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Re: low output power
First check R141 if the value is more than 10 Ohms change it. Many boards
report failed R141.
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At 13.2V DV and 150mV 1Khz audio injection I get C132 = 1 V p-p Q13b = 0.6 Q13c = 12V Preset centered = 1.5V Preset top = 5V Q14c no load 20V i.e no Q14 present Check at the junction of C11 and C41 There is a suspicion that the values of L1,2,3 may not be optimum due to winding mistakes etc and the filter may be position wrongly in the 40M spectrum. Raj Hello fellow hams! |
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low output power
Hello fellow hams! ? My bitx40 have low output -only about 2 Watts on a dummy load Originally it has only 1W and the receive is OK I had checked and rechecked the TX section (Q13-Q15) All bias voltages are ok, i can adjust for 100mA at Q15 and speaking on the mic it, only goes to 250-300mA I also replaced Q13 with 2n3904, rewound T6 and replaced Q15 with no change. BTW Q13 and Q14 heats up while Q15 is cool.
??????????????????????????????? Base????????????????????? ?????????????? ??????????????? Collector Q13??????????????????????? 190mV????????????????????????????????????????????????? 1.3V Q14??????????????????????? 1.9V?????????????????????????????????????????????????????? 4.4V Q15??????????????????????? 2.4V (gate)????????????????????????????????????????? 10.4V (source) ? Initially, I suspected Q14 circuit (that’s why I rewound T6) and Q15 gate circuit but I found nothing. Are these readings normal or out of spec?
I suspected Q8 since I can only measure a few millivolts on its Base and emitter but if I short R81 I got 1V at Q7 collector and the output goes to 3W (even without speaking to the mic) and the receive goes louder
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Re: I7SWX PTT Pop Mute
Sorry, M1 and M2 are the other way around. Grounding K2.1 shorts the output of the pre-amp Q16 to earth on transmit, leaving the feed to the volume control and U1 open-circuit (and probably picking up hash). If you want to kill that 'pop' in and out of Tx, research back a few messages - I7SWX's circuit is a good start, Ted Doell and I have improved on that, and an earlier (much earlier) solution allows for CW sidetone (possibly also with better stability). Good luck - your 'logic' could use it ...
73 |
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Re: Problems with Arduino Nano: has anyone the program for BiTX 40?
?Correction: ? ?Nano has 15 pin positions per side On Fri, Aug 18, 2017 at 8:15 PM, Larry Smith <815cpu@...> wrote:
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Re: I'm sure it is my hork up re: tft.setFont()
#w8tee
Jack Purdum
That's not your fault. Starting with Rel 1.8 of the compiler, they tightened up the expression parser to catch more errors that before. Also, the mcufriend library inherits a lot of its functionality from the Adafruit libraries that the code uses. So you need to make sure that you have that library installed. #include <Adafruit_GFX.h> ? ? // https://github.com/adafruit/Adafruit-GFX-Library If you look in that library around line 85 you'll see the function prototype for setFont(). If you look at line 13 in the mcufriend header file, you'll see: class MCUFRIEND_kbv : public Adafruit_GFX { What this says is that the mcufriend library "inherits" the functionality of the Adafruit_GFX library, but adds some of its own stuff on top of that. So if you see an error that something is missing, it could be that you didn't install the Adaruit library. Jack, W8TEE ? From: Vince Loschiavo <vince320@...> To: [email protected] Sent: Friday, August 18, 2017 4:55 PM Subject: [BITX20] I'm sure it is my hork up re: tft.setFont() #w8tee Jack, not really a programmer.. started to compile got through the MorseCode.h issue, it balks complaining? Arduino: 1.6.9 (Windows 10), Board: "Arduino/Genuino Mega or Mega 2560, ATmega2560 (Mega 2560)"
?
I:\B40Software\B40SoftwareRel0106\B40SoftwareRel0106.ino: In function 'void ShowFrequency(long int, int)':
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B40SoftwareRel0106:857: error: 'class MCUFRIEND_kbv' has no member named 'setFont'
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? ?tft.setFont(); ? ? ? ? ?// Return to default size
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? ? ? ?^
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exit status 1
'class MCUFRIEND_kbv' has no member named 'setFont'
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This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
I checked in MCUFRIEND_kbv-master\TFT_HX8347GLUE.h and at line 110 it exists.. could you give a hint? on where I am messing up? Vince |
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Re: A little ardunio help
John P
On Fri, Aug 18, 2017 at 11:49 am, pat griffin wrote:
I am on the road so I can't verify this but I think you actually must have the compiler connected to some version of the arduino for the code to compile.I compile stuff all the time without an Arduino connected. Make sure you're clicking on the compile/verify icon in the IDE (checkmark in the upper left corner). ? -- John - WA2FZW |
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Re: Problems with Arduino Nano: has anyone the program for BiTX 40?
