Date   
Re: Bitx-40 S meter

Jack Purdum <econjack@...>
 

Hi Henning:

This is a fairly common error for anyone to make. First, the Arduino IDE expects the program code to be in a directory that shares the same name as the *.ino file. Therefore, you must name the subdirectory where you place the code BitXtra40. Second, any additional source code files (not library files) needed by the program must be in the same subdirectory as the *.ino file. This is why your compile failed. The source code directory had the wrong name. 

Let's say you have various VFO source code files in a main directory called RaduinoSource on drive C. For Andrew's code to compile successfully, your organization must be:

C:\RaduinoSource\BitXtra40\BitXtra.ino
                                               ReadMe.md
                                               UpsideDown.cpp
                                               UpsideDown.h

If you do this correctly, when you open BitXtra.ino in the IDE, you will automatically get the two UpsideDown files on their own tabs in the Source Code Window. It should compile after that. 

If you would like to learn more about Arduino C, I can recommend a really great intro programming book!  :>)

Jack, W8TEE


From: Henning Weddig via Groups.Io <hweddig@...>
To: BITX20@groups.io
Sent: Monday, April 17, 2017 4:34 AM
Subject: Re: [BITX20] Bitx-40 S meter

Andrew,
I had different LCD libs on my computer.
I used an older version of the Arduino IDE, i.e. version 1.67
Therefore I downloaded the latest version (1.82), installed and renewed the Si5351 lib.
Now I get the following error on line 298:
exit status 1'printFrequency' was not declared in this scope
I must say, that I am new to programming...

Henning
DK5LV


Am 16.04.2017 um 00:05 schrieb Andrew Whaley:
Tim, 
I've updated the sketch to display S numbers and added and extra separator on the frequency. It's all checked into github. 
Andrew



Re: Bitx-40 S meter

Tim - K7OB
 

Henning, you have to make sure all the files are in the same folder.  When you opened the .ino it probably made a new folder.  You need to take the .cpp file and the others and put them in that folder.  Then it will compile.

Out of the box.

Nemo
 

Hi all. Just got my new Bitx40. Nice kit and didn't take long before she was receiving signal on 40 nice. But sadly no transmit. I need to investigat it more to find the problem.

there are a couple of things in have noted. One is the very loud hiss from the speaker and the second is the tuning clicks.

again I need to go more investigation in to these. 

But on the hole not bad. Not bad at all for something strate out of the box. And knowing RF I was expecting something not to work first time.

i have joined the group now so let's see what others have found.

kind regards.

Paul 

Re: adding VK3YE AGC to BITX40

W0PWE
 

After building several AGC circuits on solderless breadboards and tweaking each one for performance I settled on the VK3YE circuit and I am very happy with the way it performs. My Bitx is scratch built but the audio stage follows the Bitx40V3 schematic very closely. 

It seemed like the AGC circuit was loading the audio coming from the pre-amp a bit so I added a resistor in series with the AGC amp - 33K if I remember correctly. I also tuned the resistor that is in series with the LDR. My LDR has a resistance of about 1K when the LED is operating at 20ma. 

There are a lot of different LDRs out there with different characteristics. I used one that I got from Tayda and I used their super bright red LED with it. I tried a different LED that was a little better matched in wavelength (650nm) to the LDR but I went back to the super bright. I can provide part numbers if you like. 

Re: adding VK3YE AGC to BITX40

Lawrence Galea
 

If I remember correctly the led was either orange or yellow but most probably orange
Regards
Lawrence

On Mon, Apr 17, 2017 at 10:57 AM, Soundararajan Ra. <vu2rjw@...> wrote:
Please let me know which color LED .I am using RED 5mm .
CW working well for ssb very poor response for me.


On Apr 16, 2017 6:11 PM, "Steve Greer" <km4ous@...> wrote:
It works petty well for me it's a lil slow but works. I think it was worth the build.

On Sun, Apr 16, 2017 at 7:40 AM, Soundararajan Ra. <vu2rjw@...> wrote:
Yes the same way connected .But results are not good  for ssb phones .But cw working good. 

On Apr 16, 2017 12:37 PM, "gaurav srivastava" <gaurav.mahesho@...> wrote:

OM Vu2RJW

Please let me know if its effective on Farhan's bitx 40

Also did you take audio in from Pin 1 (Red wire )of volume pot by connecting it directly to AGC and  audio out to Pin 1 of Volume pot


Thanks

73


Gaurav



Re: adding VK3YE AGC to BITX40

Soundararajan Ra.
 

