Date   

Re: digitial s-meter

BruceN
 

Thanks.  Now this one worked.
--
"To invent, you need a good imagination and a pile of junk"  -- Thomas Alva Edison (1847-1931)


Re: digital s-meter/power meter forubitx

BruceN
 

Link isn't good.
--
"To invent, you need a good imagination and a pile of junk"  -- Thomas Alva Edison (1847-1931)


Re: digital s-meter/power meter for ubitx

BruceN
 

Huh?
--
"To invent, you need a good imagination and a pile of junk"  -- Thomas Alva Edison (1847-1931)


Re: Some Improvements to the stock V6 code #bfo #calibration #firmware #ubitxv6

shyamhegde
 

Thanks Guru. I loaded your work on my  uBitx V6 and everything works cool. Added features are helpful and interface is smooth with better color combo.


Re: Okay new quesetion #antennas #v6

Ralph Mowery
 

A SWR meter is all that is needed to adjust simple antennas.  However the nano VNA makes it easy to see where the antenna is resonate.  You can take them out to the antenna so you do not have to go to the shack to check the SWR.  Those things are really very accurate.  Much more so than you would think for an instrument under $ 100.  Go for the newer 4 inch screen .  They can also be hooked to a laptop for a large display.  If you have an extra $ 50 to $ 100 to spend I say go for it.

Ralph ku4pt


On Wed, Apr 15, 2020 at 1:11 PM Rene <rmvanb@...> wrote:
Hello i am thinking to buy an NanoVna analyzer. Maybe somone has  experience with the Bitx and anayzing his antenna etcetc???
Regards
Rene
Netherlands
_._,_._,_

,_


Re: Okay new quesetion #antennas #v6

ajparent1/kb1gmx <kb1gmx@...>
 

Russ,

All true until you get high enough and it starts going down.

I'd describe it as higher the closer to 70 ohms (natural impedance for dipole).
Also at less than .25 lambda the impedance is lower than 50 ohms and the length
will be shorter due to ground reflection and loading.


Allison
---------------------------------
No direct email, it goes to bit bucket due address harvesting in groups.IO


Re: ubitx v6 board only

Ismo Väänänen OH2FTG
 

How cheap was the 5A 14V smps supply used? 
As many cheap units lack some or all filtering to save a penny.
You could also have strong local qrm, have you tried any other receiver with the same antenna?


Re: Okay new quesetion #antennas #v6

Russ KG0BK
 

As the antenna raised (or lowered) from ground . . . the impedance changes.
The closer to the ground . . .the lower the impedance. Higher from the ground . . . the greater impedance.
You need to adjust the antenna at the point you will be using it from.
Surroundings in the vicinity of the antenna will also produce various VSWR.
Russ  KG0BK


Re: Okay new quesetion #antennas #v6

Rene
 

Okay nice John, i orderd 1😂😂


Re: digitial s-meter

James George <ki0ad2@...>
 

Too cool!


On Thu, 16 Apr 2020, 6:24 p.m. talmadge huckabee via groups.io, <thuckabee3=verizon.net@groups.io> wrote:
web address should have been forum.arduino.cc/index.php?topic=403234.0


Re: uBitx v.4 build information

Rubens Kamimura
 

Evan, 

Obrigado pelas imagens.
Consegui queimar mais IRF510, hoje a tarde.
Inclusive os condutores +B (13,8Vcc e +B PA Power).

Evan,
Thanks for the images. I managed to burn more IRF510, this afternoon. Including + B conductors (13,8Vdc and + B PA Power).

 73 PY2PVB

Rubens Kamimura



Em qui., 16 de abr. de 2020 às 17:11, Evan Hand <elhandjr@...> escreveu:

As promised in my prior replay, here is the link to the oscilloscope screen pictures that I took:
https://groups.io/g/BITX20/message/72786

Note that these are for test point 3 to 7 (in reverse order on the email).

Hope this helps.
73
Evan
AC9TU


digital s-meter/power meter for ubitx

talmadge huckabee
 

look at files/digital for upload files


digital s-meter/power meter forubitx

talmadge huckabee
 

While at home in lock_down i saw this Web site (Forum.arduino.cc/index?topic=403234.0)
about a adding a digital S-meter/power meter using a arduino board, it looked good project for my
cubit ver 5 radio so, I started to look to see what i needed to use this software.
My ubitx radio has the CEC firmware Ver 1.2 with a 5" Next ion display, also i installed
the Standalone Signal Analyzer(ic2 signal-meter).I uploaded pictures of the insulation
and drawings of the circuits. The vu meter is connected  to the microphone input on the
the ubitx board you'll need CEC firmware ver 1.2 to use it. Just press the TX STOP
Button then press the mic PTT Button then set Smeter/vu meter switch to vu, the oled
display will display microphone output level (there ubitx will not xmit).
The power meter scale needs to be changed the scale goes up to 100w, I need to change
it to read 30w scale.I use a arduino mini pro just becouse i had one!


