Date   
Re: Robot

Vic WA4THR
 

Do a Google search for "Improve BitX40 Audio" by VK3YE. He shows how to adjust the BFO frequency on the stock BitX40 that really helps the audio. You can also make the mods needed to use Allard Munter's V2 BitX40 sketch where he uses the Raduino to control the BFO similar to how it is done in the uBitX.

=Vic=

Re: Meetup at Dayton on 16th May?

Hans Summers
 


Hi Farhan et al

> I am getting by wednesday afternoon. It would be great to see you all!

I will be arriving late Tuesday night. Staying in the Holiday Inn. Will look forward to catching up with you and any other BITXers or QRP Labbers! 

FYI I will also have with me stock of most of QRP Labs product line, which will be available at vendors' evening on Thursday, and throughout the hamvention on Friday/Saturday/Sunday at the QRP Labs booth 6612. 

73 Hans G0UPL
http://qrp-labs.com

Re: Need uBitX documentation

Mark Hatch
 

Try ubitx.com.  Believe that is what you are looking for. Be aware that there is an error in the wiring of the volume switch.   There is a thread below that discusses this. 

73
Mark
AJ6CU

Need uBitX documentation

Rick Green
 

Hello,
I recently purchased a partially-assembled uBitX along with the 'Universal case' designed for it. Also included is an AGC board from kit-projects.com, and a 3.25" Nextion display.
Unfortunately, the only documentation I got was a several page manual for the case kit. I've found the basic docs on the hfsignals.com site, but I'm still looking for some additional pieces to the puzzle:

1) Schematic and assembly instructions for the tiny LED board that came with the case kit.
2) Wiring and installation instructions for the AGC board. I see the pictures of the PCB board trace to be cut, but I can't find any info on how to wire the switch, the RF gain pot, and basic power and ground.
3) How do I integrate the Nextion display? The case kit came with an alternate front panel with a larger cutout, but this display doesn't have the same connector pins on the side, so it's clearly not plug-n-play.

Can anyone point me to web sources for these missing pieces?

--
Rick Green, N8BJX

We, the People of the United States of America, reject the U.S. Supreme Court's
Citizens United ruling, and move to amend our Constitution to firmly establish
that money is not speech, and that human beings, not corporations, are persons
entitled to constitutional rights.

http://www.MoveToAmend.org

Re: Bitx 40v3 Diagram

Jerry Gaffke
 

Unfortunately, the link to download the Bitx40 schematic as a pdf from hfsignals.com is broken.
Not to point a finger, but somebody should fix this.
From hfsignals.com, click "Bitx40", and then "Circuit Description", then the link
just below the inline schematic, but I get a 404 error.
Attached is my local copy of the Bitx40 schematic pdf.
I was able to verify that v3, v4 and v5 of the uBitx are all available from the website as pdf's.

There is only one version of the Bitx40 board from hfsignals using surface mount parts.
Early boards starting around mid 2016 went out with an analog VFO, which proved a bit too unstable.
Starting in late Dec of 2016, all Bitx40's went out with a Raduino VFO into DDS1 using the si5351,
and L4 was removed from the board to disable the old analog VFO.   
Also, R106 removed, C103 removed, L5 is just a wire short, diodes D15, D16 became a single Bat54s dual diode.
All that happened in Dec 2016.  No further changes since then, except the Raduino now ships
with a bottom connector more suited to the uBitx. 
All Bitx40 Raduino's have shipped with the same firmware since 2016, an upgrade either v1 or v2
from Allard is highly recommended once you get the board working:  https://github.com/amunters

Jerry, KE7ER


On Thu, May 9, 2019 at 01:51 PM, Mike Reed wrote:
Howdy;
 I am having difficulty on finding board level documentation for the Bitx 40 v3 board I have. Searches keep coming up with small color diagrams that I cannot enlarge enough to see. What I have here is a Bitx that I am working on that has a large solder splash on the area of Q12 abd I would like to know what is affected so I can attempt repairs.
 Appreciate any directions there is.
 73
 Mike - N7ZEF

Re: Amateurradiokits wiring error

Mark Hatch
 

Thank you. Got to set this aside for a couple weeks. But plan to get back to it then and try your suggestions relocating the input to sensor. 

Mark

Bitx 40v3 Diagram

Mike Reed
 

Howdy;
 I am having difficulty on finding board level documentation for the Bitx 40 v3 board I have. Searches keep coming up with small color diagrams that I cannot enlarge enough to see. What I have here is a Bitx that I am working on that has a large solder splash on the area of Q12 abd I would like to know what is affected so I can attempt repairs.
 Appreciate any directions there is.
 73
 Mike - N7ZEF

Re: uBITX v3 For Sale

WA9GQT@...
 

*****Price has been reduced to $85 including shipping within the CONUS. *****

Re: Meetup at Dayton on 16th May?

Ashhar Farhan
 

I am getting by wednesday afternoon. It would be great to see you all!


On Thu 9 May, 2019, 10:41 PM Paul Carff, <pcarff@...> wrote:
I don't arrive until Friday.....  Anything Friday evening - Sunday is good for me.

Thanks,
Paul



On Thu, May 9, 2019 at 12:57 PM N8DAH <Dherron@...> wrote:
I will be at FDIM for the weekend keep me posted, Friday is about the only good day for me unless you do Thurs at 6ish. Can't do Thursday otherwise as Kit-Projects should be at vendor night which is 8-10pm and Sat is the Banquet with Sunday going home. In any event would be nice to meet you gents for sure!
--
David

 N8DAH
Kit-Projects.com

Shop is open!