Please let me know which color LED .I am using RED 5mm .
CW working well for ssb very poor response for me.


On Apr 16, 2017 6:11 PM, "Steve Greer" <km4ous@...> wrote:
It works petty well for me it's a lil slow but works. I think it was worth the build.

On Sun, Apr 16, 2017 at 7:40 AM, Soundararajan Ra. <vu2rjw@...> wrote:
Yes the same way connected .But results are not good  for ssb phones .But cw working good. 

On Apr 16, 2017 12:37 PM, "gaurav srivastava" <gaurav.mahesho@...> wrote:

OM Vu2RJW

Please let me know if its effective on Farhan's bitx 40

Also did you take audio in from Pin 1 (Red wire )of volume pot by connecting it directly to AGC and  audio out to Pin 1 of Volume pot


Thanks

73


Gaurav


Re: Bitx-40 S meter

Henning Weddig
 

Andrew,

I had different LCD libs on my computer.

I used an older version of the Arduino IDE, i.e. version 1.67

Therefore I downloaded the latest version (1.82), installed and renewed the Si5351 lib.

Now I get the following error on line 298:

exit status 1'printFrequency' was not declared in this scope

I must say, that I am new to programming...

Henning
DK5LV


Am 16.04.2017 um 00:05 schrieb Andrew Whaley:

Tim, 

I've updated the sketch to display S numbers and added and extra separator on the frequency. It's all checked into github. 

https://github.com/azw409/BitX40-RaduinoExtra

Andrew


Re: AGC

ohwenzelph
 

Best to describe the circuit you used in detail or list a link to the circuit that you used.

Often if I try to scratch build a circuit from a diagram I have found on the internet, I will think I have duplicated it when I have in fact introduced an error by misconnecting something, even though I have checked it several times and was sure it was right. So, if building from scratch, I'm inclined to try the simpler circuit first to see if it is adequate. And what seems simple when I pick it always ends up being more complicated when i actually try to construct it.

good luck

j aa1of

Re: Weird magic smoke...

 

What he said:

I tune down, seems good. Except, one the dial hit the low end, the dial started smoking

I was presuming the gnd end was correct and the others interchanged.
It will probably work to a limited extent as the pot would move the voltage away from
the sense pin and as the regulator got loaded the voltage would drop!

Only way to know more is to miswire intentionally and see. Hi Hi!

At 17-04-2017, you wrote:

Scratch that.  I have no idea why it would seem to tune properly.  But it is almost certainly mis-wired.


On Sun, Apr 16, 2017 at 09:11 pm, Jerry Gaffke wrote:

My bets are on him having GND in the center.  He reports that it seems to tune properly.  If 5V was in the center the tuning voltage would be stuck at 5V.

Re: Weird magic smoke...

Jerry Gaffke
 

Scratch that.  I have no idea why it would seem to tune properly.  But it is almost certainly mis-wired.


On Sun, Apr 16, 2017 at 09:11 pm, Jerry Gaffke wrote:

My bets are on him having GND in the center.  He reports that it seems to tune properly.  If 5V was in the center the tuning voltage would be stuck at 5V.


 

Re: Weird magic smoke...

Jerry Gaffke
 

My bets are on him having GND in the center.  He reports that it seems to tune properly.  If 5V was in the center the tuning voltage would be stuck at 5V.


On Sun, Apr 16, 2017 at 08:40 pm, Raj vu2zap wrote:

You would have wired the +V end of the pot to the center.

 

Re: Weird magic smoke...

 

You have probably wired the tuning pot wrong!

You would have wired the +V end of the pot to the center. As the pot comes to the ground end the current drawn will be high enough to smoke it.

Replace pot if required but first check wiring. Green wire should not go to the pot center!

73 Raj vu2zap

At 17-04-2017, you wrote:

Hello World!

I just wired my BitX40 and was ready to test out the receive. everything seemed right, LCD show the freq. and there was sound. when I tune the dial up, it goes up, then I tune down, seems good. Except, one the dial hit the low end, the dial started smoking and the radio power fluxed. I quickly removed power, double checked wiring, and tried it again. Same result. Once I hit the low end of dial, smoke from dial. Any ideas? I know basic electronics and nowhere near competent levels ;-) Any advice?


Thanks de K0KIK

Re: Weird magic smoke...

Jerry Gaffke
 

By dial, I assume you mean that 10k tuning pot.   Should have ground on one end and 5v on the other end, the voltage on the middle wiper pin of the pot tells the Raduino what frequency to operate at.  If the pot itself was smoking, that means you probably wired up ground to the middle pin, and when it gets close to the 5v pin the resistance is near zero and current is near infinite.  It's possible you damaged your 10k tuning pot, but perhaps not.

