Sounds like Q2 is shorted. It is easy to replace Q1 and Q2. Cut the leads close to the package, or bend the transistor back and forth until the leads break, then carefully remove them individually.

Curt, in his post, stated: “... now the important part - the special quadrature cancellation network combining the unique mixer and dual audio chains only works on one band.” The Tayloe

Hi Shane Good luck! I am gradually incrementing my keyer speed every few months. I have it set to 14wpm now. On the assumption people will likely be replying at similar speed, I think I must be

Too funny, Tim. I remember seeing Kruchev bang his shoe on the table in glorious black and white ( my folks didn't have a color TV back then). He came across as what we Americans refer to as a

Hans, That is a lot of good news! I am looking forward to getting my U3S/D kit, the QCX+, as well as the 50W PA kit completed and on the air, so I can join you all. I don't know what propagation will

Hi Paul Even the mod itself is not particularly critical. I did find it prevented a particular glitch startup condition with a particular power supply, which once in 6 months of operation, caused me

Re - sparse wound toroids and the drop off of measured L, there is no black magic here - Re T50-6 sparse wound coils at 220 degrees for an L of approx 2.9uH as per diagram quoted on VK Ham. Toroid

Paul, I wonder what value Hans meant?- Value could also point to the wattage capacity of the resistor, or the tolerance. I doubt he would specify a resistance value and then comment it doesn't matter.

Hans, Is there any chance that a band option for 160M could be added to the firmware for those wishing to experiment with a lower reference crystal for the si5351? I have a QCX+ on order and am hoping

In the paper Hans put out on the PTT mod to the QCX for use with the 50W PA, he describes a hardware mod by adding a 10K resistor (value entirely uncritical) between the RX signal and +5V. My

DK: You are absolutely correct. Most inductance meters measure the "Apparent" inductance which includes the self capacitance of the windings. There are simple methods to measure the true inductance

I used a hammer and it fit fine.

I understand that the supply voltage is 5 volts but I'd like to know the current consumption. I've looked through the web resources, but I must have missed it. I'd appreciate a pointer to where

Hello Pierre The graphs in section 7.7 are spectrum analyzer screenshots from my Advantest R3361C spectrum analyzer, via GPIB to USB adapter. The top of the grid represents an insertion loss of 0dB.

Hi all Since the thread on the QRO QSO party somehow got hijacked, here's a new one. Apologies if it is not of interest... I was a bit unlucky at 1900Z, I had a reply to my first CQ on 40m

A bad connection on T1 is possible. I'd resolder that first. 73 Alan G4ZFQ

Aha.. it is the old third shoe in the pocket trick... a bit like the poisoned needle in the Phonograph trick as Maxwell Smart would say. I hear head scratching .. Phongraph.. wht a the hell is

I have finished my QCX+ 40M and is working well with the following exception. The sidetone level on receive is fine but on transmit it is very week (barely audible). I have tried adjusting the

Bruce My guess is you lost a solder connection somewhere. If you check your alignment and its no longer nulled, most likely its within audio, okay easy guess since nearly all of receiver is

Pierre bon jour. sitting listening to my 80m QCX+ this rig is amazing. I highly recommend its assembly - wonderful manual and thoughtful design. the companion 25/50 watt amplifier sits completed -