?
Nano has 30 pins per side and sometimes the six pin header pin is included. ? Use the below to search for like items or order from these sites as shown. ? New Nanos usually come with the Nano port - USB cable so you can down load sketches. ? I program my Nanos not plugged into the DDS.? Just make sure the NANO (pins) is resting on non-conductive surface. ? I’m sure other members have better parts sources IE ? ?K9AGE ? I would use pre-cut 15 pin headers as I find they are a bit tricky to saw…I use a FINE tooth hobby saw. ? The pins are segmented so small wire cutter pliers should work. Make an effort to keep pins and headers at right angles to the Nano./ DDS PCB. You can solder a center pin and or header and check for alignment. Then good to go-solder all. Check for solder bridges etc.. ? If you’re not sure about this procedure- note the component side and place a mark denoting the USB port for Nano insertion. ? And finally I write the version # on a self-stick Dot? This way I know what sketch I downloaded into the Nano .? I have about 4 Nanos floating around on my desk so I try to keep from confusing myself.? Otherwise just boot the Nano and DDS will tell all. ? copy and paste this Ebay item number should show Header pins ?eBay item number: 171686744816 ? ? copy and paste this Ebay item number and it should show the headers: eBay item number: 292149896446 ? NANO IO Expansion Board +400 Point Breadboard+120Pcs Jumper Wires Male/Female copy and paste this Ebay item number and it should show the headers: eBay item number: 282608752030 I show and used more wires on the LCD than are needed,.,to ?lazy to make more efficient for now. I encourage you to shop around and I like free shipping :) I’m almost certain many BITX’ers know of better sources. 73 Larry WA9DOH On Fri, Aug 18, 2017 at 3:56 PM, John D (gmail) <1practical.man@...> wrote:
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Re: A little ardunio help
Jack Purdum
You can always compile a source file without actually having a board physically attached. You can do a "compile only" (no upload) by clicking on the check mark icon below the File menu option. However, you must always have a board selected even if one's not attached to the system because the compiler needs some compile-time information about the processor. Jack, W8TEE From: Mike Bryce <prosolar@...> To: [email protected] Sent: Friday, August 18, 2017 4:54 PM Subject: Re: [BITX20] A little ardunio help On Fri, Aug 18, 2017 at 01:37 pm, Jack Purdum wrote: By God, Jack, I owe you a beer!That worked! Email is a bit odd here. It comes in on the? mac in my office, and the windows machine is in the basement. They are not linked. So, got the file from the mac, put it on a flash drive, headed to the basement and did what you said. the file complied without issue, but I had to tell the IDE that I was using the MEGA. Apparently one can compile a sketch without having the hardware. So the question is, why wasn't the morsecode.h in the file that I downloaded from this site? Mike, WB8VGE |
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Re: A little ardunio help
Jack Purdum
The idea of a "sketch directory" is okay if you're just trying things out, but if you are working on a "serious project", I think it's a good idea to have it off the root directory with a directory name that makes it clear what it is. I had a suggested directory structure in an earlier email today. Anytime I install a new version of the IDE, I make a root diretory with the release number in its name. My latest is? ???? ? ?E:\Arduino1.8.3 Under that directory are all the normal IDE files and subdirectories, but I also add a new one called?Temp. I then go into the File --> Preferences menu option and set the "Sketchbook Location" to E:\Arduino1.8.3\Temp. That way, any experimenting I do is localize to the current version of the IDE. As it stands now, I can go back to Rel 1.05 on this machine and see every sketch I've written since 2013. If I wanted to dust off an old machine, I could go back to pre-1.0. It's all personal preferences, but this helps keep me organized at an age where that's not easy. Jack, W8TEE From: John Backo via Groups.Io <iam74@...> To: [email protected] Sent: Friday, August 18, 2017 8:18 PM Subject: Re: [BITX20] A little ardunio help "Where in God's name does Ardunio hide the sketches?" The compilations (including the hex file) are in C:\[user]\AppData\Local\Temp\ It is usually in a sub-directory with a long list of numbers. That is an encoded version of the date and compilation number and starts with "build". Things have changed a bit with recent versions, but most compilations can still be made with a "sketch" directory put where you want it.? Make a sub-directory named after your sketch and put the .ino file and other .cpp and .h files in there. Also under the sketch directory, include a sub-directory named lib or libraries and put found libraries in there. (You can also include them in the main Arduino library directory using a zip import, but they are wiped out with each new version. Incidentally, running the Arduino IDE in "verbose" mode (see preferences) will give you locations of files in the window under the .ino window, as well as error messages if any. john AD5YE |
