Date   

Re: uBitx "Shadow"

Evan Hand
 

This looks like a BFO adjustment issue to me.  I believe that the carrier is in the waterfall as well.  Another possibility is the balanced mixer with T7 and D5 may have issues.  You could have a filter issue, not sure how to test that without a spectrum analyser.  Last that I can think of off hand is an error in the nano program, though this is the least likely.

I had a similar issue, though it was on LSB.  Adjusting the BFO solved my issue.

FWIW
73
Evan
AC9TU 


Lista component for ubitx 5 #ubitx

CiccioSamui
 

Hi,  may I have a copy oF list component as well please???? 
Thank 


Re: uBitx "Shadow"

 

uBitx version ?

Raj


At 18/05/2019, you wrote:
Hello everyone! I would like to share with you some informations, I installed a new Inverted V antenna for 20m and I discovered that my uBitx is transmitting some "shadow" signal along the center frequency. I can't remember seeing this before, when I was using a zig-zag dipole. This is not happening in LSB. Does anyone know what is this if can be somehow corrected ? [] P


uBitx "Shadow"

YO8UFO
 

Hello everyone! I would like to share with you some informations, I installed a new Inverted V antenna for 20m and I discovered that my uBitx is transmitting some "shadow" signal along the center frequency. I can't remember seeing this before, when I was using a zig-zag dipole. This is not happening in LSB. Does anyone know what is this if can be somehow corrected ? Picture attached. Thanks!


Re: upgrade firmware 0.20 to 3 or 4

danilo datres
 

here  some pics...  for  your help.   tnx in advance  danilo in3izq


Re: Inexpensive eBay Amplifier Kits

freefuel@...
 

Paul, my concern with anything setup for 13.56MHz is the bias levels for the amp, simply because there are no applications I am aware of that call for linear operation in that ISM band!

-Justin N2TOH  


Re: Inexpensive eBay Amplifier Kits

freefuel@...
 

Lee, I've been retired 10 years now, all I do is climb the walls looking for stuff to do! 

-Justin N2TOH 


Re: Antuino - the antenna analyzer

Vic WA4THR
 

They were selling the fully assembled Antuinos for $80 at FDIM.

=Vic=


Re: upgrade firmware 0.20 to 3 or 4

MVS Sarma
 

Upload  a crisp photo on the internal main board.
 let us see.
 


On Sat, May 18, 2019 at 2:01 PM danilo datres <in3izq@...> wrote:
hello,  i'm   in3izq danilo  from  italy. Have  buy  by friend  an  ubitx  , when i  on   her look  at display ubitx  0.20.
can i  upgrade at  version   3  or  4 ?  are a newbie and   work  a little   with  software.   Any  help are   welcome.
best  '73  from  me. danilo in3izq


upgrade firmware 0.20 to 3 or 4

danilo datres
 

hello,  i'm   in3izq danilo  from  italy. Have  buy  by friend  an  ubitx  , when i  on   her look  at display ubitx  0.20.
can i  upgrade at  version   3  or  4 ?  are a newbie and   work  a little   with  software.   Any  help are   welcome.
best  '73  from  me. danilo in3izq


Re: Antuino - the antenna analyzer

Ian vk2ama
 

Obviously


Re: Antuino - the antenna analyzer

MVS Sarma
 

Obvious that only Farhan can bring out the price at the due time


On Sat, May 18, 2019 at 11:18 AM Ian vk2ama <ieand@...> wrote:
I see the Antuino was officially released at FDIM. Anyone know how much it will be to the rest of us?


Re: Antuino - the antenna analyzer

Ian vk2ama
 

I see the Antuino was officially released at FDIM. Anyone know how much it will be to the rest of us?


Re: Antuino

Bruce Hall <bhall66@...>
 

Update:  it works now.  The problem was a cold solder joint on the batt(-) pin of the barrel connector.   I should have looked more closely before posting!

Bruce

On Fri, May 17, 2019 at 7:05 PM Bruce Hall <bhall66@...> wrote:
Farhan,

The unit I received at FDIM works fine with Vcc from the barrel jack, but not from the battery pack.   

Peeking at the PCB, the power circuit has changed from the schematic you posted on Dec 27th:  there are polarity protection diodes for each input now.  But it looks like batt(-) erroneously goes to the barrel jack instead of ground.  Would you mind checking it?   Should I cut this trace and add a wire to ground?  Or is there a better method?

- Bruce

On Fri, May 17, 2019 at 6:30 PM Ashhar Farhan <farhanbox@...> wrote:
I am building up the info on hfsignals.com. there is a place holdrr page for it already.
- f

On Fri 17 May, 2019, 3:33 PM Jack Purdum via Groups.Io, <jjpurdum=yahoo.com@groups.io> wrote:
It's his spectrum analyzer. I don't understand what Curt's PO'ed about? He's free to attend FDIM.

Jack, W8TEE


On Friday, May 17, 2019, 1:22:01 PM EDT, Roy Appleton <twelveoclockhigh@...> wrote:


And what "unit" pray tell are we talking about here?

Roy
WA0YMH

On Thu, May 16, 2019, 9:12 PM David Wilcox via Groups.Io <Djwilcox01=yahoo.com@groups.io> wrote:
Farhan,

I heard your lecture at FDIM and purchased one of the units but need instruction in how to use it.  Github only has the upgraded code files.  Please advise.


Re: Antuino

Curt
 

Jack

No I was merely be philosophical and maybe slightly trivial. In spite of my call Dayton is about 10 hours away by car, but I should consider making the trip. Nice there are wares to consider,  perhaps a bunch of Jackals were sold. I honestly need bench time more than a trip.

