Date   
Re: PSK 31 not decoding

blakephoto@...
 

Thanks everybody for the help.

Give me something more to try.  

ED

Stay tuned

Re: Version 4 bitx squealing after nextion upgrade.

uniflite58
 

Thanks Evan,  The lcd is and was at full brightness. I did not have the cw resistor in place as I didn't plan on using that mode..
The rig worked fine before the upgrade. I installed the nextion then brought it to my computer and loaded the appropriate hex file for the new screen. 

Right after that is when the problem started.  I reverted back to the stock hex file and re-installed the 2 line display and the problem persists.

I think it's cooked.

Re: Help Wanted

Ghericoan
 

To follow up on this, there is a calibration file on this group for the CEC firmware that will get you real darn close. I used it on my board and its close enough to work FT8 with.

data only phone, no call/txt
telegram @folfyshark

On Fri, Dec 14, 2018, 5:22 PM Terence Taylor, <n6mon@...> wrote:
Have an offer of help. Thanks, all!


--
----------
N5WLF, Greggory (or my nickname, Ghericoan)
General Class, Digital Radio Hobbyist

Re: Version 4 bitx squealing after nextion upgrade.

uniflite58
 

It worked perfectly.

Re: Version 4 bitx squealing after nextion upgrade.

_Dave_ AD0B
 

How well was your radio working before you added the nextion?

Re: Version 4 bitx squealing after nextion upgrade.

Evan Hand
 

I would start with verifying that the dimming function is at full lcd bright.  There is a known issue with the chopping circuit on the lcd display causing audio issues.

The issue that I ran into in the upgrade was that the calibrations were all off afterwards.  I velieve this was caused by me loading the software onto another nano. Not sure the root cause, however I have read on this site that holding in the encoder button while powering up the unit will reset to factory settings.  I would try that after checking the lcd setting.

Are you sure you have the resistors CW in place and that the rig is not transmitting (I know, stupid question, however I did run into this one time with my rig.)

After insuring the the rig is not transmitting, disconnect the speaker and verify all of the settings using the CEC configuration screens.

I would also suggest that you download the CEC memory manager program in the google drive link in the following :

This is for modifying old releases to work with the memory manager, but I did find useful info on operation:

Beyond the above, I would need more information on what changed from before to after the upgraded as well as the process used to load the new programs into the nano.

73
Evan
AC9TU

Version 4 bitx squealing after nextion upgrade.

uniflite58
 

I upgraded to a nextion 2.8 last night and its up and running properly. However, all I can hear now is a constant high pitched tone and loud squeaky scratchy sounds when tuning. Volume pot has no effect on volume. I've checked all my connections several times. If I lift the board off the standoffs it gets worse. I do have a good ground to the board.  If I unplug the nextion, the squeal goes away but receive is absolutely dead. I can barely hear the encoder ticks. Antenna is hookep up.  Any Ideas anyone?

Re: Ashhar Farhan #ubitx

 

Sharma,

The SPURS and HARMONICS are two different issues. In my mods and tests of 3 boards, harmonics are
cured with relay change - KT1//2/3 and that reduces the spurs too.

With change of L5/7 with Shielded SMD ONLY or 45MHz LPF ONLY the spurs are fixed but not the
harmonics.

This has been tested on 3 boards here at my lab and also demonstrated to Farhan.

I don't any need for further repeat messages of the same mods ad nauseam.

Raj

At 15-12-18, you wrote:
Why should we replace relays ?
I remember Ashar Farhan's findings regarding source of spurs, and he was trying to treat that section.

The earlier mod was how to remove spurs once created. People had many ways, one being relay replacement. If RF signals even now assemble with old relays, they would have a reason, right.

I suppose, it is better to wait and see the next version board and then adopt the mods with specific reference to that board.
regards
sarma
vu3zmv

Re: Ashhar Farhan #ubitx

MVS Sarma
 

Why should we replace relays ?
I remember Ashar Farhan's findings regarding source of spurs,  and he was trying to treat that section.

 The earlier mod was how to remove spurs once created. People had many ways, one being relay replacement. If RF signals even now assemble with old relays, they would have a reason, right.

I suppose, it is better to wait and see the next version board and then adopt the mods with specific reference to that board.
regards
sarma
vu3zmv

Re: bitx40 displays version, hums, but does not receive #bitx40help #bitx40 #radiuno

Christopher <cmhobbs@...>
 

I have a bitx40 as Bill noted.  Should I have installed a different version of the software?  I'll read the instructions you posted, thanks.