Perhaps should have a series resistor into the high side (5v in this case) designed into the board,  avoids catastrophic results in the event of a misswire. 


On Sun, Apr 16, 2017 at 07:21 pm, Daniel Kuecker wrote:

I just wired my BitX40 and was ready to test out the receive. everything seemed right, LCD show the freq. and there was sound. when I tune the dial up, it goes up, then I tune down, seems good. Except, one the dial hit the low end, the dial started smoking and the radio power fluxed. I quickly removed power, double checked wiring, and tried it again. Same result. Once I hit the low end of dial, smoke from dial. Any ideas? I know basic electronics and nowhere near competent levels ;-) Any advice?

 

Weird magic smoke...

Daniel Kuecker
 

Hello World!

I just wired my BitX40 and was ready to test out the receive. everything seemed right, LCD show the freq. and there was sound. when I tune the dial up, it goes up, then I tune down, seems good. Except, one the dial hit the low end, the dial started smoking and the radio power fluxed. I quickly removed power, double checked wiring, and tried it again. Same result. Once I hit the low end of dial, smoke from dial. Any ideas? I know basic electronics and nowhere near competent levels ;-) Any advice?


Thanks de K0KIK

Re: Bitx-40 S meter

Tim - K7OB
 

Andrew, I got the sketch all uploaded and working.  A couple things to look at - the max frequency is set to 7,210.00.  I changed this in my set up already to 7,310, but you might want to update that in the sketch.  Also, can you tell me if the calibration works the same as it did in Farhan's sketches?  I am off by almost exactly 1khz.  For some reason the original analog pin that was set for the calibration burned out, so I changed the sketch to use A1.

Anyway, what pin is mapped for the Calibration so I can get it set correctly.

Thanks

Tim

AGC

Jorge Luiz Fenerich
 


         Greetings to all, I set up the AGC and S. mess with the LM324 but I'm having trouble adjusting it 'is there any error in the circuit? Thank you.
  Jorge PY2PVT _._
--
  73 de Jorge PY2PVT
  Campinas SP
  GG67MD

Re: Noticed tuning clicks when trying a different power source.

AndyH
 

Do you have caps on the encoder?  I had clicks and bouncing when operating from a battery.  I installed caps to debounce the encoder and found the clicks disappeared as well.  Now I'm free of clicks on both battery and the Powerwerx switching PSU.


I used 0.1uF as in this example:  https://hifiduino.files.wordpress.com/2010/10/enc_debounce-288x216.jpg

Re: Snap Crackle Pop

Jerry Gaffke
 

You might follow along with Formula706 and "Bitx40 Low power output problem". 

Looks like exactly the same problem.

He says when he keys the mike, the voltage at the drain drops from 12v to 0v, is that what you are seeing too?  Sounds to me like something blew, but left enough smokey carbon residue to leave a high impedance path for the 12v to get down to the drain.  But once the IRF510 draws a little current, then that drain voltage drops to zero and all of the 12v is across said smokey carbon residue.  My best guess.

Jerry, KE7ER



Re: Bitx40 Low power output problem

Jerry Gaffke
 

You say that when you key the mike, the drain voltage drops to zero.  It shouldn't, especially if you are not speaking into the mike.  I'd guess one of the traces or inductors between the PA-Supply and the IRF510 got blown.  Key the mike and figure out how far down through that stuff the 12v gets, that should be a clue.

>   i tried a jumper from PA power to to drain, 

Bad idea.  Then all that happens is the IRF510 shorts your power supply to ground at 7 million times per second, and that energy has nowhere to go except to heat up the IRF510 and any traces and wires that might get in the way.

Jerry, KE7ER


On Sun, Apr 16, 2017 at 11:43 am, <Formula706@...> wrote:

Im sure this has been cover in a previous post but i could not find the same symptoms. I accidentally shorted the heat sink on the irf510. I had no power out at all after that. Power from PA is 12v, i have 12v at the drain but when i key up it drops to 0. i tried a jumper from PA power to to drain, it worked but its only putting out in miliwatts when talking in the mic. before i had about 3 watts. i have checked capacitors on line buy they seem to be fine. I have even removed the mosfet to test and its working like normal. Any ideas of what to check next or things to look for?

 

Re: Bitx40 Low power output problem

Formula706@...
 

I am getting 3.98v at the gate when transmitting. The traces to the gate look fine. Checked continuity and nothing broken.