Re: 12vDC wiring and hookup
I use a separate switch DPDT ON-OFF-ON switch. In one position you feed 12V to both the main board and the final, in the other on position I feed 19.8 volts to the final and 12 volts to the board as follows: Switch contacts ? 1?????????? 2 3?????? ???4???? ?Rear of switch view. 5?????? ???6 ? Connect 12V ?from power supply to 1,2 and 5 Connect pin3 ?to power for the board (PWR1) Brown wire Connect pin 4 to final power (PA-PWR) brown wire Connect pin 6 to Final voltage. (In my case 19.8V) ? When the switch is in the center off position no voltage is fed to any circuit. In the down position 12 volts is fed from pin 1 to 3 powering the board and via pin 2 to pin 4 sending 12 volts to the final. In the up position pin 5 feeds 12 volts to the board and the final voltage on pin 6 is fed to the final. (Remember when the switch is in the down position the upper contacts are connected and vice versa.) This allows me to select either high or low power. ? V/R Fred W4JLE ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Crippen81@...
Sent: Friday, March 17, 2017 8:00 AM
To: [email protected]
Subject: [BITX20] 12vDC wiring and hookup ? I am pacing the house waiting for my Bitx40 to arrive (we. Should be mere days away now) and looking over the build plans. I am looking for some clarification on the 12v power. From the power jack do you run direct to the volume pot for on/off and then distribute to the board or are all the connections made in parallel?? If you parallel the connection wouldn't that keep power flowing into parts of the board after other pieces (via the on/off volume pot) had been turned off?
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Re: Letting the smoke out
!!!!!!?? It's alive !!!! It was a burned trace. I traced the voltage and saw 13.7 at L8 and 7-9 at T7.? I soldered a jumper on the back of the board from L8 to T7 pin 6 and now I have 13.7 volts at the Drain and reasonable RF output measured by my power meter into my dummy load. Thanks for the help.
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Re: Changing frequency display
Adding momentary switches to both ends of the potentiometer would be a simple and frugal alternative to holding the pot at either 0 or 10k ohms. Another approach would be to use a rotary encoder and Jack's code. Why does anyone want greater resolution on SSB? Or is it just an exercise in programming for the fun of it?
Confused in Illinois
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Re: Wiring the EP sockets
On 3/17/2017 7:47 AM, richard kappler
wrote:
that doesn't work switch it to 5. I don't like that
as much because it requires making a QSO. Which would you do in
my position?
regards, Richard - W2KAP
But that's the fun part! And then you can get an audio and signal
report. Win-win!
Jonathan - KK6RPX
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Re: MAR-3SM+ and new display/VFO board coming
I have a Yahoo group named SoftwareControlledHamRadio and some posts are about the antenna analyzer. No other components need to be changed.?
Jack, W8TEE
From: Kelly Jack <kellyjack1968@...>
To: [email protected]
Sent: Friday, March 17, 2017 3:31 AM
Subject: Re: [BITX20] MAR-3SM+ and new display/VFO board coming
Jack
Is there a group for discussing the analyzer? Wondering if any other component adjustments were required for the MAR-3SM+.
Regards?
Simon VK3ELH
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Re: Wiring the EP sockets
Wiring it the way you have in the drawing will work perfect for me. The only thing I'm struggling with now is the mic. It has a three section jack (tip,ring,grd) as well. I'm figuring I could either split it out to both 4 and 1, but that might do something funky. Perhaps try 4 first and if that doesn't work switch it to 5. I don't like that as much because it requires making a QSO. Which would you do in my position?
regards, Richard - W2KAP
On Fri, Mar 17, 2017 at 10:35 AM, Randy Hall <listk7age@...> wrote: Hi
For the speaker, depends on how you plan on using it.
If the radio will not have an internal speaker, then wire up to pins 3 and 4.
If the radio will have an internal speaker, then you need to wire up the jack as in the drawing that I posted. Then when you plug in external headphones or speakers, it will shut off the internal speaker.
Randy
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Re: calibration routine fixed (raduino v1.0.2)
What OS are you using?? I've run in to this in Linux if my user account didn't have permissions to use the serial interface.? If it's Windows, it's possible you have the wrong COM port selected.
