The CEC v1.097 is not compatible with the v 5 board.? You need the version 1.2 or higher??

Here is the Hamskey link:


73
Evan
AC9TU

Also I have a V5 board. I'll reload the orrig software to compare.
Thanks- Steven KM4WIP

I'm using the Arduino environment to upload the software. Took several attempts and only worked when I selected "old bootloader" when verifying
Steven KM4WIP

First off, what version of uBitx?? If it is not v3 or 4, then you need the 1.2 version of the CEC software.? The IF for the v5 boards is different and requires a different software version or recompile with the correct flag set in the code.

If you have a version 3 or 4, then the most likely issue is the BFO frequency is off.? The way that I do the BFO calibration is to tune to a quite frequency on the ruBitx, feed the audio outpput of the speaker through a mic to a PC running a free audio spectrum analyser software and adjust the BFO to peak be between 500 and 2,500 hertz.

You may need to go back to the WWV calibration to adjust the base frequency, as that can change.? In general 2 repeats did it for me.

Here is the link to the PC audio analyzer that I use:


73
Evan
AC9TU
?

If you downgrade back to the version you were happy with do you still have the same results?? That would at least eliminate propagation changes or hardware issues.
--

Probably missed matching the firmware with your version of hardware as filters have changed in V5 of the hardware.
Are you loading the hex files or compiling/linking the source code?

Hi all,

First thanks for all the good advice on correctly wiring the mic. It worked and the uBitX project is progressing nicely. I made three contacts in TX,TN, and LA from VA. Every time I tune through 40 meters I hear a lot of traffic. I'm pretty happy! (I wish the CW function worked though)

Last night I upgraded to CEC FW v1.097. I was so excited to see it load. Unfortunately the results are disappointing. Now when I tune through 40 meters all I hear is light static. No traffic. Nothing. I tried to calibrate but can't get a WWV 10MHz signal.

Any suggestions? What did I miss?

Thanks,
Steven KM4WIP

Thank you Allison for the answer. So if I put the PA voltage from 12v to maybe 16v it will not worth the pain regarding the final output power??
--
73's
Adrien F4IJA

开云体育

Have you tried Memory Manager to see if anything changes?
I had problems at first because my changes didn't seem to take.
What I did:
Power off Ubitx and connect USB cable from Ubitx to PC
Start Memory Manager and press Connect to set communication with Raduino
Press Read From Ubitx
Press Decode and make note of calibration values
Shutdown Memory Manager and disconnect USB from PC
Power on
Make calibration changes and press PTT for about 2s and Calibration Set appears
Power down Ubitx and power on
Power down Ubitx and connect USB to PC
Start Memory Manager and again press Connect then Decode
Press? Read from Ubitx then press Decode
You should see your calibration values have changed

If values are not changing then there must be an issue with Nano I would suspect.
Hope this helps.
Vince

?

Running th efinal at high power with 100ma bias means that at 12V your heating
them at 1.2W no signal.? Bring that up to 24V and its 2.4W of heat.??

To run at higher voltages you need to insure the heatsinks and air circulation
are adequate.? ? Heat is a known killer.

However you will still be power limited as the drive level does not change with
increased voltage to the finals (separate power bus).? So the increase is notable
but not hugely greater.? HINT:? if you don't increase the power by a factor
of 4 the other guy will not have a clue (he will not hear it).

Allison

Thanks gary, yes i'ved tried to push ptt longer but nothing changed...yes i see "calibration set! Etc" message...on power on everything is lost...maybe a e2prom defect in the arduino??

On Wed, Sep 4, 2019 at 12:12, Mark - N7EKU

<n7eku@...> wrote:

Hi Adrien,

See this post:? /g/BITX20/message/53765

73,


Mark.

Hats off Allison for a nice treat in this poat . Messages are crisp and digestible. Many thanks

Regards
?vu3zmv

Hi Adrien,

See this post:? /g/BITX20/message/53765

73,


Mark.

Hi Adrien,

See this post:? /g/BITX20/message/53765

73,


Mark.

Jerry : that's OK, I've figured out why there is 2 power slots.

I've asked here another question though :?/g/BITX20/topic/max_pa_pwr_voltage/33139548?p=,,,20,0,0,0::recentpostdate%2Fsticky,,,20,2,0,33139548
--
73's
Adrien F4IJA

Hello,

What is the max PA PWR that can be supplied to the ubitx ? Also, what is the output power benefit to have more voltage on the finals of the PA PWR ?

Thank you,
--
73's
Adrien F4IJA

Thank you Jerry,

For now I've just reworked the drawings, based on the old one. It's better quality and very good to print.

I've some questions on my side too :

What is really the difference beetween PA PWR and +12V ?

Isn't it more simple to enpower just by the Alternate power? with a switch, connected both on PA PWR and +12V all the time, even though you power the ubitx with battery or with DC supply ?
--
73's
Adrien F4IJA

Hi,

This one looks like it has no low pass filters installed, thus it would be illegal to use in most countries unless band-specific low pass filters were used between the amp and antenna.

73,


Mark.