Re: Meetup at Dayton on 16th May?

Paul Carff <pcarff@...>
 

I don't arrive until Friday.....  Anything Friday evening - Sunday is good for me.

Thanks,
Paul



On Thu, May 9, 2019 at 12:57 PM N8DAH <Dherron@...> wrote:
I will be at FDIM for the weekend keep me posted, Friday is about the only good day for me unless you do Thurs at 6ish. Can't do Thursday otherwise as Kit-Projects should be at vendor night which is 8-10pm and Sat is the Banquet with Sunday going home. In any event would be nice to meet you gents for sure!
--
David

 N8DAH
Kit-Projects.com

Shop is open!

Re: Meetup at Dayton on 16th May?

 

I will be at FDIM for the weekend keep me posted, Friday is about the only good day for me unless you do Thurs at 6ish. Can't do Thursday otherwise as Kit-Projects should be at vendor night which is 8-10pm and Sat is the Banquet with Sunday going home. In any event would be nice to meet you gents for sure!
--
David

 N8DAH
Kit-Projects.com

Shop is open!

Re: Meetup at Dayton on 16th May?

Eric Berman
 

Farhan

Glad to hear you will be at FDIM. Look forward to seeing your new projects and dinner.

Eric 
KC3GDV



On Thu, May 9, 2019 at 10:56 AM Ashhar Farhan <farhanbox@...> wrote:
Are any planning to be in Dayton? I thought we could meet up on Thursday evening at the dinner outside the Holiday Inn over dinner and coffee. 7 pm?
I am bringing in a new project that combines  an SNA and SWR meter and another one that is 'something about a raspberry'.
See you!
+ Farhan

Re: Meetup at Dayton on 16th May?

Karl Heinz Kremer, K5KHK
 

I'll be at FDIM. Would not mind shaking your hand and thanking you for all you've done for the hobby in person :)

--
Karl Heinz - K5KHK

Re: Meetup at Dayton on 16th May?

Vince Vielhaber
 

Dang, now I really wish I was going this year!

Vince.

On 05/09/2019 10:56 AM, Ashhar Farhan wrote:
Are any planning to be in Dayton? I thought we could meet up on Thursday
evening at the dinner outside the Holiday Inn over dinner and coffee. 7 pm?
I am bringing in a new project that combines an SNA and SWR meter and
another one that is 'something about a raspberry'.
See you!
+ Farhan

Re: Collins Amateur Radio Club - excellent BITX article

Balasubramanyan Cp
 

Thank you.
73s

On Wed, May 8, 2019 at 3:06 AM Balasubramanyan Cp via Groups.Io <bsnvu2yc73s=gmail.com@groups.io> wrote:
Dear Robert,
Thank you.
By the way please give your opinion about V5, 2018 MULTI BAND 10W QRP KIT.
Please reply to my email  bsnvu2yc73s@...
De  VU2UYC, Handle Balsun, from Kerala, INDIA.
73s


On Tue, May 7, 2019 at 11:48 AM Robert McClements <gm4cid@...> wrote:
The attached April Collins Amateur Radio Club Newsletter has a very comprehensive BITX article by Vince Loschiavo N2AIE which he has posted to the FB group.

Though it worthwhile to post here, hope Vince doesn't mind.

73, Bob GM4CID

Re: What have I done to the receive? Weird screech? #ubitx

Gwen Patton
 

Aren't verticals more susceptible to man-made interference because of the vertical polarization? That might be part of the problem?

Gwen, NG3P

resources to learn about HF radios #ubitx-help

Jens Kaemmerer
 

When my uBitx stopped working on RX + TX - I received a lot of helpful comments
from the subscribers of this forum.

In addition I benefited greatly from the following 2 Youtube channels in troubleshooting
the uBitx:

Alan Wolke, w2aew, https://www.youtube.com/channel/UCiqd3GLTluk2s_IBt7p_LjA

Chuck Adams, k7qo, https://www.youtube.com/channel/UC7CSitIbrMxj6jIldSWjJQg

-jens

Re: Robot

Wayne Leake
 

 The actual BFO frequency may not be at the optimal/best frequency for the Xtal filter.
 Some of the BITX40's had/have a trimmer capacitor to adjust that.
 There is a space on the board for it.
 One or two other components may need to be changed if a trimmer cap is added.

 

Re: Robot

Curt
 

Vaughn

hang in there - this radio stuff is about continuing to learn (even for those of us that may do technical work, we still have more to learn!)

interesting clue of a not-good sounding receiver.  first thing I would check is the calibration of the BFO (the fixed oscillator that shifts IF down to audio).  if the IF spectrum being downconverted is up against the 'skirts' of the crystal filter - it can sound quite bad!  this is the first thing I would check. 

because this same oscillator and filter are used to shift your voice up to IF - it would make transmit sound bad also, if this is the problem. 

the other ways to mess up a receive signal is to overdrive the audio amplifier, or to have improper bias on any of the amplifiers. 

I trust there are calibration instructions somewhere for the BITX - the uBITX that I have has the same type of calibration. 

Curt

Robot

Vaughn
 

Hi. OK I admit I have a BITX40, not built by me, but built in India. Was looking into building from scratch, but couldn't get the parts as cheep as the Indian build.

I have completed some upgrades and now have a working rig. Trouble I have is, when I listen to the received signal, it sounds a little robotic.

Is there a way to get a better sound from the transmitted signal? My worry is I may not get the QSOs I'm hoping for, as others may not tolerate this sound.

I'm asking here as may of you have far more electrical and programming skill than I do and so I hope will have an answer for me.

Many thanks in advance Vaughn