Hi, I intend on buying and building an 80m version QCX before, in 11 months time, import taxes are possibly raised on importing goods from the UK into the EU. Anyhow, lurking around, I noticed the iss

#qcx #t1 #80m

Does anyone use a receive antenna with the QCX? How do you manage T/R switching? Do you have a preamp? Thanks Richard - NS3C

#antenna #qcx #80m

Assume you are referring to LPF coils. Can you post closeup photo of that area of the board. Are you sure all items installed in correct position?

#80m

I await other comments, but at those very high resistances, it may well just be that you really should be careful to keep your fingers away from everything. I would hold T1 down in a fixture and try t

#80m

2.4w at 13.8v. PCB v5

#problem #80m

Good deal Hans. I realize now that the odd character is simply the S-meter moved over to the left with the _ underscore beneath. Scott

#80m #qcx

John, wow. You have shown the QCX to be a "quantum" ready rig. Really, really good exercise!

#80m #qcx

Hans, I want a QCX+ for 160 meters. The lower frequency should work fine with the QCX+ design. 160 meters is a great band for CW and antennas are not too hard to make work there. Dave. N2SN

#15m #80m

The purpose of this mod is to give QCX access to a receive-only antenna via the 50 Watt PA kit. This can be added to a functioning PA or the kit can be built as a T/R switch without the amplifier circ

#mods #pa #80m #160m

Pics...

#80m

Wow! You ZLs have real patience! We are severely spoiled here in the US! I live in the forest and I'm accustomed to slower deliveries, but many city dwellers are too impatient even for overnight deliv

#qcx #80m

okay forgive me for talking to myself here! of course I should be focusing on L3 (the PA end). removing about 6 turns on L3 and 3 turns on L2 has the power up to 4 watts. been a few years since I chec

#80m #qcx

Hi All Thanks for the suggestions. It does behave much more as I expected when properly terminated with a 50 ohm resistor across the probe. I believe the tx input impedance is around 47 kOhm so I'll t

#40m #80m #vfo

Steve, Thanks for updating this post! And thanks for your guidance getting through the theory and measurements! Yes, the rig is sounding good! I had a QSO with W1DV up in North Carolina with it this m

#80m