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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

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

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

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

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 ...

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

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

"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

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

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

Thanks Jerry, that is reassuring, and maybe a bit of a warning too :) HNY Scott

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

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,

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

That makes sense, I should have gotten out my calipers [email protected]> wrote:

I've never tried going much beyond 12v on the uBitx. If I were to do it, I'd start with the qrp-labs 10W PA that I have built up. Power out should be proportional to the square of the supply voltage,

I have 19V and on 40 meters, about 20 watts. Much less on the higher bands. The IRF510 is a poor choice for higher power and higher frequencies, it is slew rate limited.

Not to mention RF parts availability.? IRF510s can be found almost anywhere.? Anyone that has tried to source RF transistors I'm sure can appreciate this -especially those living in remote areas. 73

"Name brand commercial radio" does not describe the uBITX which is designed to be less expensive and more desirable by people in India and other countries, even here. This includes me and is the

That is a very neat and interesting idea. However, another commenter here stated that doing this could affect the higher (15/10M) output power for the V6 which is already challenged by lower power