开云体育

Why are we still having discussions on End Fed Antennas? Thought that was why the Antenna email list was started.? Cheers, Guy WB7SZI

Never mind.....I see Allison already answered this. Too many threads............ 73 Kees K5BCQ

I am 100% cw and have been using my version 3 ubitx and use G3cwi outboard dual band filter with good effect,Ihave added a 5k1 resistor on the keying line and now the cw keying works as it should do I

Has anyone tried reducing the Tx only drive levels at the 45MHz and 12MHz filters by using the "PIN diode effect" of a 1N4007 at the locations of the 10 ohm resistors, R23 and R43 ? .... to reduce the

The amplifier as is does not tolerate high SWR at power well. With high power and high SWR the Mosfets get drain to gate punch through. Easy way to lower power, turn the power supply down as it will

That's a good suggestion, Adrian. I DO have a fuse in it. But perhaps not where you believe I should have one. I have one in the main power line. Where else do I need one? I fully expect the finals

Hi Thanks for adding me to the group. I'm new to the group and the Arduino. My friend has a Ubitx? and has asked me to look into upgrading the display. He has bought a MCUfriend (4532 label) on the

Interesting...I researched the Industry Canada documents this morning, and could not find any actual numbers for harmonics and spurious as applied to amateur radio. BASIC license holders are not

Hi, I compiled and installed the software on my Linux computer. I just followed the directions and corrected a couple of typos along the way. 73, Bill KU8H -- bark less - wag more

What is the issue you're having? I'm guessing it's not working. From your description it seems like you have it wired up in the right way. First, I would verify the paddle is mechanically functioning

I have Sunil's case with the front panel board.? The 4.7K resister is included on that? board.? I fashioned a plug/cable with the other two resistors as part of it. I have the KD8CEC software

Jim,? think about feeding it with ladder line into the balanced wire input to your tuner. Read ARRL antenna book chapt 7, pgs 1-3...? -- 72 and God bless KD4EPG

Those that missed out on the previous posts of this epic thread might look over this one:? ??/g/BITX20/message/55641 My conclusion (opinions vary): With careful design and perhaps

I had exactly the same issue on a raduino signal generator project...using a cheap encoder with detents.

It works fine in Linux for me. -- 72 and God bless KD4EPG

The stock encoder doesn’t have detents. Try one without the detents.? -- 72 and God bless KD4EPG

Thanks Gordon Exactly what I was looking for, and validates my circuit and calculations.

Made some progress on this. The board is now alive. The LCD and encoder sections are functioning. Testing the Si5351 is next, then see if I can convert uBitX20 firmware to run on it. www.w3jdr.com (

These days what changes is the number of qsos you can do with a qrp and an ordinary 100watts trx. With a better propagation this 'spread' would be much reduced.

I didn't realize that the band is good enough these days to go that low.