I HAVE BEEN TRYING TO ORDER A V6 WITH DHL SHIPPING TODAY. THE
SITE WILL NOT LET ME DO THE DHL? ANY IDEAS.
I AM IN SALOME ARIZONA USA AND DHL WORKS HERE?
WILLIAM
On 12/12/2019 11:56 PM, Ashhar Farhan
wrote:
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Show quoted text
People,
Here is what it looks like :
And of course, yoiu can buy it on .
The shipping will happen from Tuesday onwards. We have a
limited supply of the first 200 boards. The rest is for after
christmas.
The most important thing about this revision is that the?
Radio circuitry is almost unchanged. We have incorporated the
connectors on the PCBs. So, this kit needs none of the
confusing soldering. You snap in the TFT Raduino onto the main
board, plug the power and antenna from the back, snap on
headphones, plug in the mic (supplied with the kit) and off
you go!
It is offered in two kits now : The basic kit (150 USD) is
without the box (like old times) but with a microphone and two
acrylic templates for the front and back panels.?
The Full kit (199 USD) has the box with speaker, mounting
hardware?etc. Both are described on the website.?
Now, about the TFT display:?
For those who are using the 16x2 display and you would like
to upgrade, you will have to do three things:
1. Add a heatsink to the 7805 of the raduino
2. Buy??and
hook it up as per?
3. Grab the new Arduino sketch from?
Background :?
I have been hacking away at adding a TFT display for the
Arduino for sometime. Finally, I managed to do this with a
really inexpensive 2.8 inch TFT display that uses a controller
called the ILI9341. The display update is slow but, clever guy
that I am, the display very usable. it uses the same pins that
earlier connected to the 16x2 LCD display. This display is
available everywhere for a few dollars.?
|
Nice work, Farhan.
You are tireless!
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I like the upgraded display.? I assume I will be able to upgrade my v5.? Will the new sketch allow boards earlier than v5 add the display?? Dale
On Fri, Dec 13, 2019 at 3:11 AM Ashhar Farhan < farhanbox@...> wrote: To paraphrase Heathkit "We won't let you Solder''
On Fri 13 Dec, 2019, 2:14 PM Tom, wb6b, < wb6b@...> wrote: Impressive upgrade. Amazing you were able to squeeze this into the Nano processor. I'll try the upgrade to this new display on my older uBitx.
Tom, wb6b
--
--
Dale Hardin, KS4NS
Elberta, AL
|
Hi!
I need a recipe for calibrating my ubitx.?
What i got:
- uBITX!
- uBITX Manager
- latest CEC firmware?
- dummy load?
- SDR receiver (FunCube Dongle Pro +)
- poor antenna (long wire for 40m band)
-?I can't receive WWV
I read?article.?But I don't know what the calibration procedure should look like.?
Why my uBITX need calibration. First the receive frequency is shifted up by 3 kHz. Second the voice (for USB and LSB) is totally misunderstood.?
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To paraphrase Heathkit "We won't let you Solder''
On Fri 13 Dec, 2019, 2:14 PM Tom, wb6b, < wb6b@...> wrote: Impressive upgrade. Amazing you were able to squeeze this into the Nano processor. I'll try the upgrade to this new display on my older uBitx.
Tom, wb6b
|
Impressive upgrade. Amazing you were able to squeeze this into the Nano processor. I'll try the upgrade to this new display on my older uBitx.
Tom, wb6b
|
No, you will need to go into transmit mode.? Unless you have a dummy load, I would disconnect the power from the finals (the brown wire on the 3 wire connector for power to the board).? That way you can hold down the CW key for long periods without actually transmitting.? If you have a dummy load you can use that, just keep the transmissions a reasonable length to not over heat the finals again.
73
Evan
AC9TU
|
Thank you Farhan. I just received and wired ubitx5.. and now ordered a new one :)
Looking forward.
People,
Here is what it looks like :
And of course, yoiu can buy it on . The shipping will happen from Tuesday onwards. We have a limited supply of the first 200 boards. The rest is for after christmas.
The most important thing about this revision is that the? Radio circuitry is almost unchanged. We have incorporated the connectors on the PCBs. So, this kit needs none of the confusing soldering. You snap in the TFT Raduino onto the main board, plug the power and antenna from the back, snap on headphones, plug in the mic (supplied with the kit) and off you go!
