Date   

Re: bitx v6 is here

Laurence Oberman
 

Worked for with DHL
Ordered full kit though

On Fri, Dec 13, 2019, 8:13 AM MONEYSMITH <w4nfr@...> wrote:

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:
People,

Here is what it looks like :
And of course, yoiu can buy it on hfsignals.com. 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
3. Grab the new Arduino sketch from https://github.com/afarhan/ubitxv6

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. 


Re: bitx v6 is here

Ashhar Farhan
 

I have added a morse reader already. I shall finish integration to the user interface soon.
Ill check the dhl option tonight. Do pass on any typos and mistakes. I pulled an all nighter and wrapped it up at 4 am.


- f


On Fri 13 Dec, 2019, 7:17 PM Gordon Gibby, <docvacuumtubes@...> wrote:
Excellent.   I sent photos to everyone (70) in our mailing list.   Looks like the version I want to get.   I am limited on time, repairing half dozen heathkit transceivers and working three amplifiers so having a CABINET and the nice display and everything done so nicely is extremely attractive to me.   I'll get one as soon as I can put together the $$ --- need to buy some 572-b's for the amplifiers. 

Gordon



On Fri, Dec 13, 2019 at 8:17 AM Buddy Brannan <buddy@...> wrote:
Well….if nothing else, this upgrade should make it easier for a blind guy to build one of these :-)

Off to look at this update some more.


Buddy Brannan, KB5ELV - Erie, PA
Email: buddy@...
Mobile: (814) 431-0962



> On Dec 13, 2019, at 8:00 AM, Gerry Kavanagh via Groups.Io <gerrykav=yahoo.co.uk@groups.io> wrote:
>
> Nice work, Farhan.
> You are tireless!
>





Re: V4 TX problems and new finals #ubitx-help

 

At 13/12/2019, you wrote:
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


Re: bitx v6 is here

Gordon Gibby
 

Excellent.   I sent photos to everyone (70) in our mailing list.   Looks like the version I want to get.   I am limited on time, repairing half dozen heathkit transceivers and working three amplifiers so having a CABINET and the nice display and everything done so nicely is extremely attractive to me.   I'll get one as soon as I can put together the $$ --- need to buy some 572-b's for the amplifiers. 

Gordon



On Fri, Dec 13, 2019 at 8:17 AM Buddy Brannan <buddy@...> wrote:
Well….if nothing else, this upgrade should make it easier for a blind guy to build one of these :-)

Off to look at this update some more.


Buddy Brannan, KB5ELV - Erie, PA
Email: buddy@...
Mobile: (814) 431-0962



> On Dec 13, 2019, at 8:00 AM, Gerry Kavanagh via Groups.Io <gerrykav=yahoo.co.uk@groups.io> wrote:
>
> Nice work, Farhan.
> You are tireless!
>





Re: V4 TX problems and new finals #ubitx-help

Don - KM4UDX
 

Ah...understood. I have both a dummy load and separate PA power supply, so I can lift that as well. 

Funny that the water heater started cycling last night. These things always go bad at either Thanksgiving or Christmas. Weird. So I'm fixing that first. Then back to the uBITX.

Thanks so very much!!!

I'll report back the results.

Don


Re: bitx v6 is here

Buddy Brannan
 

Well….if nothing else, this upgrade should make it easier for a blind guy to build one of these :-)

Off to look at this update some more.


Buddy Brannan, KB5ELV - Erie, PA
Email: buddy@...
Mobile: (814) 431-0962

On Dec 13, 2019, at 8:00 AM, Gerry Kavanagh via Groups.Io <gerrykav=yahoo.co.uk@groups.io> wrote:

Nice work, Farhan.
You are tireless!


Re: bitx v6 is here

MONEYSMITH
 

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:
People,

Here is what it looks like :
And of course, yoiu can buy it on hfsignals.com. 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
3. Grab the new Arduino sketch from https://github.com/afarhan/ubitxv6

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. 


Re: bitx v6 is here

Gerry Kavanagh
 

Nice work, Farhan.
You are tireless!


Re: bitx v6 is here

Dale Hardin
 

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
Elberta, AL 

--
Dale Hardin, KS4NS
Elberta, AL


#ubitx #ubitx-help #v5 #calibration Calibration procedure needed #ubitx #ubitx-help #v5 #calibration

Przemek
 

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 this 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. 


Re: bitx v6 is here

Ashhar Farhan
 

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


Re: bitx v6 is here

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


Re: V4 TX problems and new finals #ubitx-help

Evan Hand
 

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


Re: bitx v6 is here

Goran Skular
 

Thank you Farhan.
I just received and wired ubitx5.. and now ordered a new one :)

Looking forward.


On Fri, 13 Dec 2019, 07:56 Ashhar Farhan, <farhanbox@...> wrote:
People,

Here is what it looks like :
And of course, yoiu can buy it on hfsignals.com. 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
3. Grab the new Arduino sketch from https://github.com/afarhan/ubitxv6

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. 


Re: bitx v6 is here

Ashhar Farhan
 

Whoops, I meant www.robu.in (for indian buyers)

73, f

On Fri, Dec 13, 2019 at 12:58 PM Ashhar Farhan via Groups.Io <farhanbox=gmail.com@groups.io> 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


Re: bitx v6 is here

Ashhar Farhan
 

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


Re: bitx v6 is here

Anthony Gomes
 

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


bitx v6 is here

Ashhar Farhan
 

People,

Here is what it looks like :
And of course, yoiu can buy it on hfsignals.com. 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
3. Grab the new Arduino sketch from https://github.com/afarhan/ubitxv6

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. 


Re: Black Squares on Raduino Display Redux #bitx40 #raduino

 

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
Kit-Projects.com

Shop is open!


Re: µBITX & QRP labs 50W PA

Ashhar Farhan
 

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

On Fri, Dec 13, 2019 at 10:36 AM Hans Summers <hans.summers@...> wrote:

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 http://qrp-labs.com/linear 

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