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

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: uBITX v5.1 and uBITX_Manager_V1.11 problem

pd0zz@...
 


Thanks for this info!
It works now with the CEC 1.20 software... Next step AGC...  and nexion 3.2 or somewhat bigger... and CAT-control... perhaps an arduino powered tuner..
Ohw, wait, what about portability? A 4S lifepo battery seems more adequate.


Op 18-10-2019 om 12:01 schreef Herman Scheper:

At home now.

 

Look in next link. With this information it works for me……

 

http://www.hamskey.com/2018/01/how-to-upgrade-ubitx-firmware.html

 

 

 

Hart.groet,  Herman Scheper PA0BAB

 

Van: BITX20@groups.io <BITX20@groups.io> Namens Herman Scheper
Verzonden: donderdag 17 oktober 2019 23:05
Aan: BITX20@groups.io
Onderwerp: Re: [BITX20] uBITX v5.1 and uBITX_Manager_V1.11 problem

 

First you have to use Xloader software to programm the Arduino nano with the CEC hex file you need. You can find it on the hamskey.com website. I am now on the wrong place to inform you better. It take me a week before i get it running on my ubitx v5. Before have Xloader working take a day for me as Arduino nano rookie.  I printed a lot of information all coming from the Hamskey site.  Veel succes van PA0BAB

Herman vanaf z'n IPad.


Op 17 okt. 2019 om 22:23 heeft pd0zz@... het volgende geschreven:

Hello, the arduino nano in my newly installed uBITX V5.1 is unreacheble from the program uBITX_Manager_V1.11.
I wanted to install uBITX_CEC_V1.200, but alas, as rookie I can't get it working.
The problem is that uBITX-Manager cannot contact the arduino, even after checking portsettings in win10.
Tell me what to do?
Thanks, Martin

 

Virusvrij. www.avast.com

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

ajparent1/KB1GMX <kb1gmx@...>
 

That would seem a reasonable way to proceed.
there is a larger area of copper under the board
that is mostly ground (circuit common).

Ideally a wire under 1cm is a good thing but in
general shorter is better and in general a solid
short ground from the buffer to the ubitx board
is desired as well.

Allison

Re: LM324 AGC Issue

ajparent1/KB1GMX <kb1gmx@...>
 

One further issue is to insure the wire from the base of
Q10 on the ubitx to the AGC board is very short!  It
has RF on it and a long wire will impact stability
and possibly introduce noises.

Better way to attach to base of Q10 is through a small resistor
of 100 ohms to reduce the amount of RF on the wire.

Allison

Re: Testing Crystal Filters maximum dbm

ajparent1/KB1GMX <kb1gmx@...>
 

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: LM324 AGC Issue

Neil Tolman
 

Thank You!
Neil
K1NBT

On Monday, October 21, 2019, 10:19:25 AM EDT, Joel Caulkins/N6ALT <caulktel@...> wrote:


Here you go.

Joel
N6ALT

Re: Gordon Gibby Digital Interface

 

I did include a few 4.7k's with each kit for people to play with to help with changes.
--
David

 N8DAH
Kit-Projects.com

Shop is open!

Testing Crystal Filters maximum dbm

iz oos
 

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: LM324 AGC Issue

Joe Puma
 

You have to calibrate the POTs on the top row. It’s in the notes of the build and calibration. If you did that step then something is wrong. If I recall the second pot on the top of board from the left adjusts the voltage for the LM chip. The 4v is desired voltage to power LM chip.  

Joe
KD2NFC


On Oct 21, 2019, at 10:14 AM, Joel Caulkins/N6ALT <caulktel@...> wrote:

Here you go.

Joel
N6ALT
<AGC Details.pdf>
<AGC Details.pdf>

Re: LM324 AGC Issue

 

Sorry for the duplicate attachments, they are identical.

Joel

Re: LM324 AGC Issue

 

Here you go.

Joel
N6ALT

Re: Spice software

Selwyn Warren
 

Thanks for that information about Microcap.

