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I don't use any of the'whisper' modes, but Japan to Eastern north America propagation is pretty difficult on the HF bands now. Steve Fabricant JS6TMW

I've been wondering about this as well, but I don't have the cases in hand yet.? Just got shipping confirmation, so WooHoo!?? Anyway, I was thinking something like this would work, but again, hard

I have noticed that I get spots from most of the world but none from the far east. My location is in Maine using dipole arranged north and south. Is it only me?? Carl

I don't understand that. The SB-104a and HW8 are SS. Where does the grid come in to play?

Hans, It was interesting to read the “back-story” of your kit development. ?Thank you for sharing this with your user community. 73, ?Ben ?K0IKR

shouldn't that work in the straight key mode ?of the QCX 73 Martin

Hello Joe The Si5351A chip has three stages conceptually: 1) Multiply the 27MHz reference crystal up to an internal VCO frequency, that theoretically must be in the range 600-900MHz 2) Divide down in

Hi Bob, Michael In the beginning (or at least closer to the beginning) was the Ultimate QRSS/WSPR kit http://qrp-labs.com/qrsskitmm.html with a crystal oscillator whose frequency was pulled by an LED

I like the look of that setup.

Hi, Have had my qcx case for several weeks, and i really enjoy it better than the ideas I've used until this point.?? Question regarding the opening just above the gps connection on the rig when

The Heathkit keyers are made for Heathkit's GRID BLOCK keying. They switch a NEGATIVE voltage to ground. Bob Macklin K5MYJ Seattle, Wa. "Real Radios Glow In The Dark"

The QCX keying requires a 3.5mm stereo bullet plug. For straight or bug semi auto keying connect to the tip and the body of the plug. Leave the second ring unconnected. And you'll be right!

I have two Heathkit electronic? keyers and wonder if they can be used on the QCX. I ask because it will work on my Heathkit SB 104a and Kenwood TS 820s but will not work on my Icom 740. The Icom

What you guess about the SDA/SCL lines is correct. I'm just wondering why so many people avoid using the I2C(TWI) interface as designed. I'm trying to learn how the Atmel I2C/TWI interface actually

It looks like Hans needed PC5 (normally used for SCL) for the IPPS interface to the GPS module. Maybe he can comment on why the hardware wiring ended up as it did. I am sure he had a very good reason

Hi Todd: Are you getting the once-per-second heartbeat ok? Roger G3YTN --- ** Roger Hill **

I don't understand why no one uses the I2C port the way it was intended? Bob Macklin K5MYJ Seattle, Wa. "Real Radios Glow In The Dark"

Hi Al (et al): Had time to put my 3S on the bench and got some interesting results: *Old FET* (the one I thought was bad) Idle current: 68 mA Transmit current: 240 mA Output voltage 3.63 volts (on an

With some more digging, I think I found an answer to my own questions.?? I discovered an Arduino library called SoftI2CMaster/SoftWire. The the SoftWire interface, which mimics the built-in "Wire"

Bill, ? I used the test file under example 3 (Si5351a-test.ino) worked OK for me. However I also could us Arduino help adding 136 and 474Khz I lowered the frequency from 1Mhz to .1 that allowed the