged Case Options?
#ubitx
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Re: ubitx circuit, wiring, source code on github
?Jerry---wow, thanks!? ?very concise explanation.? Yes, since I had PLENTY of signal I was able to get it right near to zero beat with the ICOM 718 on 10 Mhz upper or lower.? ?There were tiny differences in the ICom whether? upper sideband
or lower so I just roughly split the diffference.
For my particular purposes, if I'm within 50 Hz it is fabulous, if within 100 OK and if within200 Hz workable.? ?
But I was sweating bullets at first when I realized I had knocked it a kilter.? ?
I may disable some of those or provide confirmation steps in a sketch to avoid the debacle I got myself into.....
Gordon
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Gordon,
The factory calibration on the uBitx is probably fine.
It adjusts the 875mhz vco by 875hz each step, so 1ppm.
A wee bit coarse when operating at 30mhz,? but most of us won't really notice.
Your 10mhz factory calibration was scooting over by 10hz for each tick of the encoder.
if (knob > 0)
calibration += 875;
else if (knob < 0)
calibration -= 875;
else
continue; //don't update the frequency or the display
The code under? ?menuSetupCalibration()? ?for us mere mortals has this:
while (digitalRead(PTT) == HIGH && !btnDown())
{
knob = enc_read();
if (knob > 0){
calibration += 8750;
usbCarrier += 120;
}
else if (knob < 0){
calibration -= 8750;
usbCarrier -= 120;
}
So the 12mhz BFO is getting adjusted by 120 hz each step, and the 875mhz vco by 8750 hz each step.??
That's 10ppm, and for a 30mhz operating frequency that means you can only set the rig to the nearest 300 hz.
Not a big deal, just leave it calibrated as shipped.
Or use the factory calibration procedure.
Or calibrate it as you (Gordon) have on the Bitx40 by jamming a correct value for the 25mhz reference oscillator into the sketch.
But I think the "on the air" calibration scheme in the code as shipped is going to be too coarse for most of us.
Easy enough to fix with a new sketch.
Jerry, KE7ER
On Sun, Dec 31, 2017 at 05:55 pm, Gordon Gibby wrote:
Not sure what rig that applies to, when I did the factory calibration at 10 MHz, it moved pretty smoothly.
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Re: Tell me your favorite uBitx mods
My concept is to create a 6" x 5.5" PCB.? It would go on top of .5" standoffs on top of the uBitx main PCB.? One would remove the raduino, save the display, discard the nano/raduino (or better, use for a different project), and use the board as I'm creating it instead.? The idea is to create a clean, 2-PCB design, with a tuner, USB connectivity, built in connectors, etc.? It would replace some of the parts that come with the uBitx normally, make the case more compact, and remove the requirements to wire everything into an enclosure, allowing a clean 3D printed setup or however one would like.
On Sun, Dec 31, 2017 at 7:00 PM, Jerry Gaffke via Groups.Io <jgaffke@...> wrote: What do you mean by motherboard?
Are you replacing the uBitx main board, for which the Raduino could be called a daughterboard?
Or perhaps you mean the Raduino board, for which the Nano could be called a daughterboard?
On Sun, Dec 31, 2017 at 06:29 pm, Diver Martin wrote:
As I'm doing a motherboard mod, I'm looking to incorporate a bunch of mods into one PCB.
-- Martin Held - AE7EU
-------------------------------------------------------------------------------
If there aren't any questions, then what is there to learn?
|
Re: Tell me your favorite uBitx mods
What do you mean by motherboard?
Are you replacing the uBitx main board, for which the Raduino could be called a daughterboard?
Or perhaps you mean the Raduino board, for which the Nano could be called a daughterboard?
toggle quoted message
Show quoted text
On Sun, Dec 31, 2017 at 06:29 pm, Diver Martin wrote:
As I'm doing a motherboard mod, I'm looking to incorporate a bunch of mods into one PCB.
|
Re: ubitx circuit, wiring, source code on github
Gordon, The factory calibration on the uBitx is probably fine. It adjusts the 875mhz vco by 875hz each step, so 1ppm. A wee bit coarse when operating at 30mhz,? but most of us won't really notice. Your 10mhz factory calibration was scooting over by 10hz for each tick of the encoder.
if (knob > 0)
calibration += 875;
else if (knob < 0)
calibration -= 875;
else
continue; //don't update the frequency or the display
The code under? ?menuSetupCalibration()? ?for us mere mortals has this:
while (digitalRead(PTT) == HIGH && !btnDown())
{
knob = enc_read();
if (knob > 0){
calibration += 8750;
usbCarrier += 120;
}
else if (knob < 0){
calibration -= 8750;
usbCarrier -= 120;
}
So the 12mhz BFO is getting adjusted by 120 hz each step, and the 875mhz vco by 8750 hz each step.?? That's 10ppm, and for a 30mhz operating frequency that means you can only set the rig to the nearest 300 hz. Not a big deal, just leave it calibrated as shipped. Or use the factory calibration procedure. Or calibrate it as you (Gordon) have on the Bitx40 by jamming a correct value for the 25mhz reference oscillator into the sketch. But I think the "on the air" calibration scheme in the code as shipped is going to be too coarse for most of us. Easy enough to fix with a new sketch. Jerry, KE7ER
On Sun, Dec 31, 2017 at 05:55 pm, Gordon Gibby wrote:
Not sure what rig that applies to, when I did the factory calibration at 10 MHz, it moved pretty smoothly.
|
Tell me your favorite uBitx mods
Hello all,
As I'm doing a motherboard mod, I'm looking to incorporate a bunch of mods into one PCB.? Right now, what I've got going are the following:
* A tuner + SWR Bridge (phase detector maybe?) * A spot for an RTL-SDR (blogV3) dongle * AGC Modifications * Integrating LCD and headphone/mic/BNC/Power/etc jacks into the PCB
Other things I've thought about, space depending:
*Adding in footprints for a chinese AD9850 DDS module for one of the clock signals
I would like to hear the top mods you've done, and what you'd love to see integrated into a motherboard PCB that fits on top of the uBitx.? Battery charger?? Battery adapter? I dunno, bring it on!? If you have a favorite AGC mod, please tell me about it, and make some suggestions as well.? This is not promising to be a cheap kit, and full of SMT, but something I might make available.
