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.

Eric

Wonderful offer. I don't know Thom but remember him from qrp-l. In my judgment a small team of builders can take turns working on his rig, in parallel with your own rigs.

Important is to find out what kind of enclosure he has, but even the standard supplied wiring is good. I see his email is on qrz.com. email him personally to see if he can drive, or whether you need to pick up his rig.

Your timing seems better, as we already finished much of our build here in Carroll County, more than 2 dozen rigs. Check out our K3PZN ubitx page for some good info.

Curt WB8YYY

Good to have an alternate drawing of how to wire up a uBitx.
We often have questions here from puzzled kit builders.

However,

The 2 reverse protection diodes should be after the fuses, not before, so the fuses
will blow if the diodes conduct.? Those diodes might conduct the full current of
a small supply, in which case it could work as is.? (Though they should be Schottky diodes.)
They could fail with a short at high currents, which is also ok.? Or they could blow
molten silicon across the room and be open when you plug in your 20 Amp power
supply backwards, in which case you will destroy many parts on your uBitx.

I would instead add a schottky diode (lower forward voltage drop than a 1n4007)
in series with the fuse for the main supply into the uBitx.? We can afford to lose 0.3 volts there.

No real need for reverse protection on PA-PWR, as the IRF510's have their own intrinsic
reverse diode.? You might burn a board trace or coil between the PA-PWR connector and IRF510,
this would be easy to fix.? But reversing the main 12V into the uBitx will blow?
a bunch of stuff (including everything on the Raduino), and be very difficult to repair.

The fuse for the main supply into the uBitx should be 1 Amp, perhaps even 1/2 Amp.
But definitely not 5 Amps.? 2 Amps could be about right for the PA PWR, maybe 3
if feeding it 20V.

Opinions will vary, we've had long discussions here about reverse protection.
But I doubt many will say this drawing is correct.
I have not looked hard at it beyond the power supply connections.

Jerry

I ordered RMItaly KL203 and will give it a short to work with ubitx once it arrives here.

Hi everyone !

OK, you'll now find the new version of the wiring diagram in the wiki :?/g/BITX20/wiki/uBITX-Assembly

You will now be able to download an HD PDF and also, in the CAD folder you will find the SVG source file :?/g/BITX20/files/uBITX%20CAD%20Drawings
--
73's
Adrien F4IJA

On Tue, Sep 3, 2019 at 01:44 AM, Ian Reeve wrote:

I am sure you single push the encoder and not put to save settings

A quick look at the CEC 1.20 firmware!

code Snippet from?void menuSetupCalibration:
//save the setting