On Fri, Mar 17, 2017 at 9:02 AM, Tim - K7PTM <tamccain@...> wrote: In attempting to upload this sketch to my arduino, I am getting the following error avrdude: error: programmer did not respond to command: exit bootloader I have tried it multiple times, and have changed USB ports in case it was a USB error, but to no avail. Thanks
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Re: Changing frequency display
Some of these arguments confirm why I use a rotary encoder for tuning and menu selection. I have discussed my Fast Tune method here using the encoder which changes the frequency increment automatically when you start turning the encoder at a faster (user-defined) rate. This allows you to make large frequency changes without consciously changing the tuning rate. As you approach the desired frequency and slow your "turn rate" on the encoder, the increment automatically drops back to the default "fine-tuning" rate. All of the Fast Tune parameters can be set to suit your specific taste. The encoder is a cheap KY-040 with builtin switch which costs about a dollar. Farhan's tuning is very clever and doesn't require interrupts, which may be an advantage, depending on whatever other features you're adding. Fast Tune does use the Nano timer interrupts, but the code's pretty easy to understand. (See:?QRP
Quarterly,
April, 2016.)?
Jack, W8TEE
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Rafal, You're probably right, the impedance mismatch at the product detector is a good issue to look into. ?Check crystal filter response carefully before and after making any changes to impedance there, the shape will likely get better. ?Perhaps borrow the transformer scheme from the uBitx: ?/g/BITX20/message/22888? ?I'll likely be borrowing the entire uBitx design someday, addresses most of Allison's criticisms and gives multiple bands with a minimum of band specific filter switching. ?I' plan to use the uBitx with a resonant EFHW antenna tuner to limit out of band signals on rx, further reduce harmonics on tx. Jerry, KE7ER
On Fri, Mar 17, 2017 at 01:45 am, Rafa? Lichwa?a wrote: The bug found (in my opinion) is just wrong Zin/Zout attenuator between 3rd amp and product detector...
?
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Re: Wiring the EP sockets
Hi
For the speaker, depends on how you plan on using it.
If the radio will not have an internal speaker, then wire up to pins 3 and 4.
If the radio will have an internal speaker, then you need to wire up the jack as in the drawing that I posted. Then when you plug in external headphones or speakers, it will shut off the internal speaker.
Randy
On Fri, Mar 17, 2017 at 7:28 AM, richard kappler <richkappler@...> wrote: I realized I should have put my understanding down along with the ask for help. Attached is a drawing I found that seems to represent our EP sockets included in the kit. My understanding is that, for both mic and head phones, Pin 1 would go to ground (black wire), and the brown wire would have to be split out to connect to both pins 2 and 5, at least on the headphones (stereo), not sure about on the mic though. For reference, I will be using?
Does this sound about right?
regards Richard - W2KAP 
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Re: Wiring the EP sockets
Randy,?
Thanks for that drawing, I had not seen it. I believe that will resolve the issue for me.
regards, Richard - W2KAP 
On Fri, Mar 17, 2017 at 10:28 AM, richard kappler <richkappler@...> wrote: I realized I should have put my understanding down along with the ask for help. Attached is a drawing I found that seems to represent our EP sockets included in the kit. My understanding is that, for both mic and head phones, Pin 1 would go to ground (black wire), and the brown wire would have to be split out to connect to both pins 2 and 5, at least on the headphones (stereo), not sure about on the mic though. For reference, I will be using?
Does this sound about right?
regards Richard - W2KAP ![]()
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Re: Wiring the EP sockets
I realized I should have put my understanding down along with the ask for help. Attached is a drawing I found that seems to represent our EP sockets included in the kit. My understanding is that, for both mic and head phones, Pin 1 would go to ground (black wire), and the brown wire would have to be split out to connect to both pins 2 and 5, at least on the headphones (stereo), not sure about on the mic though. For reference, I will be using?
