Re: Ideas for "bulletproofing" the uBitx
The V6 shines best on CW but I have been heard here in E Kentucky by others over the state and in Tennessee. Sure they have to crank up their RF gain to hear me but this is because too many hams use
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Bob Lunsford
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#85061
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Re: Broke off screw mounts from screen
Ian, you said it best... Thanks. Bob ¡ª KK5R
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Bob Lunsford
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#85060
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Re: Broke off screw mounts from screen
Loris, I can bend both ways. To people as here, that are taught the English system, it is easier and simpler for them to stay mainly with the English system because of tradition and seeing no need to
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Bob Lunsford
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#85059
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Re: IRF510 sale
OK thanks, I will just keep it stock then -- Frank, KG9H
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Frank KG9H
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#85058
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Re: Broke off screw mounts from screen
That's helpful for finding the right screw, but any idea how to fix the nuts that have snapped off? [email protected]> wrote:
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Gregg <greggahorton@...>
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#85057
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Re: Broke off screw mounts from screen
Remember that the measurement is from the max mating surface (tip) to contact surface or the overall length. Therefore, with flathead screws, it is not the length of thread, it is from the end of the
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Bob Lunsford
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#85056
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Re: Broke off screw mounts from screen
Hello, Remember! Lol When our fabulous Concorde was made parts of airplanes were made in Great Britain. They assembled perfectly in the hundredth of minutes with the pieces made in France despite the
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Gerard
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#85055
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uBitx V6 firmware 1.2 upgrade
I am looking for someone to tell how to put this firmware into the Arduino IDE? I have not unzipped it yet.... I have followed KD8CEC this, far and do I need Xloader to do it? or how? I tried to
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Jon
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#85054
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Re: Ideas for "bulletproofing" the uBitx
I can also vouch for the QRP-Labs 50 watt amp. Using a pair of IRF510's in push pull and a good heat sink it just......???? works. Using CW it barely gets warm even after a lengthy over on my
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R. Tyson
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#85053
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Re: Broke off screw mounts from screen
The World is a mix of new and earlier standards. As a resident of the UK we now use metric although a fair few folk who work on older equipment still need to use Imperial measurements as well as
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Ian Reeve <ian.radioworkshop@...>
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#85052
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Re: Broke off screw mounts from screen
Hy Bob The fact remains that in the world 6/7 billion people use the Decimal Metric System, that the ISO itself has established systems of multiples and submultiples related to the Decimal system ...
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Loris Bollina
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#85051
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Re: IRF510 sale
Ted, You are likely getting more power on 20m than on 40 and 80 because of C81 and R83 in the emitter leg of Q90.? They increase the gain at high frequencies to compensate for losses in the later
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Jerry Gaffke
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#85050
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Re: Ideas for "bulletproofing" the uBitx
I called the MPJA 800-number 800-652-6733 and did it over the phone for two packages of ten plus an impedance/capacitance meter (for $22.95) and had it all shipped for $6.95 and it took me only about
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Bob Lunsford
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#85049
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Re: IRF510 sale
"Power from the 16db 2n3904 based driver stages falls off as the frequency goes up. That may well be more of a factor than the IRF510's in your "much less on the higher bands". I concur with Jerry and
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Ted
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#85048
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Re: Ideas for "bulletproofing" the uBitx
Mad, Name one name brand radio that uses a Nano clone. Or better yet: Name one name brand radio that sells for $160. By your argument, we should just swap the whole thing out. Which is a perfectly
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Jerry Gaffke
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#85047
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VARIATIONS IN SWR WHEN CONNECTING LINEAR AMP
HI GOOD DAY TO ALL. NEW YEAR GREETINGS FROM INDIA. Today(01.01.2021) I measured the SWR of my antenna system using ANTUINO ANALYZER. It is observed that there are very wide variations in the SWR
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LAKSH MUTHU
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#85046
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Re: Ideas for "bulletproofing" the uBitx
Thanks Jerry, that is reassuring, and maybe a bit of a warning too :) HNY Scott
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Scott McDonald
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#85045
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Re: Ideas for "bulletproofing" the uBitx
Scott, Here's a report from Allison regarding two IRF510's operating in push-pull on 28v giving 50 Watts out. They have survived years of abuse, including shorted antennas. I sincerely doubt shorting
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Jerry Gaffke
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#85044
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Re: Ideas for "bulletproofing" the uBitx
I haven't tried shorting my antenna, but I don't recall any reports of uBitx damage due to such a short. The only issue I see is heat internal to the IRF510. Each IRF510 is only on 50% of the time,
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Jerry Gaffke
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#85043
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Re: IRF510 sale
Here's an excellent post from Allison regarding the use of IRF510's vs the RD16HHF: /g/BITX20/message/53765 The IRF510's can work fine up through 30mhz. At 50mhz I'd go with something
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Jerry Gaffke
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#85042
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