Date   
Re: What does zero-beat sound like? #ubitx

Ralph Mowery
 

The tuning is close for those that do not have test equipment.

What I usually do is set a sideband rig readout either 1000 hz higher or lower than the desired frequency depending on the sideband .  Then feed it a signal that is on frequency and put a counter on the speaker.  When the speaker output is 1000 hz, then the receiver is set.  No guessing about trying to hear the zero beat below around 100 hz or less.

While I bought used test equipment and do not have that much in it, here I set with a $ 120 rig and use about  $ 5000 worth of test equipment to set it with.
Would have been much less expensive to buy a transceiver already to go..But I would not have nearly as much fun working with this little rig. 

As I see it, Mr. Farhan did an excellent job of making an inexpensive rig for those that can not afford a more expensive rig, and for those of us that like to tinker with items that we do not have the skill or way to make the circuit boards and such from scratch. 
+
de ku4pt




On Thu, May 31, 2018 at 5:11 PM, Mike aka KC2WVB <rb5363@...> wrote:
OK, I thought about this can of worms I opened on the ride home. Given the stores are 60 miles from the mountain top home I am staying at this summer I had roughly 45 minutes to sort through the various responses.

First, we should agree that the metric that establishes the accuracy one is aiming for is wave  lenght. Wave length of course is the distance propagated in one complete cycle. So Jerry is correct in that if your aim is to set an oscillator at a set frequency then being off by as much as 300 hz when using  a 30 MHz signal as a reference is equivalent to being off by 10 hz when using a 1 Mhz signal as a  reference. This is due to 10 cycles at 1Mhz and 300 cycles at 30 Mhz, when viewed as occupying distance, are equal in lenght.

If I have bad hearing it is normally at the low or high end of the spectrum and what Jerry pointed out shows that I can still obtain the accuracy of someone with better hearing by using a higher frequency for a reference signal and if our hearing is equivalent then I simply obtain higher accuracy by using the higher frequency reference signal.

As the other gentleman pointed out being able to have accuracy that resolves to perfection is most likely not even possible because of capacitor issues that end up blocking or at least attenuating the lowest of the lows in terms of audio signals.

However, I do disagree with defining theoretical so as to indicate other than actual conditions for while the theoretical and actual may not coincide there are times that they do.

Thank you all for chipping in to this discussion brought on by my thinking out loud. Its been interesting.

_._,_._,_


Re: What does zero-beat sound like? #ubitx

Nikos SV1IYF
 

I tried the "official" calibration routine, but turned out to be VERY rough.

Two reasons for this:

a) Zero beating with loudspeaker or earphones requires that these two transducers can reproduce split-Hz tones, plus your ears can detect them.

b) The offered by the firmware calibration values are very wide.

 

What did I do after this:

1) Selected by ear two calibration values that sounded as the "best" pair in regards to zero beating.

2) Used them both and the WSJT-x software, in calibration mode, to find the two offsets (one positive the other negative if you have done a good zero beating job)

3) With the aid of the CEC manager, read the internal long calibration parameter for both cases.

4) Interpolated parameters of 3) with offsets from 2) and wrote (i.e. programmed) the new value a bit rounded, as it doesn't make any sense to seek more accuracy that the master clock's stability allows.

 

73 Nikos

Re: boosting the power on 28 MHz #ubitx

Joe Puma
 

What no 17 meters? I heard some signals the other day coming in and they may have been from Japan. I’m keeping an eye on 17 this summer. 15 meters too. 😉 I already looked Poland and Brazil on 15.

Joe
KD2NFC

On May 31, 2018, at 4:53 PM, Richard Spohn <wb2gxm@...> wrote:

It's all due to marketing! 10 meters is called the "Magic Band". And
everybody loves magic. - Rich WB2GXM

On 5/30/18, Bo Barry <@BoBarry> wrote:
I'm constantly surprised at the interest in 10 meters. I always check 15. If
its dead I go to 20. If it has anything on it I check 10 and hear nothing
here in NC with a simple EFHW..

But 10 was a blast back in 1954!! :)

73, Bo W4GHV since '54

Re: boosting the power on 28 MHz #ubitx

KENT HUFFORD <khufford@...>
 

Like Bob Heil said. If everybody TRANSMITTED on 10m, then you may hear someone. <sic>.

 

Kent

 

From: BITX20@groups.io <BITX20@groups.io> On Behalf Of atouk
Sent: Thursday, May 31, 2018 6:01 PM
To: BITX20@groups.io
Subject: Re: [BITX20] boosting the power on 28 MHz #ubitx

 

 

On 5/31/2018 4:53 PM, Richard Spohn wrote:

It's all due to marketing!  10 meters is called the "Magic Band".  And
everybody loves magic. - Rich WB2GXM
 
On 5/30/18, Bo Barry <bobarr@...> wrote:
I'm constantly surprised at the interest in 10 meters. I always check 15. If
its dead I go to 20. If it has anything on it I check 10 and hear nothing
here in NC with a simple EFHW..
 