Does this sound about right?
regards Richard - W2KAP
On Fri, Mar 17, 2017 at 10:14 AM, richard kappler <richkappler@...> wrote: Thinking I fully understood the wiring of the BX and then having buggered it up more than once, I ask the collective for instructions for wiring up the two EP jack sockets. I have the link from last week??but again would like some further guidance to make sure I fully understand before firing up the soldering iron as I don't think my board can take another wiring muckup.
regards, Richard - W2KAP ![]()
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Re: Wiring the EP sockets
Richard
EP, is that the ?ear phone jacks?
If so, plug in a plug and use an ohm meter to figure out which pin on the plug goes to the pin on the socket.
Also, someone posted this drawing a while back.
Randy, K7AGE
On Fri, Mar 17, 2017 at 7:14 AM, richard kappler <richkappler@...> wrote: Thinking I fully understood the wiring of the BX and then having buggered it up more than once, I ask the collective for instructions for wiring up the two EP jack sockets. I have the link from last week??but again would like some further guidance to make sure I fully understand before firing up the soldering iron as I don't think my board can take another wiring muckup.
regards, Richard - W2KAP 
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Re: MAR-3SM+ and new display/VFO board coming
You can read the assembly manual and find that there is a substitute part for the IC. It is a SMD, but I had no trouble soldering it to the board and I'm two years younger than dirt. You can find the assembly manual at QRPGuys.com. They also sell the PCB.
Jack, W8TEE
From: Roy Appleton <twelveoclockhigh@...>
To: [email protected]
Sent: Friday, March 17, 2017 8:48 AM
Subject: Re: [BITX20] MAR-3SM+ and new display/VFO board coming
If there isn't, it would probably be a good idea, as many boards that have been sold already! Roy,
WA0YMH
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Re: calibration routine fixed (raduino v1.0.2)
Did you install the IDE drivers?
Jack, W8TEE
From: Tim - K7PTM <tamccain@...>
To: [email protected]
Sent: Friday, March 17, 2017 10:02 AM
Subject: Re: [BITX20] calibration routine fixed (raduino v1.0.2)
In attempting to upload this sketch to my arduino, I am getting the following error avrdude: error: programmer did not respond to command: exit bootloader I have tried it multiple times, and have changed USB ports in case it was a USB error, but to no avail. Thanks
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Thinking I fully understood the wiring of the BX and then having buggered it up more than once, I ask the collective for instructions for wiring up the two EP jack sockets. I have the link from last week??but again would like some further guidance to make sure I fully understand before firing up the soldering iron as I don't think my board can take another wiring muckup.
regards, Richard - W2KAP
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Re: calibration routine fixed (raduino v1.0.2)
I figured it out, the wrong device type was chosen. ?
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Re: calibration routine fixed (raduino v1.0.2)
In attempting to upload this sketch to my arduino, I am getting the following error avrdude: error: programmer did not respond to command: exit bootloader I have tried it multiple times, and have changed USB ports in case it was a USB error, but to no avail. Thanks
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Re: Using switching power supply....
I'm using a Samlex switching supply
that I use for everything in my shack. Works great. I wouldn't get
a cheap supply for radio work.
RPX
On 3/17/2017 12:15 AM, Yeonghwan Jun wrote:
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I wish to use switching power supply.
because I don't have power supply yet. but I can find to buy
cheap switching power supply.
I had know that the switching power supply make a lot of noise.
So I will add RFC and Capacitor to reduce noise. if I will.
Is it possible?
I didn't received my BITX yet.
But I want to finish it before getting reach my BITX.
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Re: 12vDC wiring and hookup
Yup. Run a wire from the + side of the
power jack to one side of the switch. Then put all three of the
other + wires to the other side of the switch, orange from the VFO
and the brown wires from both the PA and PWR.
On 3/17/2017 4:59 AM, Crippen81@... wrote:
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I am pacing the house waiting
for my Bitx40 to arrive (we. Should be mere days away now) and
looking over the build plans. I am looking for some
clarification on the 12v power. From the power jack do you run
direct to the volume pot for on/off and then distribute to the
board or are all the connections made in parallel??
If you parallel the connection
wouldn't that keep power flowing into parts of the board after
other pieces (via the on/off volume pot) had been turned off?
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Bob Benedict, KD8CGH
Craig Wadsworth
