Date   
Re: Gordon Gibby Digital Interface

Sascha Bohnet | DL5SMB
 

Sorry for always replying so late - it's not so easy for me to free up some time for the hobby.

I have changed the resistors now (10k in the TX path) and also installed some 3,5mm output jackets to be able to also use an external sound card:

TX seems to work now with my cheap 3 € soundcard , I can send out signals and I am getting heard on WSPR. Problem is that with this sound card I can't receive WSPR signals - nothing gets decoded,
though the signal seems okay in level and on the waterfall.

With an external 10 € sound card I am able to decode WSPR signals, but I can't send. The audio level is just not high enough. I changed the vox resistor to 1 k which enabled RX-TX switching,
and changed the TX-resistor to 1k - but I still get only 5W instead of 10. I guess I should not go lower. Its loug enough when i use headphones.. I still need to investigate a little.

Re: Testing Crystal Filters maximum dbm

 

Current one too!

Just connect a short cable between in and out and check reading on SNA mode. It should
read -20dbm. If not change R20 to suit.

Raj

At 23-10-19, you wrote:
Raj,

Are the production Antuinos affected or is it just the early ones sold at Hamvention?

73, Mike KK7ER

Re: 2.8 nextion screen

Maurice Bersan
 

Thanks for tips. One nextion coming up.

Re: Testing Crystal Filters maximum dbm

Mike KK7ER
 

Raj, 

Are the production Antuinos affected or is it just the early ones sold at Hamvention?

73, Mike KK7ER 

JackAl - Teensy Audio - switch inputs? #ubitx #jackal

Rob French (KC4UPR)
 

Quick question on the JackAl board, mainly because I'm doing something with Teensy and the audio board too...

Does the JackAl board switch the inputs on the Teensy when going between Transmit and Receive?  I.e. in the Teensy software, does it change the audio board (SGTL5000) input from LINE_IN to MIC_IN when it switches to transmit, and then back to LINE_IN when it goes to receive?  Looking at the schematic, I think it's implying that, but I'm not positive.

Why I ask:  in my project, I'm using L channel for Rx audio processing and R channel for Tx audio processing.  LINE_IN and LINE_OUT.  But, I had thought about using MIC_IN for the electret mic input, and LINE_IN otherwise.  I also thought this might allow me to use some of the Audio Board's built-in DSP processing (e.g. auto-volume, equalizer), rather than doing all of the DSP in the Teensy.  But I wasn't sure if it could switch inputs quickly enough?

Thanks!
-Rob

Re: µBITX : Try starting to build a new kit .....

HB9FIH
 

 

All ok so far Jean, let's wait and then build...I will then write about my progress.

Btw about Multiband ... just had my first QSO on 60m from TA3 to S57.. - with the QCX 40m !!!! - makes 3 Watts on the ZS6BKW Antenna (with SG239 Tuner).

---
..................
vy 73 Erich Rieder
HB9FIH
HS0ZLS

Webseite ist NEU unter: http://www.hb9fih.org

 

Am 2019-10-22 21:55, schrieb Behiels Jean-Pierre:

Evening Erich;

 

Thanks again for your kindly help instructions.

I was waiting for the multiband QCX but he is announced very early this year,but I wait and wait a long time nothing till today ??

I do have a lot of info now Erich.

I think I have enough to start with !!

Beginning like you say by building the standard µBITX himself and get him running hi ......

I can suggest you one big nice subject concerning a CW keyer addition,built the example from K3NG : https://github.com/k3ng/k3ng_cw_keyer

A great keyer with a lot of functions on it and easy and small addition to built.

I do have one built hier on the desk,witch I use with my other transceivers for keying them ....

I will sure follow your instructions to start with ...

This is also a nice building kit but despite of all only for 3 hambands : http://www.kn-electronic.de/Bausaetze/QRP-99V.html

For that particular reason I choose for building the multiband µBITX !!!

 

 

With kindly regards Jean ON4AEF.

 

 

E-mail : ON4AEF@...

 

 

 

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of HB9FIH
Sent: maandag 21 oktober 2019 21:46
To: BITX20@groups.io
Subject: Re: [BITX20] µBITX : Try starting to build a new kit .....