But 10 was a blast back in 1954!!   :)
 
73, Bo W4GHV since '54
 
 
 
 

 

Re: boosting the power on 28 MHz #ubitx

atouk
 


On 5/31/2018 4:53 PM, Richard Spohn wrote:
It's all due to marketing!  10 meters is called the "Magic Band".  And
everybody loves magic. - Rich WB2GXM

On 5/30/18, Bo Barry <bobarr@...> wrote:
I'm constantly surprised at the interest in 10 meters. I always check 15. If
its dead I go to 20. If it has anything on it I check 10 and hear nothing
here in NC with a simple EFHW..

But 10 was a blast back in 1954!!   :)

73, Bo W4GHV since '54




Re: What does zero-beat sound like? #ubitx

Dexter N Muir
 

More from the thinkery, Mike:

TP20 should give a good meter point. There's a 0.1uF to earth there, but at low freq and Z its Z won't affect much.
..and theoretical, 'cos I don't actually have one: stalled with bitx-40 and horrific QRM at the QTH :( .

73
Dex, ZL2DEX

Re: Expert Advice Needed

Daniel Conklin <danconklin2@...>
 

The actual assembly is the same so just follow the wire up link at hfsignals. http://www.hfsignals.com/index.php/ubitx-wire-up/

Re: Need Clarification on uBitx v. 4 Schematic

Mike
 

Thanks for the replies . . . I figured they were meant to be options. May be better just to provide a text-box footnote in schematic.

I've made dozens of FT8 contacts with a scratch built ubitx(V3) using the 510's, typically 10W PEP,  minimal heatsink, no fan, no enclosure . . . . the 510's are actually quite rugged, stable, and predictable.

It's part of what makes it a fun build - they're cheap to replace when you drive them into oscillation and then *poof* !

Re: Expert Advice Needed

w7hd.rh <w7hd.rh@...>
 

My archived copy is here.   ubitx wiring

Ron W7HD

On 05/31/2018 12:50 PM, Kevin Timm wrote:
The archived assembly instructions are here:  http://www.hfsignals.com/index.php/ubitx-r3-archived/

I can't find any assembly instructions there

K5KDT
Kevin

-- 
Ron W7HD - NAQCC#7587 OMISS#9898 KX3#6966 LinuxUser#415320
Editor OVARC newsletter

Re: Nextion Display

W2CTX
 

Ian, correct me if I am wrong, is saying use the serial port to send FT-817 commands to control the uBITX.


rOn

On May 31, 2018 at 5:09 PM Joe <joeman2116@...> wrote:

This looks great to see progress for ubitx and nextion integration.

I am looking at purchasing:

Nextion Enhanced 3.2" HMI Touch display

Product Code : RB-Ite-174

Would this work ok for working with your development?

Thanks
Joe
VE1BWV

On Thu, May 31, 2018 at 1:33 PM, Ian Lee <kd8cec@...> wrote:
Nextion LCD User and all

I released the version (V1.080) and experimented with various things.
from the beginning of uBITX firmware development, there was a request support for Nextion LCD.
Since version V1.073, various LCD was supported (Except Nextion LCD)
Some users have sent related materials to Nextion LCD and I have purchased Nextion LCD.
I do not know how to use Nextion LCD well.

I have seen DMR Hotspot use Nextion LCD. I was surprised to see that users could easily implement their own UI programs on the Nextion LCD.
I can not use the Nextion LCD well but the interface with uBITX is implemented.
You do not need any hardware modifications to use the Nextion LCD.
Just remove the existing LCD and connect the Nextion LCD in place using 5 Lines. It looks like an I2C LCD.
Like the DMR Hot Spot, I think users will be able to pick and use the UI.

If you want UI programming on Nextion LCD, please send me mail (with your mail address)
also Please email me if you can beta test my protocol or 2.4 "LCD.
I will send you a code to test Nextion LCD with uBITX and template code for Nextion LCD UI Designer.
I am making a UI suitable for 2.4 "LCD based on Template. It's a $ 17 LCD that I bought from Aliexpress, but it's still good.

Ian KD8CEC




2018-05-22 23:00 GMT+09:00 Allen Merrell via Groups.Io <kn4ud@...>:
I am interested in this too. I have not received  my ubitx yet but have been playing around with the Arduino and stm. I've  not had much luck with stm  f303k8  nucleo , mostly because like it has been mentioned library  issues  I have not tried  the  blue pill or the f4 boards I have.
--
73's  kn4ud
Allen  Merrell

 

 


--
Best 73
KD8CEC / Ph.D ian lee
kd8cec@...
www.hamskey.com (my blog)

 

 


Re: uBitx sound

Tom Cooper
 

I put a 10 mF cap across C51, which is 1 mF.  To me, it sounds better on SSB.

