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W8TEE Software Release 1.07-09
Jack Purdum
All:
I have uploaded the new software for the BITX40 color TFT display and VFO PCB. The new release fixes a number of bugs, especially in the display and the processing of the encoder. Users should read through the source file as there is a lot of information in it that might be helpful. Support for the DS3234 Real Time Clock has also been added. Future improvements will allow the user to set the time and date at runtime. Right now, those parameters are set at compile time using the time and date objects of the host PC. (Hard-coded date/time constants are not used.) The manual has also changed a little and a small trouble shooting section has been added. Using a keyer, the RTC, or debugging requires uncommenting one or more symbolic constants that appear near the top of the source code file, after the #include pre-processor directives. Non-standard library files have their download sites given in the source file as a comment after the #include directive. Keep me posted on your use of the hardware and software. I'm particularly interested in those who are working to port Allard's features to this environment. Jack, W8TEE |
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Re: BITX QSO Night, Sunday, October 1, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere
John P
On Mon, Oct 2, 2017 at 01:40 am, Bill Meara wrote:
He was on a BITX40 to a mag loop.? Sounded good!Glad to hear that report! I put a lot of time into that antenna! Very happy to see that it actually works! I plan to publish the plans and software here and on the Yahoo MagLoop group as soon as I clean up the documentation a little. ? -- John - WA2FZW |
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Re: Zero Beating Bitx40
Similar to what Jerry suggested I connected my KX3 to 50 ohm dummy load that I had built into an Altoids box. I opened the box to let a bit of RF leak and connected a jumper wire to the BIX40 antenna center. Between the wire position and the KX3 output I could get any level signal I wanted.
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Re: BITX QSO Night, Sunday, October 1, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere
I worked John WA2FZW.? ?He was on a BITX40 to a mag loop.? Sounded good!? ?Then the dinner bell rang.? Then "60 Minutes"...73 Bill N2CQR On Sunday, October 1, 2017 11:48 PM, John P <j.m.price@...> wrote: On Sun, Oct 1, 2017 at 07:12 pm, KN4AAG Kevin Estep wrote: WA2FZW(?),NJ ? -- John - WA2FZW |
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Re: Zero Beating Bitx40
Hi with a little patience you can easily make your own step attenuators. The one in the first link can attenuate signals up to 80dBs The one in the second link one can attenuate signals up to 71dBs With these attenuators you can attenuate the signal in steps of 1dB. You can also use such an attenuator at the Input of the RECEIVER to reduce a signal that is overloading your receiver but NOT at the output of the TRANSMITTER because you will burn it as the resistors can only only 250 milliwatts maximum. Have a look at these links. Regards Lawrence
On Mon, Oct 2, 2017 at 6:10 AM, Jerry Gaffke via Groups.Io <jgaffke@...> wrote: Your signal generator is -10dBm, and an S9 signal is -73dBm. |
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Re: Zero Beating Bitx40
Your signal generator is -10dBm, and an S9 signal is -73dBm.
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So to make it so the signal generator sounds like an S9 signal you need 63dB of attenuation. Stacking 3 of those 20dB attenuators would work. Alternately, I suggest you set the signal generator down on the far side of the room, have it drive a couple feet of copper wire connected to the center pin of that BNC. Put a couple feet of wire on your Bitx40's antenna jack too. Tune the Bitx40 to receive the signal generator, then reduce the length of those wires till it sounds like a good amateur band signal. ? On Sun, Oct 1, 2017 at 07:42 pm, Curt M. wrote: I have a 50 ohm 20db attenuator. If I run my RigExpert analyzer into the attenuator and then the attenuator into the Bitx40, does this get me in an acceptable range to try and calibrate LSB or will the signal still be too high? |
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Re: Receiver Dead
My first BITX40 #66 the volume control failed. The failure happened when
I resoldered one lead that came off.