73 DE KD5RYO

Re: uBitx RF Power Amplifier Standalone

Satish Chandorkar
 

Thank you for the information mail JuanCarlos

Satish
VU2SNK

On Sat, Dec 15, 2018 at 1:04 AM Juan Carlos Berberena Glez <cubanqrp@...> wrote:
Hi Guys
I am very happy with the information about the uBitx PA performance tested in Marianao, Havana Cuba by CM2KMK and CO2JT.
Heriberto(CM2KMK) redo the uBitx PA  board and tested with the Lagunero exciter with a very good work inside Cuba and with me in South West Florida(Cape Coral).
Please any concern about the layout or other question  drop an email to
cl2kmk@...
Please notice the email address is as CL and He is now as CM.
Thank you for your time.
Qrv's 
73's Jc

P.D.
http://lu1agp.blogspot.com/2017/12/qrp-ssb-portatil-para-40m-40m-portable.html

WJ6C

https://www.facebook.com/groups/QrpCuba/

Re: The new uBITX boards are here

Alan de G1FXB
 

A Board received 11 December was V4

https://groups.io/g/BITX20/message/62450


Alan

On 15/12/2018 00:54, Bret Mills wrote:
What version Board hardware are being shipped out now 12/14/18?

--
thanks and 73's
Bret
WX7Y

Re: CW Zero Beat

 

Back in stock if you missed them
--
David

 N8DAH
Kit-Projects.com

Shop is open!

Re: calibration and tuning tweak help... #calibration #ubitx-help

Don Winsor
 

As wa, so wee3


On Fri, Dec 14, 2018, 8:54 PM Mark M <junquemaile@...> wrote:
You'll want to change the Master Calibration number, Increasing it lowers the frequency, lowering it raises the frequency.

There are a couple ways (at least) to do it.

The cut & try method is to change the number by a few hundred, save in into the uBitX, and see where it is. Then repeat until you get it where you want it. Lower the number to, say, 155500 and try it, If still to low, drop it another couple hundred, etc.

Or, you can calculate how much to change it with the formula here: http://www.hamskey.com/2018/05/frequency-adjustment-of-ubitx-si5351.html

He goes thru the theory but if you want to cut to the chase, scroll about halfway down to the examples and plug in your numbers. Then change the Master Calibration number based on you calculation, save it to the uBitX, and repeat if necessary.

Write down the Master Calibration number before you start so you can go back to it if you really mess it up.

Hope this helps...

73...     Mark     AA7TA

Re: calibration and tuning tweak help... #calibration #ubitx-help

Mark M
 

You'll want to change the Master Calibration number, Increasing it lowers the frequency, lowering it raises the frequency.

There are a couple ways (at least) to do it.

The cut & try method is to change the number by a few hundred, save in into the uBitX, and see where it is. Then repeat until you get it where you want it. Lower the number to, say, 155500 and try it, If still to low, drop it another couple hundred, etc.

Or, you can calculate how much to change it with the formula here: http://www.hamskey.com/2018/05/frequency-adjustment-of-ubitx-si5351.html

He goes thru the theory but if you want to cut to the chase, scroll about halfway down to the examples and plug in your numbers. Then change the Master Calibration number based on you calculation, save it to the uBitX, and repeat if necessary.

Write down the Master Calibration number before you start so you can go back to it if you really mess it up.

Hope this helps...

73...     Mark     AA7TA

Re: The new uBITX boards are here

Bret Mills
 

What version Board hardware are being shipped out now 12/14/18?

--
thanks and 73's
Bret
WX7Y

New file uploaded to BITX20@groups.io

BITX20@groups.io Notification <BITX20+notification@...>
 

Hello,

This email message is a notification to let you know that a file has been uploaded to the Files area of the BITX20@groups.io group.

File: EasyTRX.pdf

Uploaded By: Alf Edwards

Description:
Google translation to English of Bernard's Transceiver SSB Easy V4

You can access this file at the URL:
https://groups.io/g/BITX20/files/EASY%20V4-1/EasyTRX.pdf

Cheers,
The Groups.io Team

calibration and tuning tweak help... #calibration #ubitx-help

Don - KM4UDX
 

hello oh brilliant ones!

After loading the memory manager out of desperation, 
I un-reversed my reversed side bands and got the BFO good enough.
Praise be the technical guru in the sky and that reset button on the upper right of Mem Manager !! hahaha.

Now, last problem is the tunning. The TX is sending too low by  .178m low. And I'm scared to death to touch the calibration figures in the MM.
I'm sure if I try to fix it without guidance that I will screw up the orbit of the earth. Don't laugh, it isn't that hard..hahah.

What should I do?  and thank you all so much as always!!!

Don
km4udx

Re: The BITeensio board is here. #ubitx

tomv
 




On Dec 13, 2018, at 6:24 PM, Jim Sheldon <w0eb@...> wrote:

Forgot to answer your question.  Yes anything using the RA8875 controller draws too much current.  The 3.3V output from any of the Teensy MPU's is a MAX 250ma and the other chips on the board pull 50-75ma so the 230ma from the 4.3" display will exceed spec by enough to put the MPU in jeopardy.

Jim

On Dec 13, 2018, at 5:07 PM, David Negaard <draagen@...> wrote:

I'm looking at larger displays (would like to avoid the major surgery for a 5", but would like a bigger display than the 2.8"), and I'm seeing a 4.3" TFT with resistive touchscreen, 4-wire SPI, and RA8875 controller that draws 230ma at 3.3 Vdd. Would that still require the extensive mods that the 5" display requires? I'm willing to do it if I have to.

Re: Help Wanted

Terence Taylor
 

Have an offer of help. Thanks, all!