Re: What does zero-beat sound like? #ubitx

Mike aka KC2WVB <rb5363@...>
 

OK, I thought about this can of worms I opened on the ride home. Given the stores are 60 miles from the mountain top home I am staying at this summer I had roughly 45 minutes to sort through the various responses.

First, we should agree that the metric that establishes the accuracy one is aiming for is wave  lenght. Wave length of course is the distance propagated in one complete cycle. So Jerry is correct in that if your aim is to set an oscillator at a set frequency then being off by as much as 300 hz when using  a 30 MHz signal as a reference is equivalent to being off by 10 hz when using a 1 Mhz signal as a  reference. This is due to 10 cycles at 1Mhz and 300 cycles at 30 Mhz, when viewed as occupying distance, are equal in lenght.

If I have bad hearing it is normally at the low or high end of the spectrum and what Jerry pointed out shows that I can still obtain the accuracy of someone with better hearing by using a higher frequency for a reference signal and if our hearing is equivalent then I simply obtain higher accuracy by using the higher frequency reference signal.

As the other gentleman pointed out being able to have accuracy that resolves to perfection is most likely not even possible because of capacitor issues that end up blocking or at least attenuating the lowest of the lows in terms of audio signals.

However, I do disagree with defining theoretical so as to indicate other than actual conditions for while the theoretical and actual may not coincide there are times that they do.

Thank you all for chipping in to this discussion brought on by my thinking out loud. Its been interesting.

On Thu, May 31, 2018, 4:55 PM Dexter N Muir <dexy@...> wrote:

I'm wondering if a multimeter on the (non-decoupled) audio might show it better. Measure AC, then DC. AC will register level down to say 10, maybe 5Hz, and DC (particularly analog-needle) will show variation by swing down to 0.1Hz  (10 seconds per swing).
Disclaimer: untried, but 'worth a crack, Nigel'? Purely theoretical, where would that be best measured?
73
Dex, ZL2DEX

Re: Nextion Display

Joe
 

This looks great to see progress for ubitx and nextion integration.

I am looking at purchasing:

Nextion Enhanced 3.2" HMI Touch display

Product Code : RB-Ite-174

Would this work ok for working with your development?

Thanks
Joe
VE1BWV

On Thu, May 31, 2018 at 1:33 PM, Ian Lee <kd8cec@...> wrote:
Nextion LCD User and all

I released the version (V1.080) and experimented with various things.
from the beginning of uBITX firmware development, there was a request support for Nextion LCD.
Since version V1.073, various LCD was supported (Except Nextion LCD)
Some users have sent related materials to Nextion LCD and I have purchased Nextion LCD.
I do not know how to use Nextion LCD well.

I have seen DMR Hotspot use Nextion LCD. I was surprised to see that users could easily implement their own UI programs on the Nextion LCD.
I can not use the Nextion LCD well but the interface with uBITX is implemented.
You do not need any hardware modifications to use the Nextion LCD.
Just remove the existing LCD and connect the Nextion LCD in place using 5 Lines. It looks like an I2C LCD.
Like the DMR Hot Spot, I think users will be able to pick and use the UI.

If you want UI programming on Nextion LCD, please send me mail (with your mail address)
also Please email me if you can beta test my protocol or 2.4 "LCD.
I will send you a code to test Nextion LCD with uBITX and template code for Nextion LCD UI Designer.
I am making a UI suitable for 2.4 "LCD based on Template. It's a $ 17 LCD that I bought from Aliexpress, but it's still good.

Ian KD8CEC




2018-05-22 23:00 GMT+09:00 Allen Merrell via Groups.Io <kn4ud@...>:
I am interested in this too. I have not received  my ubitx yet but have been playing around with the Arduino and stm. I've  not had much luck with stm  f303k8  nucleo , mostly because like it has been mentioned library  issues  I have not tried  the  blue pill or the f4 boards I have.
--
73's  kn4ud
Allen  Merrell



--
Best 73
KD8CEC / Ph.D ian lee
kd8cec@...
www.hamskey.com (my blog)


Re: What does zero-beat sound like? #ubitx

Dexter N Muir
 

I'm wondering if a multimeter on the (non-decoupled) audio might show it better. Measure AC, then DC. AC will register level down to say 10, maybe 5Hz, and DC (particularly analog-needle) will show variation by swing down to 0.1Hz  (10 seconds per swing).
Disclaimer: untried, but 'worth a crack, Nigel'? Purely theoretical, where would that be best measured?
73
Dex, ZL2DEX

Re: boosting the power on 28 MHz #ubitx

Richard Spohn
 

It's all due to marketing! 10 meters is called the "Magic Band". And
everybody loves magic. - Rich WB2GXM

On 5/30/18, Bo Barry <@BoBarry> wrote:
I'm constantly surprised at the interest in 10 meters. I always check 15. If
its dead I go to 20. If it has anything on it I check 10 and hear nothing
here in NC with a simple EFHW..