 

 

OK Jean


I found most Infos here:

Thats the creator of the CEC firmware 
This Firmware has build in the support for the Nextion Displays and further supports the S-Meter.
The AGC from kit-projects.com can be connected direct to the Nextion without any more Hardware.
They write in the instruction (this you can only see this in your Downloads if you bought this product):
"S-Meter Tap
Last but not least is the S-meter. The tap has been tested and setup for the CEC firmware via the A7
pin. If you would like to use a external S-meter some form of calibration circuit will be needed.
This has also been tested and working with the TSW BITeensio via Pin A19 "

The Nextion Screen It was hard to find....at least I found them in Amazoon from a seller in UK.
- I choosed the 2.8" because its sure this works, 2. Its enough big otherwise the TX becomes big. (the Yaesu FT-991 has also not a bigger one)

 

The Audio Filter are Universal or CW (you must choose by order). The Universal is more wide. If you alsi work SSB better the universal, if you work more CW the the CW. The CW has 2 LED 1. matching the 700Hz and 2. Overload.

Assembling:
I also make the plan:
1. uBITX must run perfect in Original Edition
then:

3. Load the CEC Fimware (CEC ist the Firmware from KD9CEC (www.hamskey.com - see above)
(the CEC Firmware runs also with the Original Display 16x2) - this firmware replaces the Original.
4. apply the Nextion Display

Additional I will do:
- An additional Audio output (3.5mm Audio) for connection to a PC for eg FLGigi etc for a Waterfall
This I connect by the Otuput of AGC (its the High connection for the Volume potentiometer- - the AGC pulls down this point if the sigs are too loud - so I also have no overload in the Waterfall on PC)
- Pressing the VFO/Tuning is the Button for reching the menue. I will make an additional Button for this. Because if you press the VFO-Knob maybe you turn a bit on the VFO for Frequency.
- if the build in Keyer is not so comfortable to handle then I build a keyer with the IC K16 IC  https://hamcrafters2.com/K16IC.html  ( I already made abt 5 pcs.. works perfect)
(make then 5 Buttons 1/M 2 3 4 for Menu and Messages and a button direct for tuning (if you have eg an automatic antenna tuner) 
 

I know - at beginning you know nothing but you have to know all - later you know all but deep knowledge is no more necessary.
 

The case I made a bit bigger as necessary (Its now like an A4 paper). I have space to build in additional modules.
eg an Audio amplifier and a speaker.

 

I have now time to plan and organize all this things (I hope perfect) here from TA3  - because all must be ready when I travel back for 1 week to HB9. After 1 week in HB9 travelling continous to EA8 - and there I assemble the uBITX. So I must have all parts ready to take with me.

 

OK Jean hope this helps ... feel free to contact me - 

 

73 Erich

 

btw: also own 4 QCX from Hans.... Now I am planning to visit him in TA4 Dalyan its abt 350 km from here TA3 Ayvalik.

---

..................
vy 73 Erich Rieder
HB9FIH
HS0ZLS

Webseite ist NEU unter: http://www.hb9fih.org

 

Am 2019-10-21 21:38, schrieb Behiels Jean-Pierre:

Evening Erich,

 

First of all my big thanks for your first help and info's around the µBITX subject.

The info about the NIXTION screens I could not direct find on HF signals,was this,or is this a available kit to order ?

All other things you presume I do have found.

I like to obtain a µBITX with a TFT screen on it,with all this nice information on it like S-meter and signal bandscope and so on ..

I do have to change from standard µBITX software to another version to obtain those features I understood well ?

I do have to find a lot and to read before I can start.

But I already can start to buy the Standard µBITX kit from Fahran on www.hfsignals.com

Despite I do have receive poor respons from other builders concerning my question and E-mail,about starting with this nice project..

I hope I can finish it all in good order ...

I just have found this website where is a lot on : http://ubitx.net/

I hope this will help me further on the way to start build the kit...

 

 

With kindly regards Jean ON4AEF.

 

 

E-mail : ON4AEF@...

 

 

 

 

 

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of HB9FIH
Sent: maandag 21 oktober 2019 13:14
To: BITX20@groups.io
Subject: Re: [BITX20] µBITX : Try starting to build a new kit .....

 

Bonjour Jean-Pierre

I am (was) in same progress / state for decisions. But now I have ordered all parts for me.

- AGC - bestellt (from kit-projects.com)
- CW Filter (300/1000Hz) - bestellt (from SOTABEAMS)

- Touch Display 2.8" - bestellt - (from hf-signals)
- ALU Case - the Parts from a manufacturer in Germany

Here in my blog I write all about my uBITX build: http://www.hb9fih.org/?p=p_629&sName=ubitx-2019

I am still in TA3 - mid of November all parts should be arrive (some are already arrived) in HB9.

I will start in December in my QTH on EA8 to build them up.