Happy new year,
-- Martin Held - AE7EU
-------------------------------------------------------------------------------
If there aren't any questions, then what is there to learn?
|
|
|
Re: ubitx circuit, wiring, source code on github
Then I just commanded it to 25 MHz for the sketch, measured the output frequency to the accuracy of my ICOM 718, then corrected the 25000000 base crystal ?number in the sketch.
I forget exactly now, but I think it was 3.82 kilohertz high. ? all the units I've measured have come between about 3 1/2 and 4 1/2 kHz high
I've checked that 718 against 10 MHz WWV, and I don't really have anything in my house any more accurate than it. ?
Sent from my iPhone
On Dec 31, 2017, at 20:55, Gordon Gibby < ggibby@...> wrote:
toggle quoted message
Show quoted text
Not sure what rig that applies to, when I did the factory calibration at 10 MHz, it moved pretty smoothly.
Sent from my iPhone
On Dec 31, 2017, at 20:52, Jerry Gaffke via Groups.Io < jgaffke@...> wrote:
From post 35235:? "The displayed frequency should be exactly ? sig = clk2-(clk1-clk0)"
Looks like the github code causes the calibration to jump in steps of 10ppm,
which means clk0,1,2 all jump by 10ppm as well, and from the equation above the?
operating frequency "sig" will jump by 10ppm with each calibration step.
When operating at 30mhz the calibration steps are 300hz, which is quite coarse.
I think.
On Sun, Dec 31, 2017 at 12:56 pm, Jerry Gaffke wrote:
One possible issue with the current calibration scheme is that it apparently moves vcoa by leaps of 8750hz, or 10ppm.
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Re: ubitx circuit, wiring, source code on github
Not sure what rig that applies to, when I did the factory calibration at 10 MHz, it moved pretty smoothly.
Sent from my iPhone
On Dec 31, 2017, at 20:52, Jerry Gaffke via Groups.Io < jgaffke@...> wrote:
toggle quoted message
Show quoted text
From post 35235:? "The displayed frequency should be exactly ? sig = clk2-(clk1-clk0)"
Looks like the github code causes the calibration to jump in steps of 10ppm,
which means clk0,1,2 all jump by 10ppm as well, and from the equation above the?
operating frequency "sig" will jump by 10ppm with each calibration step.
When operating at 30mhz the calibration steps are 300hz, which is quite coarse.
I think.
On Sun, Dec 31, 2017 at 12:56 pm, Jerry Gaffke wrote:
One possible issue with the current calibration scheme is that it apparently moves vcoa by leaps of 8750hz, or 10ppm.
|
Re: ubitx circuit, wiring, source code on github
From post 35235:? "The displayed frequency should be exactly ? sig = clk2-(clk1-clk0)"
Looks like the github code causes the calibration to jump in steps of 10ppm,
which means clk0,1,2 all jump by 10ppm as well, and from the equation above the?
operating frequency "sig" will jump by 10ppm with each calibration step.
When operating at 30mhz the calibration steps are 300hz, which is quite coarse.
I think.
toggle quoted message
Show quoted text
On Sun, Dec 31, 2017 at 12:56 pm, Jerry Gaffke wrote:
One possible issue with the current calibration scheme is that it apparently moves vcoa by leaps of 8750hz, or 10ppm.
|
Glenn,
Nice PCB layouts!? Digging your projects as pictured on QRZ...? Do you have schematics/etc posted anywhere?? Love seeing other's homebrew stuff.
For now linear SWR-only tuning works, but eventually I should get to phase/magnitude detection.? What's interesting to me when I went and looked at the KX3 is that it doesn't actually have a phase detector that I can tell.??
Bill, now you've gotten me interested in Sabin's book, as if I didn't have enough reading material to begin with :)? I doubt I'll make an update to the amplifier design at this stage since I've gotten it working, but never know.
On Sun, Dec 31, 2017 at 3:50 PM, Glenn <glennp@...> wrote: My Control board takes a plug IN NANO baord and caters for a few different display type from parallel LCD's to I2C devices. It has provision for LED's to indicate which relay combination of L&C is slectedas it tunes.? Overkill really....... PCB could be made much smaller of course.
-- Martin Held - AE7EU
-------------------------------------------------------------------------------
If there aren't any questions, then what is there to learn?
|
QRZ has changed their link policy so you’ll have to type in my call sign for now.
Dave WI6R
toggle quoted message
Show quoted text
On Dec 31, 2017, at 3:55 PM, Dave Bottom < ars.kd6az@...> wrote: Happy New Year to all.
Received mine on the 24th (lucky I ordered on the 10th).
Got my case yesterday late afternoon and finished the case prep before turning in.
Wired up this morning. It’s alive!!! First contact 600 Miles - 59 report.
See top of my QRZ page for pictures.
Off to build a Mic pre-amp with Mic Gain control. Then work on paddle interface.
Dave WI6R Sent from my iPhone Same here 12/23 date. Pretty excited!? Thank you, Farhan!
Tom
AB7WT
|
Bob McMillan
ekelley
Raj vu2zap