But 10 was a blast back in 1954!!   :)

73, Bo W4GHV since '54

Re: uBitx sound

iz oos
 

I like as mine came from the factory. Indeed it has no basses. Also the tx audio sounds the same. In my unit frequencies below 700hz are cut down. Above 2.8khz are also cut. The filter seems to me quite effective. I could adjust the bfo to have more basses and less high. But I prefer like it is now also because the opposite sideband is really suppressed and the carrier attenuated. I see this as I always monitor my tx audio with an external sdr receiver. We can have a sked on the bands if you like if this would help.


Il 31/mag/2018 19:19, <aronax37@...> ha scritto:
The sound from my uBitx has no bass. It sounds like an ancient mini-transistor radio receiver. Is the speaker from the Inkits case so bad?  My Youkits HB-1B on the same frequency and small external speaker sounds much better. Inkits case is relatively big, sound should by far better I think.
Ivo,OK2SHI

Re: Expert Advice Needed

Ralph Mowery
 

To learn about the software you may want to get one of the nano processors and a display, and maybe one of the rotary encoders.  They are not very expensive, only about 2 or 3 dollars shipped from China.  You can hook them together and play with the software and see how to load and modify it without things being hooked to the uBITX.  

Lots of things on youtube about the nano and uno processors.They use the same processor, just different board layouts for the most part.


de ku4pt


On Thu, May 31, 2018 at 1:50 PM, <hotrod541@...> wrote:
I will be starting to assemble my uBITX after the case is delivered on 6/1.  I received the uBITX on 4/18 and have been waiting for the case to delivered from India. The board I received is marked N97014, 2/18, V3(c).  I need to know what upgrades wil be best to install now.  Please advise if there are any errors that need to be addressed at this time.  I would like to know if anyone is using the CCI EB63A amp.  Please let me know if the online assembly manual can be trusted to be correct.  I also need advice about installing the firmware, not real up to speed on this. This build will be a learning experience on the software side. Is there a good book that would be recommended as a learning tool for the Raduino firmware. I will be using this radio primarily on 40-80 meters at this time. Any and all advise will be greatly appreciated.
Thanks, buddy3223
KJ4ZSI


Re: Expert Advice Needed

Kevin Timm
 

The archived assembly instructions are here:  http://www.hfsignals.com/index.php/ubitx-r3-archived/

I can't find any assembly instructions there

K5KDT
Kevin

Re: Expert Advice Needed

Jerry Gaffke
 

Most of the talk here about mods has been with regard to getting more power out on the upper bands,
Works, but only a watt or so on 10m.
If your interest is 80m and 40m,  you can ignore all that fuss.

Get it going with no mods initially.
Should do fine on the air as is.

Jerry


On Thu, May 31, 2018 at 11:19 am, Daniel Conklin wrote:
The archived assembly instructions are here:  http://www.hfsignals.com/index.php/ubitx-r3-archived/
They were updated and should be accurate.  The only issue you may have that you should take care of is the audio amp chip.  If it has the WX on it then I recommend replacing it with a socket, or just solder a 6-8 volt regulator in the +12v line on the bottom of the board.  The instructions for that are here: https://groups.io/g/BITX20/message/44125?p=,,,20,0,0,0::Created,,regulator+WX,20,2,0,14340543
That worked well for me.  Don't worry about any firmware changes or calibration changes until you have assembled it and used it a bit.  Also, check out ubitx.net for news and information.
Daniel, W2DLC

Re: Expert Advice Needed

Daniel Conklin <danconklin2@...>
 

The archived assembly instructions are here:  http://www.hfsignals.com/index.php/ubitx-r3-archived/
They were updated and should be accurate.  The only issue you may have that you should take care of is the audio amp chip.  If it has the WX on it then I recommend replacing it with a socket, or just solder a 6-8 volt regulator in the +12v line on the bottom of the board.  The instructions for that are here: https://groups.io/g/BITX20/message/44125?p=,,,20,0,0,0::Created,,regulator+WX,20,2,0,14340543
That worked well for me.  Don't worry about any firmware changes or calibration changes until you have assembled it and used it a bit.  Also, check out ubitx.net for news and information.
Daniel, W2DLC