Erich

 

 

Virusvrij. www.avast.com

 

Re: 2.8 nextion screen

Murray Wills (ZL2IQ)
 

AliExpress for my 5 inch screen.
73 Murray ZL2IQ




From: BITX20@groups.io <BITX20@groups.io> on behalf of Maurice Bersan via Groups.Io <Vk6hly@...>
Sent: Wednesday, October 23, 2019 2:03:19 AM
To: BITX20@groups.io <BITX20@groups.io>
Subject: [BITX20] 2.8 nextion screen
 
So where is everyone getting their 2.8 nextion screens from? I just pulled the trigger on a ubitx case that has 1602 or 2.8  nextion options.
Thanks for any recomendations

µBITX : Try starting to build a new kit .....

Behiels Jean-Pierre
 

Evening Erich;

 

Thanks again for your kindly help instructions.

I was waiting for the multiband QCX but he is announced very early this year,but I wait and wait a long time nothing till today ??

I do have a lot of info now Erich.

I think I have enough to start with !!

Beginning like you say by building the standard µBITX himself and get him running hi ……

I can suggest you one big nice subject concerning a CW keyer addition,built the example from K3NG : https://github.com/k3ng/k3ng_cw_keyer

A great keyer with a lot of functions on it and easy and small addition to built.

I do have one built hier on the desk,witch I use with my other transceivers for keying them ….

I will sure follow your instructions to start with …

This is also a nice building kit but despite of all only for 3 hambands : http://www.kn-electronic.de/Bausaetze/QRP-99V.html

For that particular reason I choose for building the multiband µBITX !!!

 

 

With kindly regards Jean ON4AEF.

 

 

E-mail : ON4AEF@...

 

 

 

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of HB9FIH
Sent: maandag 21 oktober 2019 21:46
To: BITX20@groups.io
Subject: Re: [BITX20] µBITX : Try starting to build a new kit .....

 

 

OK Jean


I found most Infos here:

Thats the creator of the CEC firmware 
This Firmware has build in the support for the Nextion Displays and further supports the S-Meter.
The AGC from kit-projects.com can be connected direct to the Nextion without any more Hardware.
They write in the instruction (this you can only see this in your Downloads if you bought this product):
"S-Meter Tap
Last but not least is the S-meter. The tap has been tested and setup for the CEC firmware via the A7
pin. If you would like to use a external S-meter some form of calibration circuit will be needed.
This has also been tested and working with the TSW BITeensio via Pin A19 "

The Nextion Screen It was hard to find....at least I found them in Amazoon from a seller in UK.
- I choosed the 2.8" because its sure this works, 2. Its enough big otherwise the TX becomes big. (the Yaesu FT-991 has also not a bigger one)

 

The Audio Filter are Universal or CW (you must choose by order). The Universal is more wide. If you alsi work SSB better the universal, if you work more CW the the CW. The CW has 2 LED 1. matching the 700Hz and 2. Overload.

Assembling:
I also make the plan:
1. uBITX must run perfect in Original Edition
then:

3. Load the CEC Fimware (CEC ist the Firmware from KD9CEC (www.hamskey.com - see above)
(the CEC Firmware runs also with the Original Display 16x2) - this firmware replaces the Original.
4. apply the Nextion Display

Additional I will do:
- An additional Audio output (3.5mm Audio) for connection to a PC for eg FLGigi etc for a Waterfall
This I connect by the Otuput of AGC (its the High connection for the Volume potentiometer- - the AGC pulls down this point if the sigs are too loud - so I also have no overload in the Waterfall on PC)
- Pressing the VFO/Tuning is the Button for reching the menue. I will make an additional Button for this. Because if you press the VFO-Knob maybe you turn a bit on the VFO for Frequency.
- if the build in Keyer is not so comfortable to handle then I build a keyer with the IC K16 IC  https://hamcrafters2.com/K16IC.html  ( I already made abt 5 pcs.. works perfect)
(make then 5 Buttons 1/M 2 3 4 for Menu and Messages and a button direct for tuning (if you have eg an automatic antenna tuner) 
 

I know - at beginning you know nothing but you have to know all - later you know all but deep knowledge is no more necessary.
 

The case I made a bit bigger as necessary (Its now like an A4 paper). I have space to build in additional modules.
eg an Audio amplifier and a speaker.

 

I have now time to plan and organize all this things (I hope perfect) here from TA3  - because all must be ready when I travel back for 1 week to HB9. After 1 week in HB9 travelling continous to EA8 - and there I assemble the uBITX. So I must have all parts ready to take with me.