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Re: A little ardunio help
Jack Purdum
Because you never downloaded it, I guess. They are two separate files dealing with two related, albeit different, elements of the program. Good coding style dictates that dissimilar objects be kept in different files. Because the second file pertains only to Morse code elements, I made it a separate file. ?I could have put it into a library, but that would be overkill. Jack, W8TEE From: Mike Bryce <prosolar@...> To: [email protected] Sent: Friday, August 18, 2017 4:54 PM Subject: Re: [BITX20] A little ardunio help On Fri, Aug 18, 2017 at 01:37 pm, Jack Purdum wrote: By God, Jack, I owe you a beer!That worked! Email is a bit odd here. It comes in on the? mac in my office, and the windows machine is in the basement. They are not linked. So, got the file from the mac, put it on a flash drive, headed to the basement and did what you said. the file complied without issue, but I had to tell the IDE that I was using the MEGA. Apparently one can compile a sketch without having the hardware. So the question is, why wasn't the morsecode.h in the file that I downloaded from this site? Mike, WB8VGE |
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Re: A little ardunio help
"Where in God's name does Ardunio hide the sketches?"
The compilations (including the hex file) are in C:\[user]\AppData\Local\Temp\ It is usually in a sub-directory with a long list of numbers. That is an encoded version of the date and compilation number and starts with "build". Things have changed a bit with recent versions, but most compilations can still be made with a "sketch" directory put where you want it. Make a sub-directory named after your sketch and put the .ino file and other .cpp and .h files in there. Also under the sketch directory, include a sub-directory named lib or libraries and put found libraries in there. (You can also include them in the main Arduino library directory using a zip import, but they are wiped out with each new version. Incidentally, running the Arduino IDE in "verbose" mode (see preferences) will give you locations of files in the window under the .ino window, as well as error messages if any. john AD5YE |
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Re: Pop mute
开云体育Just good practice, I have also done this to the Raduino power feed. Ted On 19/08/17 11:56 AM, Dexter N Muir
wrote:
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Re: Problems with Arduino Nano: has anyone the program for BiTX 40?
Excellent, Larry.
If one gets a new Nano, install it with male and female removable headers. It makes things a whole lot easier, and does not effect operation to any great extent. The headers are easily available (up to40 pins) online. john AD5YE |
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Re: Pop mute
Hi Ted I don't know why you found the need to filter that supply. I derived mine from the V+ end of R101 (adjacent to the DDS connector) and had no troubles. Mind you, I had also 'super-cap' filtered the pre-amp's supply to kill the 'tuning clicks'. I think I had quoted my other change as from pin 7 to pin 3 - try the NPN's Collector to pin 3 rather than pin 1 - and while trying that it might be worthwhile trying to allow for CW sidetone - NPN collector to M1 (scrape a bit of resist off the track from C115?), 1k res M1 to M2 (easy enough under the board at the relay?), sidetone via resistor to M2 or U1.3. As in the Cheezels ad, "gotta be worth a crack, Nigel"? |
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Re: Problems with Arduino Nano: has anyone the program for BiTX 40?
"but since nothing works at all anymore it seems you have blown the processor and it must be replaced."
That's a pretty good idea, Jerry. I have done that with the TQFN package. The only problem is that if the processor is blown, most likely the CH340P chip is blown also. In fact, the CH340P seems to be more sensitive than the mcu. One has to replace that to get USB communication. However, the mcu can be programmed with ICSP (if the traces are good). Try re-programing at first, but If your Nano is wasted, get another; it is more effective in the long run (and they are cheap enough to buy 5 at a time). john AD5YE |
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Re: New bitx40 build.
Vince Vielhaber
I'm using what used to be an old icom desk mic. The element was replaced with the one that comes with the BitX. The button moves really easy into the lock position, too easy! 99% of the time I press the PTT, it locks.
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Vince. On 08/18/2017 07:07 PM, RCC WB5YYM wrote:
That will convert quite nicely, and even meet Dexter's approval. I think --
Michigan VHF Corp. |
Raj vu2zap
Kevin