Date   
BLT

Sandeep Lohia
 



---------- Forwarded message ---------
From: Sandeep Lohia <sandeeplohia12@...>
Date: Sat 18 May, 2019, 3:28 PM
Subject: BLT
To: <emrfd@...>


http://4.bp.blogspot.com/-9TnqHWtCgzY/VavZixpGnEI/AAAAAAAAARo/YOs7E-OTHZM/s1600/VU2ESE%2BBalanced%2BTuner.jpg

*C1 ground really necessary in middle?

this increasing the count of switched SM caps...






Re: uBITX v3 For Sale

WA9GQT@...
 

My uBITX v3 has been sold.  Thank you all for looking. 
73, Rod WA9GQT

Re: Antuino

Don--AE4DW
 

On Fri, May 17, 2019 at 09:15 AM, Don W wrote:
I'm just discovering the Antuino and reading a bit about it. Is there a source for a kit or, at minimum, the pc board?
Still scraping the egg off my face..totally missed the obvious link on the hfsignals page.

Re: upgrade firmware 0.20 to 3 or 4

Olivier Grand
 

So it's a V3
Regards Olivier

Le sam. 18 mai 2019 à 19:13, Olivier Grand via Groups.Io <olilou1961=gmail.com@groups.io> a écrit :
Hello all seems to be a TDA2822 as Audio amp
Regards 
Olivier

Le sam. 18 mai 2019 à 13:02, danilo datres <in3izq@...> a écrit :
here  some pics...  for  your help.   tnx in advance  danilo in3izq

Re: upgrade firmware 0.20 to 3 or 4

Olivier Grand
 

Hello all seems to be a TDA2822 as Audio amp
Regards 
Olivier

Le sam. 18 mai 2019 à 13:02, danilo datres <in3izq@...> a écrit :
here  some pics...  for  your help.   tnx in advance  danilo in3izq

Re: Original Bitx20 design

kc0wox Leeper
 

You can find historical documents on the original bitx20 at http://golddredgervideo.com/kc0wox/
They date all the way back to some of the original boards.
Leonard

Morse Code Tutor

Jack, W8TEE
 

All:

The source code and schematic from my FDIM talk on the Morse Code Tutor is now available in the Files section on SoftwareControlledHamRadio groups.io Group.


Please note that there are still some changes that I plan to make to the code, but I have no plans to change the hardware of the MCT. Al and I consider the MCT to be Open Source, subject to the MIT Open Source agreement. (This more-or-less means that you need to leave my headers in the files.)

Note that there are multiple files in the zip file and those files must all appear in the same project directory. There are also some non-standard headers used that are not part of the standard Arduino IDE. The URL for these non-standard headers are given after their #include directives in the MorseTutor.h header file. This is to be expected because the code uses the STM32F103 ("Blue Bill") microcontroller. This requires you to install the STM32F patch, and there are plenty of places to find help doing that. I used "Using the Arduino IDE with the STM32F" as my seach in DuckDuckGo (I'm done with Google) and found plenty of entries from which to choose, both videos and written.

Jack, W8TEE


Re: Inexpensive eBay Amplifier Kits

Joe Puma
 

Do you have a link to this video?

73
Joe
KD2NFC 


On May 18, 2019, at 11:05 AM, KM4TRT via Groups.Io <garello@...> wrote:

Hi N8DAH,
Thanks for the tip on Wa2EBY.  When I saw that GoldDregger Video had purchased the boards and done a complete build and test on the amp AND the accompanying  multi band filter, I went to FAR circuits and ordered the boards
They are 19.50 US + $3.5 shipping
Andy

Re: Lista component for ubitx 5 #ubitx

Curt
 

OM

the most difficult to source components (crystals, toroids, etc) can easily be seen here.  the other parts are more common, except the new v5 suggests using some VHF NPNs in the 45 MHz amplifier.  I don't know if there is a documented parts list.  Most of us purchase a circuit board kit to assemble and modify. 

http://www.hfsignals.com/index.php/ubitx-circuit-description/

Curt

Re: Original Bitx20 design

N7QL
 

Thank you Mark for that. I want to build it and if it works then I can make mods. I will build each section in modules so that if a mod doesn't quite work the original should work assuming no major snafus. 

Re: Inexpensive eBay Amplifier Kits

KM4TRT
 

Hi N8DAH,
Thanks for the tip on Wa2EBY.  When I saw that GoldDregger Video had purchased the boards and done a complete build and test on the amp AND the accompanying  multi band filter, I went to FAR circuits and ordered the boards
They are 19.50 US + $3.5 shipping
Andy

Re: uBitx "Shadow"

YO8UFO
 

Thanks for your advice, Evan./// It's model V4. Thanks!

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=