It is offered in two kits now : The basic kit (150 USD) is without the box (like old times) but with a microphone and two acrylic templates for the front and back panels.? The Full kit (199 USD) has the box with speaker, mounting hardware?etc. Both are described on the website.?
Now, about the TFT display:?
For those who are using the 16x2 display and you would like to upgrade, you will have to do three things: 1. Add a heatsink to the 7805 of the raduino 2. Buy??and hook it up as per? 3. Grab the new Arduino sketch from?
Background :? I have been hacking away at adding a TFT display for the Arduino for sometime. Finally, I managed to do this with a really inexpensive 2.8 inch TFT display that uses a controller called the ILI9341. The display update is slow but, clever guy that I am, the display very usable. it uses the same pins that earlier connected to the 16x2 LCD display. This display is available everywhere for a few dollars.?
|
Whoops, I meant (for indian buyers)
73, f
On Fri, Dec 13, 2019 at 12:58 PM Ashhar Farhan via Groups.Io <farhanbox= [email protected]> wrote: Anthony, you can easily upgrade to the tft display. It costs about Rs.600 from www.robu.ib
On Fri 13 Dec, 2019, 12:47 PM Anthony Gomes, < vu3jvx@...> wrote: Thank you Farhan Sir.? Now we know what was brewing at HF Signals. I just completed my homebrewing of V5 ubitx from scratch, looks like time to go back to my bench again :)? I would love to come down to LARC meet but this year I have to give it a skip.
73
Anthony
VU3JVX
|
Anthony, you can easily upgrade to the tft display. It costs about Rs.600 from www.robu.ib
On Fri 13 Dec, 2019, 12:47 PM Anthony Gomes, < vu3jvx@...> wrote: Thank you Farhan Sir.? Now we know what was brewing at HF Signals. I just completed my homebrewing of V5 ubitx from scratch, looks like time to go back to my bench again :)? I would love to come down to LARC meet but this year I have to give it a skip.
73
Anthony
VU3JVX
|
Thank you Farhan Sir.? Now we know what was brewing at HF Signals. I just completed my homebrewing of V5 ubitx from scratch, looks like time to go back to my bench again :)? I would love to come down to LARC meet but this year I have to give it a skip.
73
Anthony
VU3JVX
|
People,
Here is what it looks like :
And of course, yoiu can buy it on . The shipping will happen from Tuesday onwards. We have a limited supply of the first 200 boards. The rest is for after christmas.
The most important thing about this revision is that the? Radio circuitry is almost unchanged. We have incorporated the connectors on the PCBs. So, this kit needs none of the confusing soldering. You snap in the TFT Raduino onto the main board, plug the power and antenna from the back, snap on headphones, plug in the mic (supplied with the kit) and off you go!
It is offered in two kits now : The basic kit (150 USD) is without the box (like old times) but with a microphone and two acrylic templates for the front and back panels.? The Full kit (199 USD) has the box with speaker, mounting hardware?etc. Both are described on the website.?
Now, about the TFT display:?
For those who are using the 16x2 display and you would like to upgrade, you will have to do three things: 1. Add a heatsink to the 7805 of the raduino 2. Buy??and hook it up as per? 3. Grab the new Arduino sketch from?
Background :? I have been hacking away at adding a TFT display for the Arduino for sometime. Finally, I managed to do this with a really inexpensive 2.8 inch TFT display that uses a controller called the ILI9341. The display update is slow but, clever guy that I am, the display very usable. it uses the same pins that earlier connected to the 16x2 LCD display. This display is available everywhere for a few dollars.?
|
Pat,
The last one (Bitx40 I built a few months back) I had put the display connection in on the wrong set of pins, a common issue with the current instructions.
I would check to make sure its in the right spot (post a pic maybe). It sounds like the nano is dead, I had the very same issues. Boots, screen on, black squares....death everything went blank.
While the nano leds will still work the rest is dead.
If you haven't get a spare nano clone or otherwise and try flashing the firmware before even plugging it into the radio.