 

OK Jean hope this helps ... feel free to contact me - 

 

73 Erich

 

btw: also own 4 QCX from Hans.... Now I am planning to visit him in TA4 Dalyan its abt 350 km from here TA3 Ayvalik.

---

..................
vy 73 Erich Rieder
HB9FIH
HS0ZLS

Webseite ist NEU unter: http://www.hb9fih.org

 

Am 2019-10-21 21:38, schrieb Behiels Jean-Pierre:

Evening Erich,

 

First of all my big thanks for your first help and info's around the µBITX subject.

The info about the NIXTION screens I could not direct find on HF signals,was this,or is this a available kit to order ?

All other things you presume I do have found.

I like to obtain a µBITX with a TFT screen on it,with all this nice information on it like S-meter and signal bandscope and so on ..

I do have to change from standard µBITX software to another version to obtain those features I understood well ?

I do have to find a lot and to read before I can start.

But I already can start to buy the Standard µBITX kit from Fahran on www.hfsignals.com

Despite I do have receive poor respons from other builders concerning my question and E-mail,about starting with this nice project..

I hope I can finish it all in good order ...

I just have found this website where is a lot on : http://ubitx.net/

I hope this will help me further on the way to start build the kit...

 

 

With kindly regards Jean ON4AEF.

 

 

E-mail : ON4AEF@...

 

 

 

 

 

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of HB9FIH
Sent: maandag 21 oktober 2019 13:14
To: BITX20@groups.io
Subject: Re: [BITX20] µBITX : Try starting to build a new kit .....

 

Bonjour Jean-Pierre

I am (was) in same progress / state for decisions. But now I have ordered all parts for me.

- AGC - bestellt (from kit-projects.com)
- CW Filter (300/1000Hz) - bestellt (from SOTABEAMS)

- Touch Display 2.8" - bestellt - (from hf-signals)
- ALU Case - the Parts from a manufacturer in Germany

Here in my blog I write all about my uBITX build: http://www.hb9fih.org/?p=p_629&sName=ubitx-2019

I am still in TA3 - mid of November all parts should be arrive (some are already arrived) in HB9.

I will start in December in my QTH on EA8 to build them up.

Erich

 

 

Virusvrij. www.avast.com

Re: P3 and CW-2

F5NPV
 

Hello,

2 main purpose:
-add a CW filter between P3 and CW2
-P3 For RTL SDR

i am using P3 For my RTL SDR (45Mhz IF)

73's F5NPV Didier

Re: Attach G4HUP buffer to underside of uBITX PCB? #ubitx #sdr

Joe Puma
 

I have a G4HUP for my yaesu ft840 and took those precautions but I just tapped IF from the top side without issue on my uBitx.  I think I have a cap in place but tried resistors and I’ve noticed a drop in receive with it and also with a straight tap. 

 


Joe
kd2nfc

P3 and CW-2

frd_pace@...
 

What is the purpose of the two unused 2 pin solder connections on the V5 board namely P3 and CW-2, an explanation will be greatly appreciated

Re: 2.8 nextion screen

HB9FIH
 

I found an got them from here:
https://www.amazon.de/dp/B008RU8WAK/ref=pe_3044161_189395811_TE_SCE_dp_1
already arrived at my post office.

Erich

2.8 nextion screen

Maurice Bersan
 

So where is everyone getting their 2.8 nextion screens from? I just pulled the trigger on a ubitx case that has 1602 or 2.8  nextion options.
Thanks for any recomendations

Re: Testing Crystal Filters maximum dbm

 

I forgot to mention the SNA out is square wave.


At 22-10-19, you wrote:
Iz,

The antuino is designed to output -20dbm at SNA port but a lot of them have escaped the plant
at -10db and -10dbm saturates the AD8307 and flatten the peaks. Change R20 to 1.2K and the
in/out short show display -20dbm on the display.

Raj

At 21-10-19, you wrote:

I am a proud owner of Antuino. I think it delivers around +10dbm in SNA plot function (correct me if I am wrong) at the RF out and at RF in on SWR plot function. Even if it shows - 20db on the plot. I have seen specs of crystal filters suggesting a maximum level of - 10dbm. So around 20db attenuator should be carefully added between the the Antuino and the crystal filter. Is this correct? I have seen however a datasheet of a crystal filter saying -10dbm max, however +16dbm for less than 10 seconds. So I am a bit confused on how to test safely crystal filters with an antenna analyzer or Antuino.

Re: Testing Crystal Filters maximum dbm

 

Iz,

The antuino is designed to output -20dbm at SNA port but a lot of them have escaped the plant
at -10db and -10dbm saturates the AD8307 and flatten the peaks. Change R20 to 1.2K and the
in/out short show display -20dbm on the display.