Sel Warren
AE5VC

On Mon, Oct 21, 2019 at 8:51 AM Vince Vielhaber <vev@...> wrote:

The author of Microcap is retiring and made the software free.  It used
to be $4500/seat.  Versions 10, 11 and 12 (12 is the latest) are now free.

http://www.spectrum-soft.com/download/download.shtm

Vince.
--
   K8ZW  http://www.metalworkingfun.com   http://www.hamradio.fun



Spice software

Vince Vielhaber
 

The author of Microcap is retiring and made the software free. It used to be $4500/seat. Versions 10, 11 and 12 (12 is the latest) are now free.

http://www.spectrum-soft.com/download/download.shtm

Vince.
--
K8ZW http://www.metalworkingfun.com http://www.hamradio.fun

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

Rob French (KC4UPR)
 

I'm looking to install the G4HUP buffer similarly to this: https://groups.io/g/BITX20/message/54410

What I'm thinking I'd like to do, is use double-stick tape to attach it to the underside of the uBITX PCB, assuming I'm able to keep the RF input line to the buffer short enough (<5 cm is what the install documentation says, I believe).  My question is, will this (having it attached directly to the uBITX PCB bottom) have any adverse RF effects on uBITX receive?  (I know it shouldn't affect transmit, since the buffer will be powered off during transmit.)  I am not using this as a replacement for my uBITX receiver, but rather as a panadaptor output, so I don't want to muck up my RX!

Thanks!
Rob KC4UPR

Re: µBITX : Try starting to build a new kit .....-- some mistake

HB9FIH
 

SRI... the Nextion was from Amazon one deliverer in UK:

https://www.amazon.de/dp/B008RU8WAK/ref=pe_3044161_185740101_TE_item

Erich

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

HB9FIH
 

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

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

Behiels Jean-Pierre
 




 

Hi members;

 

I like to receive some additional documentation and info and possible some suggestions from experienced builders.

I like to buy a standard µBITX kit,but I will also add the already published modifications ,if they are ..

I do not exactly who they are and where I can found a full documentation of those mods ?

Like a full colour touch screen and many released mods and useful add-on features …

 

  • I hear talking about some NEXTION screens and so on ….
  • Updated software implementations ?
  • K5BCQ kits ?

 

Could some of you point me in the right direction where I can found what like components (NEXTION screen) some add -on kits and of course the building documentation and information.

So I can read a lot,before I make a decision for full add-on µBITX kit with some additional features ?

I hope some people µBITX builders could give me the correct suggestions,and help to start with

 

Kindly regards Jean ON4AEF.

 

http://ubitx.net/recommended-fixes-and-mods/

 

 

ENGIE Mail Disclaimer: http://www.engie.com/disclaimer/


test

Behiels Jean-Pierre
 

Re: Gordon Gibby Digital Interface

Gordon Gibby <ggibby@...>
 

On the input to the VOX push to talk switch transistor, I used to use a 47K but we switched to a 4.7K to get a little better sensitivity for that circuit.  It’s still presents almost 0 loading to the audio source.   

I use the extremely cheap adafruit 1475 usb sound dongle , but probably there are much better ones out there— if anyone has ever found a study comparing them I’d be very interested

A good number of these are what is called “classless “. They don’t require any drivers other than what comes already in your computer.  I don’t completely understand that, but they work with raspberry pie as well as windows




On Oct 21, 2019, at 05:57, Gordon Gibby <ggibby@...> wrote:

[External Email]

​If he has a 47K, you can just slip the 4.7K in parallel, solder to the original leads of the 47K and it will be about 4K and work fine.   

There just isn't that much that is "critical"



From: BITX20@groups.io <BITX20@groups.io> on behalf of N8DAH <Dherron@...>
Sent: Monday, October 21, 2019 1:58 AM
To: BITX20@groups.io
Subject: Re: [BITX20] Gordon Gibby Digital Interface
 
[External Email]

Gordon,

 Thanks for the reply!

Sascha,

 I do apologize for the mix up I built a lot of them in a haze and must have mixed them up. Again very sorry about the mix up.

73
--
David

 N8DAH
Kit-Projects.com

Shop is open!

Re: LM324 AGC Issue

Neil Tolman
 

Albert,
This download only works if you've purchased something from them. Is it possible you could share the pdf with us?
K1NBT
Neil

On Sunday, October 20, 2019, 7:59:09 PM EDT, <albert@...> wrote:


Here is some information I passed to another person that helped them.
I had issues also but using the alternate calibration method, things popped right in.

Go to the amateurradiokits website.
You have to go to "My Account" dropdown (Orange Button)
Depending on the login state you may have to login.
There you will find a "downloads" link. (7th down)
Download the "uBitx Nextion Case" (last one, takes a while) 
Decompress is and look for a folder called "AGC" 
When you get to building / calibrating the AGC board use the "AGC Details.pdf" file found in the AGC folder! 
This is a multi-page PDF file.

Look at the entire file, at almost the end of the document is an alternate calibration method. Try that.

BTW:
DON'T download the second folder down (AGC) from the downloads amateurradiokits website. It will not give you ALL the information you need to know.
I used the AGC folder from the "ubitx nexton case" folder. (Spent a couple of days figuring that out.)


Hope this helps!
Albert
KE0PRX