Hope that helps
73
--
David
?N8DAH
|
Re: ?BITX & QRP labs 50W PA
Hans, Even 25 ma idle current should be enough, given that it is a push pull amplifier and a large part of the power cycle keeps one or the other transistor switched on. - f
Hi all
Changing amplifier class is firstly a matter of altering the idle current. It requires an increase in bias to increase the idle current (NOT a decrease in bias). That is the first thing to try.?
But it would help to have capability to measure the results to see how good the linearity is and what the limitations are. Two tone audio test signal and RF spectrum analyzer.?
The circuit is essentially similar to my 10W Linear kit ?
Yes biasing the transistors for 125mA each (for example) would dissipate power straight away even with no input. That would be 2.5W per transistor at 20V supply. Whether it needs MORE cooling or not is not so straightforward to answer though. CW is a full power, intermittent carrier. SSB operates at a lower average level but without so many breaks (except when you take a breath etc). Any speech processing you have will increase the average power. Which is more, CW or SSB... I think it needs some experiment. Probably this amp can be biased to AB but I haven't had time to test all this as yet.?
73 Hans G0UPL? ?
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Re: ?BITX & QRP labs 50W PA
Hi all
Changing amplifier class is firstly a matter of altering the idle current. It requires an increase in bias to increase the idle current (NOT a decrease in bias). That is the first thing to try.?
But it would help to have capability to measure the results to see how good the linearity is and what the limitations are. Two tone audio test signal and RF spectrum analyzer.?
The circuit is essentially similar to my 10W Linear kit ?
Yes biasing the transistors for 125mA each (for example) would dissipate power straight away even with no input. That would be 2.5W per transistor at 20V supply. Whether it needs MORE cooling or not is not so straightforward to answer though. CW is a full power, intermittent carrier. SSB operates at a lower average level but without so many breaks (except when you take a breath etc). Any speech processing you have will increase the average power. Which is more, CW or SSB... I think it needs some experiment. Probably this amp can be biased to AB but I haven't had time to test all this as yet.?
73 Hans G0UPL? ?
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Don,
In RX mode, relay K1 is not providing 12v to the TX power rail,
so transistors? Q911,Q912, Q92, Q93, Q96 and Q97 are not powered up.
I suggest you disconnect PA-PWR from your power supply so the IRF510 drains
are not getting power.? Then press PTT to put the rig in transmit mode
and measure those voltages for Evan.? That way the IRF510's won't be getting hot,?
and there is no need to put a dummy load on the antenna port.
Some parts of the driver amps might get warm if you hold down PTT too long,
I really don't know.
I'd let up on the PTT switch when not actually looking at the voltmeter.
Jerry
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On Thu, Dec 12, 2019 at 07:20 PM, Don - KM4UDX wrote:
Evan - for testing the transistors, do I have the board in normal RX mode?
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Evan - for testing the transistors, do I have the board in normal RX mode?
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Two ways to go forward at this time:
1 - Measure the bias voltages on the transistors
2 - Remove the transistors and do typical diode check on each junction
I would do the bias voltage checks.
You are concerned with Q911,Q912, Q92, Q93, Q96 and Q97.
When I measured the voltages relative to ground I got aproximatly 12.3 volts on Q911 and Q912 collectors, 1.13 on the base and .46 on the emitter.
For Q92, Q93, Q96 and Q97 I measured 11.4 volts on the collectors, 1.12 volts on the bases and .46 on the emitters.
See if any of these transistors have the wrong bias voltages.? That would indicate which ones to pull to test.
Note, the values are approximate.? The important value is the difference between the base and the emitter.? Should be around .7 volts.? Indicates it is conducting properly and not shorted or open.
Only real test that I know is to measure the RF voltages, That is why I use a 100 MHz oscilloscope.?
Try the above and let us know.
73
Evan
AC9TU
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I may get a scope next week. Of course I have? no idea how to use it, but my guru (Dan, W3BU) has kindly agreed to some brief training.
I have a DVM and lots of stick-2-it-tivness.? So they are my tools for now!
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Evan and Co.? I opened RV1 all the way and that gave me a small momentary deflection of power meter.? But essentially RV1 setting doesn't appear to be the problem.?
Here is a short vid of RV1 full open and clicking the CW jack.
At least nothing really bad happens?
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Dale Hardin KS4NS
Przemek
Goran Skular
N8DAH