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The plating quality is not good IMHO. Check the DC voltage on LM386 pin 6. The degeneration leads me to think R111 or D18 failed. Raj At 02/10/2017, you wrote: I would imagine the vol control is suspect at this time... |
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Re: Receiver Dead
Dexter, It went dead over time. Looks like the horrible volume control have up the ghost. - f On 2 Oct 2017 8:45 am, "Dexter N Muir" <dexy@...> wrote: ... or wired AAF (Kiwi slang, arse-about-face). Measure your pot wiper-to-each-end. Rotate shaft to 'minimum' as though (or if, then as) mounted in panel. Now which end measures 0 ohms? That's the end that goes to 'earth'/0V (the black wire on Farhan's hfsigs Wire Up picture). |
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Re: Receiver Dead
I would imagine the vol control is suspect at this time... - f On 2 Oct 2017 7:48 am, "Vince Vielhaber" <vev@...> wrote: Excellent!? Use that to follow each step thru the audio with an antenna connected to it.? Doesn't matter what it's receiving, even noise will show an ever increasing waveform.? Actually noise is preferred in this case. |
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Re: Zero Beating Bitx40
Hi guys, I¡¯ve been tied up for a few days and just been able to revisit my original post.
I have a 50 ohm 20db attenuator. If I run my RigExpert analyzer into the attenuator and then the attenuator into the Bitx40, does this get me in an acceptable range to try and calibrate LSB or will the signal still be too high? |
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Re: Receiver Dead
Vince Vielhaber
Excellent! Use that to follow each step thru the audio with an antenna connected to it. Doesn't matter what it's receiving, even noise will show an ever increasing waveform. Actually noise is preferred in this case.
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Vince. On 10/01/2017 09:16 PM, Ken Macy wrote:
Vince --
Michigan VHF Corp. |
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Re: Receiver Dead
I'd definitely try to remember which toroid it was. My guess is that the insulation on the magnet wire wasn't quite properly removed, and you have a very flaky solder joint there, waiting to fail again. On Sun, Oct 1, 2017 at 06:31 pm, Michael Davis wrote: re-soldered the connections, (which didn't fix it) then glued the toroid to stabilize it. It's been fine ever since. |
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Re: Receiver Dead
Michael Davis
I too had intermittent receive. I used the very non-technical "tap" method. One of the tiny toroids had a problem either in the winding or the soldered connections. I tapped/wiggled it so that it worked, re-soldered the connections, (which didn't fix it) then glued the toroid to stabilize it. It's been fine ever since. I don't remember which toroid it was. Tap and move each one slightly while listening for signals.
Sent from Mike's iPad WA1MAD |
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Re: W8TEE pending software release and port(?)
#w8tee
Jack Purdum
Put a switch on an I/O pin and use INPUT_PULLUP with pinMode(). When a NO pushbutton is pushed, the line is pulled LOW, which changes its state. Jack, W8TEE From: Vince Vielhaber <vev@...> To: [email protected] Sent: Sunday, October 1, 2017 7:59 PM Subject: Re: [BITX20] W8TEE pending software release and port(?) #w8tee Wait a minnit.? I think I understand what they're so horribly trying to say.? When input pullup is NOT used, a floating connection is low (or presumably low).? So in order to get it to do something your sensor has to pull it high.? When the pullup IS used, your sensor has to pull the pin low. Vince. On 10/01/2017 07:54 PM, Vince Vielhaber wrote: > As I stated when I put it there, it came from the Arduino docs. > > Vince. > > > > On 10/01/2017 07:38 PM, Allard PE1NWL wrote: >> On Sun, Oct 1, 2017 at 04:01 pm, Vince Vielhaber wrote: >> >>? ? On the digital pins: >> >>? ? There are 20K pullup resistors built into the Atmega chip that can >>? ? be accessed from software. These built-in pullup resistors are >>? ? accessed by setting the pinMode() as INPUT_PULLUP. This effectively >>? ? inverts the behavior of the INPUT mode, where HIGH means the sensor >>? ? is off, and LOW means the sensor is on. >> >> This is absolutely INCORRECT. >> pinMode(xx, INPUT) and pinMode(xx, INPUT_PULLUP) only enable/disable the >> internal pull up resistors. >> They DON'T invert the behaviour of the input! >> >> 73 Allard PE1NWL >> > -- ? Michigan VHF Corp.? ? ? ? ? ? ? ? ? ? ? ? ? ? ? |
Bob Benedict, KD8CGH
Raj vu2zap
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