If you feeling boring those days ....

Johan Holstein
 


Re: uBitx v.4 build information

Evan Hand
 

As promised in my prior replay, here is the link to the oscilloscope screen pictures that I took:
https://groups.io/g/BITX20/message/72786

Note that these are for test point 3 to 7 (in reverse order on the email).

Hope this helps.
73
Evan
AC9TU


Re: TX frequency is 1.2 kHz off #bfo #calibration #cw #v6

James George <ki0ad2@...>
 

Remember to go to usb for cw if you try to use leg the frequency will be off. There are lots of quirks and the tube video is misleading if you zero beat a am signal which is 6 khz wide you will probably be off frequency instead for a ssb station and tune to them.  Bfo should be somewhere close to 11.056
73
Jim/ ki0ad

On Thu, 16 Apr 2020, 1:50 p.m. , <9a6cw@...> wrote:
73 to all
Have the same problem with new ubix V6,1 rx/tx shift is 1kHz .. Calibration metod described in the youtube video make freq. exact and ssb audio is clear !! but cw is unusable...
Where can I find firmware or how to solve this FUNDAMENTAL problem.
thanks in advance

Ivica 9a6cw


Re: TX frequency is 1.2 kHz off #bfo #calibration #cw #v6

9a6cw@...
 

73 to all
Have the same problem with new ubix V6,1 rx/tx shift is 1kHz .. Calibration metod described in the youtube video make freq. exact and ssb audio is clear !! but cw is unusable...
Where can I find firmware or how to solve this FUNDAMENTAL problem.
thanks in advance

Ivica 9a6cw


Re: Okay new quesetion #antennas #v6

John Faivre
 

I built a 20/40 dipole and was really struggling getting the resonance points where I needed them to be using my radio and SWR meter. I finally ordered a nanovna and was able to dial it in quickly hanging about 8 feet above the ground. Then when I hung it above my roof I needed to tweak it a bit more. Now my min SWR is right not the FT8 frequencies. I did not have to get into a lot of theory, just did SWR sweeps over selected frequency widths. Great tool for tuning an antenna. 
--
John Faivre WA9SGD


Re: uBitx v.4 build information

Rubens Kamimura
 

Hi Evan

It was feeding the PA with 20Vdc, through a boost (step up converting 13.8Vdc to 20Vdc), therefore with a different power supply.
I noticed that I am not receiving any signal on JTDX (FT8) at the moment. I'll check if signs will arrive later to be sure. With reference to the oscilloscope (type) I have two of two channels if I'm not mistaken, I need to remove the cobwebs ... check if I still have their software on the laptop ... then I will check the signals on the gates, emitter of Q90, etc.
73

Rubens PY2PVB
--
Saudações fraternais, 73/51 PY2PVB

Rubens Kamimura
Tel. (18) 3746-8680 ramal 116
Cel. (18) 9-9819-2225 WhatsApp ou (18) 9-9819-2255 


Em qui., 16 de abr. de 2020 às 14:28, Evan Hand <elhandjr@...> escreveu:

Rubens,
Suggestion, verify that the receive function works, then try the transmit function without the power to the PA connection.  You should be able to verify the bias settings as being adjustable from 0 volts to 4 volts or so.  The bias is only applied when the PTT or CW ket is pressed.

I would also check to see if I am getting a drive signal at the gate of the finals.  I did this on my uBITX using an oscilloscope.  I cannot find the pictures I took, and need to run out and get food.  Will check again later.

73
Evan
AC9TU


Re: uBitx v.4 build information

Evan Hand
 

Rubens,
Suggestion, verify that the receive function works, then try the transmit function without the power to the PA connection.  You should be able to verify the bias settings as being adjustable from 0 volts to 4 volts or so.  The bias is only applied when the PTT or CW ket is pressed.

I would also check to see if I am getting a drive signal at the gate of the finals.  I did this on my uBITX using an oscilloscope.  I cannot find the pictures I took, and need to run out and get food.  Will check again later.

73
Evan
AC9TU

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