Bruce may solve whatever it is rather soon. Sounds like a real nice instrument Farhan and his friends have provided. Safe travels everyone.

Curt


Re: wsprnet results, wsjt-x, and calibration success --> world domination V4 #calibration #firmware

Jeff Karpinski (N0KAI)
 

This is right where I'm at now. Sooooo many configuration tips and absolutely none of them are the same. I especially loved the one about setting BFO by tuning to static till it sounded "good". 🙄

Also took me a while to finally realize that even though the config menu options are the same using CEC firmware, they work NOTHING like the factory setup. Finding a partially written manual for CEC clued me in. Using WWV is a great idea, except I live a stones throw from it and WWV is very much NOT NVIS. Gave me an excuse to finally order a proper signal generator.


Re: wsprnet results, wsjt-x, and calibration success --> world domination V4 #calibration #firmware

Don - KM4UDX
 

There was so much trial, error, fumble, confusion and general stupidity in my process that it is a model of what not to do. 

I distill till the process:
1) express the 10mhz  freq error as a percent delta
2) apply that percent delta to the weird calibration number in memory manager, reboot
3) remeasure the error (a) if close enough to step 4, (b) if still to far off go to step 1
4) run WSJT-X freq calibration process and apply proposed adjustments
5) if your WSPRnet spots still work at all, consider yourself lucky, if you get lots more spots consider yourself very lucky.

This process took me hours and hours to develop and implement.  I recall reading about this exact process in one of my late night uBITX reading deep dives.  But I didn't just implement it. No, I had to invent it on my own at great expense.  

So as usual, I have discovered what others have known all along. 

Don
km4udx


Re: Antuino

Bruce Hall <bhall66@...>
 

Farhan,

I just saw your updated schematic on github.   Maybe the only issue is a faulty barrel connector.

- Bruce

On Fri, May 17, 2019 at 7:05 PM Bruce Hall via Groups.Io <bhall66=gmail.com@groups.io> wrote:
Farhan,

The unit I received at FDIM works fine with Vcc from the barrel jack, but not from the battery pack.   

Peeking at the PCB, the power circuit has changed from the schematic you posted on Dec 27th:  there are polarity protection diodes for each input now.  But it looks like batt(-) erroneously goes to the barrel jack instead of ground.  Would you mind checking it?   Should I cut this trace and add a wire to ground?  Or is there a better method?

- Bruce

On Fri, May 17, 2019 at 6:30 PM Ashhar Farhan <farhanbox@...> wrote:
I am building up the info on hfsignals.com. there is a place holdrr page for it already.
- f

On Fri 17 May, 2019, 3:33 PM Jack Purdum via Groups.Io, <jjpurdum=yahoo.com@groups.io> wrote:
It's his spectrum analyzer. I don't understand what Curt's PO'ed about? He's free to attend FDIM.

Jack, W8TEE


On Friday, May 17, 2019, 1:22:01 PM EDT, Roy Appleton <twelveoclockhigh@...> wrote:


And what "unit" pray tell are we talking about here?

Roy
WA0YMH

On Thu, May 16, 2019, 9:12 PM David Wilcox via Groups.Io <Djwilcox01=yahoo.com@groups.io> wrote:
Farhan,

I heard your lecture at FDIM and purchased one of the units but need instruction in how to use it.  Github only has the upgraded code files.  Please advise.


Re: Antuino

bhall66@...
 

Farhan,

The unit I received at FDIM works fine with Vcc from the barrel jack, but not from the battery pack.   

Peeking at the PCB, the power circuit has changed from the schematic you posted on Dec 27th:  there are polarity protection diodes for each input now.  But it looks like batt(-) erroneously goes to the barrel jack instead of ground.  Would you mind checking it?   Should I cut this trace and add a wire to ground?  Or is there a better method?

- Bruce

On Fri, May 17, 2019 at 6:30 PM Ashhar Farhan <farhanbox@...> wrote:
I am building up the info on hfsignals.com. there is a place holdrr page for it already.
- f

On Fri 17 May, 2019, 3:33 PM Jack Purdum via Groups.Io, <jjpurdum=yahoo.com@groups.io> wrote:
It's his spectrum analyzer. I don't understand what Curt's PO'ed about? He's free to attend FDIM.

Jack, W8TEE


On Friday, May 17, 2019, 1:22:01 PM EDT, Roy Appleton <twelveoclockhigh@...> wrote:


And what "unit" pray tell are we talking about here?

Roy
WA0YMH

On Thu, May 16, 2019, 9:12 PM David Wilcox via Groups.Io <Djwilcox01=yahoo.com@groups.io> wrote:
Farhan,

I heard your lecture at FDIM and purchased one of the units but need instruction in how to use it.  Github only has the upgraded code files.  Please advise.


Re: treble only SSB modulation

Vaughn
 

Hi, just to add my 2p worth. I had this problem and like above, used a dummy load and transmitted an LSB signal. This was received by another rig and showed the BFO was way off. 

I replace the SMD capacitor with a number of others in a number of values and parallels, but could not get the sound I was after. They were all too low or too high in pitch and often just unable to understand at all. Eventually I looked for another set of capacitors and found one from Rapid Electronics. variable 7pF to 50pF SMD. Fitted this and then adjusted it, a bit at a time. until I got the sound I wanted.

Thanks to all here for the help and discussions explaining the fix.

73s Vaughn

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