Raj


At 21-10-19, you wrote:

I am a proud owner of Antuino. I think it delivers around +10dbm in SNA plot function (correct me if I am wrong) at the RF out and at RF in on SWR plot function. Even if it shows - 20db on the plot. I have seen specs of crystal filters suggesting a maximum level of - 10dbm. So around 20db attenuator should be carefully added between the the Antuino and the crystal filter. Is this correct? I have seen however a datasheet of a crystal filter saying -10dbm max, however +16dbm for less than 10 seconds. So I am a bit confused on how to test safely crystal filters with an antenna analyzer or Antuino.

Re: Testing Crystal Filters maximum dbm

Balasubramanyan Cp
 

😀😀😀   😁😀😁😊😀😁😊😀😁😊   

On Mon, Oct 21, 2019 at 6:21 PM iz oos <and2oosiz2@...> wrote:

I am a proud owner of Antuino. I think it delivers around +10dbm in SNA plot function (correct me if I am wrong) at the RF out and at RF in on SWR plot function. Even if it shows - 20db on the plot. I have seen specs of crystal filters suggesting a maximum level of - 10dbm. So around 20db attenuator should be carefully added between the the Antuino and the crystal filter. Is this correct? I have seen however a datasheet of a crystal filter saying -10dbm max, however +16dbm for less than 10 seconds. So I am a bit confused on how to test safely crystal filters with an antenna analyzer or Antuino.

Re: Testing Crystal Filters maximum dbm

iz oos
 

I would add the same question for ceramic filters and resonators.


Il 22/ott/2019 11:21, "iz oos via Groups.Io" <and2oosiz2=gmail.com@groups.io> ha scritto:

Great advices and explanation Allison! What about testing SAW filters, is there a so stringent limit to - 10dbm (like crystal filters) to test them safely?


Il 21/ott/2019 18:17, "ajparent1/KB1GMX" <kb1gmx@...> ha scritto:
Iz,

think about that.... 
-10dbm is about .1milliwatt,  +16dbm is 40milliwatts or about 400 times greater power.

Crystal filter and crystals in singular use generally have a max power of about
1mW (0dbm) for most while some of the older slab rocks in FT243 cases could
take much more.

Why the limit, two things its mechanical vibration and the consequence is heat.
Too much heat and crystals crack or lead bonds fail.

I have swept filters and generally I use -10dbm for safety. Since the average filter is 
about 3-8db loss that is more than enough drive to see a signal on the other side.
So a source side 20db attenuator is pretty much required.  Also the source
impedance is then solidly known making it easier to add the needed transformer
or network to match the input of the filter.  You will likely have to have the same
network to match the detector side as well.

Allison

Re: Testing Crystal Filters maximum dbm

iz oos
 

Great advices and explanation Allison! What about testing SAW filters, is there a so stringent limit to - 10dbm (like crystal filters) to test them safely?


Il 21/ott/2019 18:17, "ajparent1/KB1GMX" <kb1gmx@...> ha scritto:
Iz,

think about that.... 
-10dbm is about .1milliwatt,  +16dbm is 40milliwatts or about 400 times greater power.

Crystal filter and crystals in singular use generally have a max power of about
1mW (0dbm) for most while some of the older slab rocks in FT243 cases could
take much more.

Why the limit, two things its mechanical vibration and the consequence is heat.
Too much heat and crystals crack or lead bonds fail.

I have swept filters and generally I use -10dbm for safety. Since the average filter is 
about 3-8db loss that is more than enough drive to see a signal on the other side.
So a source side 20db attenuator is pretty much required.  Also the source
impedance is then solidly known making it easier to add the needed transformer
or network to match the input of the filter.  You will likely have to have the same
network to match the detector side as well.

Allison

Re: kit-projects.com ND6T AGC - how to verify / S-meter settings / RF gain control #ubitx

 

Rob,

 Yes it must be on to get a S-meter reading.

73
--
David

 N8DAH
Kit-Projects.com

Shop is open!

Re: kit-projects.com ND6T AGC - how to verify / S-meter settings / RF gain control #ubitx

Rob French (KC4UPR)
 

Curt and Phillip, thanks for the replies.  I think maybe I just didn't have enough strong signals around.  I was using it today, and the AGC definitely had an effect, and I could definitely see a difference when I turned it off.

This may be a dumb question, but is it normal that I would not get S-meter readings when AGC is off?  (using the S-meter tap on the ND6T AGC board)