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Re: Calling West Coast BITX operators
Ag7bx, Portland OR. (Though I still have to assemble mine) On Jun 5, 2017 18:55, "Jonathan Peakall" <jpeakall@...> wrote: Hi All, |
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Re: cw speed
Hey Terry, I started learning from:if you want to practice copying off the air at various speeds, check the ARRL code practice schedule on the different bands, or you can download the same audio files from here: download them to your mp3 player, phone, pc, etc, go to sleep listening to them :) , etc practice every day for a while, even at slightly higher speed than you feel comfortable, don't worry if you can't copy everything, keep trying and it will eventually happen, then increase the speed a bit more, this also requires some patience, just give yourself time to learn this new "language". One of the most important abilities is to learn not to think about any missing characters because you'll miss a lot more trying to figure those out, just let them pass and keep copying, eventually you'll be able to just "fill in the blanks" and get the whole message, that's the same as copying voice transmissions, maybe you can't understand every single word, but you get the whole message and move on. You can begin copying on paper every character you get, but I suggest you make an extra effort to learn to copy on your head as soon as you can, even if it means to lower the speed. When you get to 25 - 30wpm it's very difficult to write everything on paper and it will eventually be a problem for your speed-progress. I hope that helps. I can work you at any speed you want, but maybe not on my bitx from here... Keep it up Terry and PRACTICE,PRACTICE, practice, practice, ....... 73 Dan HK4DEI On Wed, Jun 7, 2017 at 11:33 AM, terryhugheskirkcudbright via Groups.Io <terryhugheskirkcudbright@...> wrote: hi all |
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Re: cw mod
Many have used the tone-into-the-mike scheme and gotten it to work, it has been the most popular method of getting CW into a BitX for over a decade. ?But?I do think Allard's scheme is superior. ?No residual carrier or opposite sideband to worry about, no issues with trying to get a pure sine wave from oscillator through mike amp and modulator without distortion. Take a good hard look at Allard's instructions before deciding it is too difficult. ?There is a 10k resistor from Raduino to C107 for the "CW CARRIER wiring" that replaces the entire tone generator board. ?The sidetone and ptt ?and tx/rx hacks that Allard describes would remain about the same if using the tone generator board. ?
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On Wed, Jun 7, 2017 at 09:40 am, <terryhugheskirkcudbright@...> wrote: hi ? |
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Re: Tuning potentiometer too long to be fitted
¿ªÔÆÌåÓýI used the little shaft on supplied Volume control by drilling out an Al spacer (1/4') and crazy glued it to the smaller nylon pot shaft.? Works great.? I wanted the switch on the pot to save panel space. Mike, WA6ISP On 6/7/2017 9:35 AM,
terryhugheskirkcudbright via Groups.Io wrote:
hi |
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Re: IRF510- Temporary replacement?
The IRF510 gets plenty hot, a BS170 will likely blow in this circuit. ?Wear eye protection. ?T7 converts the 50 ohms to 12.5 ohms at the IRF510, you might go without T7 is using a relatively wimpy FET, and maybe power the PA from 6v instead of 12v. ?A BS170 requires less drive, so cut back on R136. ?Other big TO220 enhancement mode NFET's might be a better choice, they likely won't blow, ?just not give much output due to the order of magnitude increase in gate capacitance. ?I have my doubts, it's hard enough to get an RF amp to behave with thorough analysis.. ?
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On Tue, Jun 6, 2017 at 07:54 pm, Ryan Flowers wrote:
Looks like the Drain and Gate are reversed, but that's easy enough to resolve. Shall I just solder it in and give it a try? Or will I need to change R136 and/or RV1? Thanks a lot. This is a learning experience for me for sure :) ? |
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Re: cw speed
¿ªÔÆÌåÓýGet to above 15 to prevent deciphering the dits/dahs. ? G4FON program is a good solution to get this done. Uses Koch method. You learn the sound instead of dits/dahs.
? Van: [email protected] [mailto:[email protected]] Namens
terryhugheskirkcudbright via Groups.Io
Verzonden: 7 June, 2017 18:34 Aan: [email protected] Onderwerp: [BITX20] cw speed ? hi all |
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cw mod
hi
i am reluctant to solder bits to my bitx40 board cos all the connections are on sockets and also i am not happy poking around smd components. i am there thinking of the cw board from sunil which produced a tone to feed into the mike as well as a side tone. has any body produced cw by inserting a tone into the mike socket. terry |
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Re: Calling West Coast BITX operators
WA6ARA, Ridgecrest, CA -- Mike Herr WA6ARA DM-15dp Home of The QRP Ranch No trees were killed in the sending of this message, however, a large number of electrons were terribly inconvenienced. "Dad says that anyone who can't use a slide rule is a cultural illiterate and should not be allowed to vote. Mine is a beauty - a K&E 20-inch Log-log Duplex Decitrig." - Robert Heinlein |
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Re: Allard's Version 1.113
Hi David,
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good to hear that v1.14 works ok with you know. Perhaps you should upgrade your IDE to the latest version 1.8.2 73, Allard PE1NWL On Wed, June 7, 2017 18:23, bigdswitzer wrote:
That is v1.13. |
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Re: Allard's Version 1.113
That is v1.13.
"Sketch uses 30,936 bytes (100%) of program space. Maximum is 30,720 bytes.? Global variables use 1526 bytes (74%) of dynamic memory, leaving 522 bytes for local variables. Maximum is 2048 bytes." Just compiled v1.14 and that compiles nicely, no problem. Using IDE v1.6.9 David KG7WFM |
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Re: Raduino_v1.14 released
Should work fine, and not a bad idea.
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If you can't find 100k, could use a 10k pot between ground and the Arduino 5v digital CW transmit output, center wiper of pot goes on out to the 10k series fixed resistor that you already have. On Wed, Jun 7, 2017 at 08:46 am, Al Duncan VE3RRD wrote: I was just thinking about the comment on using the CW TX mode during antenna tuner adjustment and having to limit the key-down time. Previously you had used a 47K series resistor in the circuit to unbalance the modulator, this was reduced to 10K because the output power was low for many Bitx40 boards. A DPDT tune switch could be used, one half of which would insert an additional resistor in series with the 10K to Raduino D6 to reduce output power to 1 or 2W while the other half of the switch would key up the transmitter in CW mode. Possibly a trim-pot of a large enough value (100K ?) could be used for the additional resistor so the tune power could be set to the desired output power level. ? |
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Re: Raduino_v1.14 released
I was just thinking about the comment on using the CW TX mode during antenna tuner adjustment and having to limit the key-down time. Previously you had used a 47K series resistor in the circuit to unbalance the modulator, this was reduced to 10K because the output power was low for many Bitx40 boards. A DPDT tune switch could be used, one half of which would insert an additional resistor in series with the 10K to Raduino D6 to reduce output power to 1 or 2W while the other half of the switch would key up the transmitter in CW mode. Possibly a trim-pot of a large enough value (100K ?) could be used for the additional resistor so the tune power could be set to the desired output power level.
I haven't tried it yet, but does this sound like it would work? 73, AL VE3RRD |
Allard PE1NWL
W9ZIM
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