Topics

ubitx BFO Calibration issue

hardrain
 

Hi, thanks everybody to begin with, since this group is a source of information and inspiration for my adventures with the little ubitx. Now, I suspect this is a vexata quaestio but as hard as I've searched I haven't found the answer.

I'm trying to calibrate the bfo on my v5.1 with stock firmware. When I find a setting I like I press the knob and the display reads "carrier set". But  the setting was not actually saved, if I re-enter the BFO setting menu I find the original value (and I can hear that the BFO frequency is the old one). What's the correct procedure to save my value?

Thanks and 73,
IZ1HNY Raffaello

Herman Scheper
 

You have to use your transmit knob on your mike!!

Herman vanaf z'n IPad.

Op 19 nov. 2019 om 21:57 heeft hardrain@... het volgende geschreven:

Hi, thanks everybody to begin with, since this group is a source of information and inspiration for my adventures with the little ubitx. Now, I suspect this is a vexata quaestio but as hard as I've searched I haven't found the answer.

I'm trying to calibrate the bfo on my v5.1 with stock firmware. When I find a setting I like I press the knob and the display reads "carrier set". But  the setting was not actually saved, if I re-enter the BFO setting menu I find the original value (and I can hear that the BFO frequency is the old one). What's the correct procedure to save my value?

Thanks and 73,
IZ1HNY Raffaello

Jim Willis
 

Hi Raffaello,

 

I had a similar experience.

 

I think the “set BFO” software starts with the default value. So every time you repeat the BFO calibration, the SW starts with the default. It seems like the previous calibration didn’t “take”.

 

As for clicking the knob vs. the transmit button, the tuner knob seems to work for me.

 

So, try the BFO calibrate procedure and use the tuner knob then listen to a SSB signal. If the SSB signal is still good then all is OK. If this doesn’t work then try the transmit button.

 

Good luck! Love my uBITx – I’ve learned a lot about radio from it!

 

73,

 

Jim KX4TD

 

From: BITX20@groups.io <BITX20@groups.io> On Behalf Of hardrain@...
Sent: Tuesday, November 19, 2019 3:58 PM
To: BITX20@groups.io
Subject: [BITX20] ubitx BFO Calibration issue

 

Hi, thanks everybody to begin with, since this group is a source of information and inspiration for my adventures with the little ubitx. Now, I suspect this is a vexata quaestio but as hard as I've searched I haven't found the answer.

I'm trying to calibrate the bfo on my v5.1 with stock firmware. When I find a setting I like I press the knob and the display reads "carrier set". But  the setting was not actually saved, if I re-enter the BFO setting menu I find the original value (and I can hear that the BFO frequency is the old one). What's the correct procedure to save my value?

Thanks and 73,
IZ1HNY Raffaello

Evan Hand
 

One other ting to try is power cycling the uBITX between calibrations.  The BFO setting is read from EEprom on startup.  I follow the seting, then immediately power cycle and then test (not going back into calibration, as that will reset to the factory default as was said prior).

Be sure to be careful when going into calibration mode with stock v5 software, as if you mistakenly go into the master clock calibration you will trigger the transmitter and can blow your finals if not connected to a dummy load or 10MHz resonant antenna (not common from my experience).  Would strongly suggest investment in a 10 watt or greater dummy load.  QRPLabs makes a 20 watt kit that is reasonable.

http://shop.qrp-labs.com/dummy?search=dummy%20load

73
Evan
AC9TU

hardrain
 

Thanks to all those who answered.

Yes, I've now realized that the software reverts back to default value each time BFO cal is reentered, and this makes hard (and a bit frustrating) to proceed by trials and errors since each  time you loose the improvements you have just made. You can't fine tune, unless you take note on paper.
I did so, and after spending a couple of hours hearing noise, whistles and distorted signals in my headphones, I have obtained a setting that allows me to listen to HAM SSB comms, barely readable, quite metallic and ringing but understandable.
Then, I got an idea. I tuned in Shannon Volmet, thinking, now I'll have a stable and continuous signal to adjust my BFO.
No joy. After one hour I could not make it understandable. The signal itself is very strong and clean, but the voice remains totally 'scrambled' and distorted, over the whole BFO adjusting range.
Maybe my ubitx has some other problem, not BFO related. Tomorrow I'll check. Now my eyes are closing ;)

73

Raffaello

PS
I've considered consider the risk of switching to tx, but if I use a dummy load (I've built one) I can't receive the SSB signal I got to use for calibration.

On 19/11/19 22:13, Jim Willis wrote:

Hi Raffaello,

 

I had a similar experience.

 

I think the “set BFO” software starts with the default value. So every time you repeat the BFO calibration, the SW starts with the default. It seems like the previous calibration didn’t “take”.

 

As for clicking the knob vs. the transmit button, the tuner knob seems to work for me.

 

So, try the BFO calibrate procedure and use the tuner knob then listen to a SSB signal. If the SSB signal is still good then all is OK. If this doesn’t work then try the transmit button.

 

Good luck! Love my uBITx – I’ve learned a lot about radio from it!

 

73,

 

Jim KX4TD

 

From: BITX20@groups.io <BITX20@groups.io> On Behalf Of hardrain@...
Sent: Tuesday, November 19, 2019 3:58 PM
To: BITX20@groups.io
Subject: [BITX20] ubitx BFO Calibration issue

 

Hi, thanks everybody to begin with, since this group is a source of information and inspiration for my adventures with the little ubitx. Now, I suspect this is a vexata quaestio but as hard as I've searched I haven't found the answer.

