Thanks Hans, Going to try it right a way. hanz

Hi Hans http://qrp-labs.com/qcx/qcxfaq.html#lowpower 73 Hans G0UPL http://qrp-labs.com

One of the reasons that the Mastr II (Exec) was chosen for the ProgRock tests was precisely because it is phase-modulated: This makes it agnostic to the signal source since it is not required that

I add an image... The leads are not shielded. On the image you can see, that I folded the leads on a short section, in a way where inductance is minimum. The paddles are homemade, 2 halfes of a

Hi, Richard Reminds me of the time I was working on an '85 vintage Panasonic VCR, replacing the microcontroller because of a damaged front load assembly. The original micro didn't have

Dr OM's Just finished my qcx for 20 meters (2nd one first was for 40 meters). So far so good was able to make a qso right a way 1000km. But i measured the power output with a external meter and with

I'm working on a similar project, but in my case it's an old Motorola Compa-Station (Motrac-based) on 10m and it uses phase modulation after the crystal, so a ProgRock should be a good substitute for

I put a little heatsink on the regulator but I run mine on 4 18650 batteries when topped up should be 16.4-16.8v .no issues.

thanks for the answer Peter. I have QCX20, at a voltage of 12 volts, current 0.535A, power 3.45 watts, 14V / 0.628A / 4.92W, 15V / 0.663A / 5.25W, 16V / 0.698A / 5.94 watts. measuring instruments R&S

As far as using a ProgRock goes, see the other posting that I just made - but I thought that I'd comment on using a Ge Mastr II (or Exec II) for a propagation beacon. Years ago (2001, actually) I

One thing to check for is electric welding equipment. That’s a pain since it’s broadband. Usually it tends to be fairly localized, though. The folk using it are unlikely to be particularly

On a workbench, I wired a GE Master II to a ProgRock simply by capacitively-coupling into the "hot" side of the crystal of an ICOM - an "EC" type is fine - 1000pF is suitable, but it could probably be

For many years now, I always mark pin 1 with a small dab of white paint as soon as I remove it from the package. A similar dab of paint on sockets if they are being used as well. This is

This reminds me of the time one of my colleagues at STC designed a low-voltage high-current PSU with an output capacitance of 1/4 Farad. He received the prototype from the assembly department, plugged

At least you hadn't soldered all the pins. Or turned it on! -- 73 Richard G4TGJ

I had been working on something similar with a Mastr II repeater on UHF and could make the proper frequency oscillator on the frequency I needed. The problem is the GE uses PM or Phase Modulation. I

on the last opamp on the QCX board, i tacked two corner pins, flipped the board over to see if it was seated good. and oops it was backwards! so solder wick to the rescue, i got it off and turned

I have, in fact my QCX20 is here with me now running from a homebrew 16V psu. It puts out about 2 Watts from my 12V NiMH battery pack and about 3.5 Watts from the 16V PSU. Its perfectly safe.

Hello Braden, Friday, July 5, 2019 Well, there's someone or someTHING around here that is putting a broadband pulsing signal across the AM air band and the local airfield are aware and

Hello Mikael, Friday, July 5, 2019 Ha, that's great I was going to ask if there's any downside to have a usbASP left connected. I know I could have just tried it but knowing my luck it would