I'm trying to calibrate the bfo on my v5.1 with stock firmware. When I find a setting I like I press the knob and the display reads "carrier set". But  the setting was not actually saved, if I re-enter the BFO setting menu I find the original value (and I can hear that the BFO frequency is the old one). What's the correct procedure to save my value?

Thanks and 73,
IZ1HNY Raffaello


Maurice Bersan
 

Hardrain, sounds like you probably need to do a factory reset.
Turn the radio off
Then while pressing in and holding the tuning knob turn the power back on.
Follow the on screen instructions.
Sometimes if you get the calibration and bfo to far off its best to just start again.
Good luck

Maurice

On 21 Nov 2019 6:12 a.m., hardrain <hardrain@...> wrote:
Thanks to all those who answered.

Yes, I've now realized that the software reverts back to default value each time BFO cal is reentered, and this makes hard (and a bit frustrating) to proceed by trials and errors since each  time you loose the improvements you have just made. You can't fine tune, unless you take note on paper.
I did so, and after spending a couple of hours hearing noise, whistles and distorted signals in my headphones, I have obtained a setting that allows me to listen to HAM SSB comms, barely readable, quite metallic and ringing but understandable.
Then, I got an idea. I tuned in Shannon Volmet, thinking, now I'll have a stable and continuous signal to adjust my BFO.
No joy. After one hour I could not make it understandable. The signal itself is very strong and clean, but the voice remains totally 'scrambled' and distorted, over the whole BFO adjusting range.
Maybe my ubitx has some other problem, not BFO related. Tomorrow I'll check. Now my eyes are closing ;)

73

Raffaello

PS
I've considered consider the risk of switching to tx, but if I use a dummy load (I've built one) I can't receive the SSB signal I got to use for calibration.

On 19/11/19 22:13, Jim Willis wrote:

Hi Raffaello,

 

I had a similar experience.

 

I think the “set BFO” software starts with the default value. So every time you repeat the BFO calibration, the SW starts with the default. It seems like the previous calibration didn’t “take”.

 

As for clicking the knob vs. the transmit button, the tuner knob seems to work for me.

 

So, try the BFO calibrate procedure and use the tuner knob then listen to a SSB signal. If the SSB signal is still good then all is OK. If this doesn’t work then try the transmit button.

 

Good luck! Love my uBITx – I’ve learned a lot about radio from it!

 

73,

 

Jim KX4TD

 

From: BITX20@groups.io <BITX20@groups.io> On Behalf Of hardrain@...
Sent: Tuesday, November 19, 2019 3:58 PM
To: BITX20@groups.io
Subject: [BITX20] ubitx BFO Calibration issue

 

Hi, thanks everybody to begin with, since this group is a source of information and inspiration for my adventures with the little ubitx. Now, I suspect this is a vexata quaestio but as hard as I've searched I haven't found the answer.

I'm trying to calibrate the bfo on my v5.1 with stock firmware. When I find a setting I like I press the knob and the display reads "carrier set". But  the setting was not actually saved, if I re-enter the BFO setting menu I find the original value (and I can hear that the BFO frequency is the old one). What's the correct procedure to save my value?

Thanks and 73,
IZ1HNY Raffaello



Maurice Bersan
 

Raffaello, sorry about the name mix-up before.

The only way I could get my bfo settings to stick was to do the calibration and bfo settings one after the other at the same time. Then when complete turn radio off and back on.
I tuned into a local QSO and set both calibration and bfo so QSO sounded normal. Easy and worked for me, hope this helps.

Maurice

On 20 Nov 2019 4:57 a.m., hardrain@... wrote:

Hi, thanks everybody to begin with, since this group is a source of information and inspiration for my adventures with the little ubitx. Now, I suspect this is a vexata quaestio but as hard as I've searched I haven't found the answer.

I'm trying to calibrate the bfo on my v5.1 with stock firmware. When I find a setting I like I press the knob and the display reads "carrier set". But  the setting was not actually saved, if I re-enter the BFO setting menu I find the original value (and I can hear that the BFO frequency is the old one). What's the correct procedure to save my value?

Thanks and 73,
IZ1HNY Raffaello


hardrain
 

Well, it did work :)
I've made a factory reset and starting from a 'clean' setting I've been able to make a decent BFO cal and the Volmet lady's voice came out pleasant and understandable. So were a few hams I could tune on 80 and 40m.
Thanks for the suggestions.

73
IZ1HNY Raffaello

On 21/11/19 00:46, Maurice Bersan via Groups.Io wrote:
Raffaello, sorry about the name mix-up before.

The only way I could get my bfo settings to stick was to do the calibration and bfo settings one after the other at the same time. Then when complete turn radio off and back on.
I tuned into a local QSO and set both calibration and bfo so QSO sounded normal. Easy and worked for me, hope this helps.

Maurice

On 20 Nov 2019 4:57 a.m., hardrain@... wrote:

Hi, thanks everybody to begin with, since this group is a source of information and inspiration for my adventures with the little ubitx. Now, I suspect this is a vexata quaestio but as hard as I've searched I haven't found the answer.

I'm trying to calibrate the bfo on my v5.1 with stock firmware. When I find a setting I like I press the knob and the display reads "carrier set". But  the setting was not actually saved, if I re-enter the BFO setting menu I find the original value (and I can hear that the BFO frequency is the old one). What's the correct procedure to save my value?

Thanks and 73,
IZ1HNY Raffaello



IZ4SJP Carlo
 

Hello Raffaello
can you contact me please at my address ctaroz@...? Thanks, 73 to everybody
Carlo