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Chris Wilson 06 January 2018 V3.12a has a IV menu option to give 180 degree out of phase outputs from CLK0 and CLK1 of the Si5351A synthesizer. Mainly for people like me wanting to drive a

Nice work Olaf in sleuthing this out.? I've opted to use the semi-break-in (VOX like!) and the little rig is infinitely nicer to use. I added an LM380 amp to the tail-end of my QCX and I find myself

Can't speak for the OP, but I tried that and no change.

The regulator shouldn't get so hot as to self destruct. I have been running wspr for approx 5 hours with GPS board attached in the middle of summer no problem. I too can't workout how Q1 would be

Yes cannot plug in gps while doing cw, or having antenna disconnected from rig unless in practice mode. As the Ultimate 3S uses a db9 connector for GPS you might consider same. Once the qcx

Steve, Good show. ? Take a look in my photos folder for a picture of my home-made heat sink for the 5 volt regulator chip. ?Standard heatsinks would not fit that particular area. ?They would

Hello Jerry, thank you for suggestion regarding the QSK? click noise.??? Got my QCX? running on 30m band for some days?? and had also to find a kind of sweet spot for the side-tone? level?

Thanks Alan, Thats what I suspected, I will have to provide a connector to disconnect during CW ops. 73 Barry NF1O

Steve, That's great! But are you really sure Q1 got hot on receive? Not just cooling down from an attempt to TX? It should not be possible for it to get hot on receive as the PA should be off. Maybe

Barry If you read section 5.14 of the fine manual. 73 Alan G4ZFQ

I have just been through this with my 20m QCX.? Turns out IC3 had failed (probably after the 5V regulator failed). Even after I replaced the regulator and IC3 (I used a socket this time) it still

Thanks to Jim, Ron, and Michael, for your very helpful suggestions. I am going to get my display going as you suggest, Ron, and then attach the Shield, and make the software changes as suggested by

since the GPS RXD shares a pin with the Dit input, will it not work if GPS is plugged in? it appears that the RXD could make for some interesting CW. thanks Barry NF1O

FIXED IT!? After way too many hours today I finally fixed the problem. It turned out that Q1 had failed. I only found this after replacing Q4, Q5 and Q6 again. After that failed to bring back the TX

Kent, I've used that sketch recently, but not with an Arduino Shield. It's a straightforward demo that works, though. As far as required software changes, you'll find them in this section of the

Finished the 20 meter QCx and found no problems, worked first time. I measure 5,3 Watt output in 52 Ohm load measured with a 2G/s Lecroy oscilloscope ( 47Vpp). Receiver sensitivity 0,1uV / sideband

Looking on the diagrams in the manual I would expect around 4 W (1 dB.low). The voltage drop over the diode, I expected 0.5V not the 0.05 V you wrote. 73 Jan

That demo program does not seem to write to a display.? You change the parameters where it says "Edit ......" and it will run whatever mode you have set.? To change modes, you would edit the section

I $do not$ have that shield but am considered by many to be dangerous around Arduini. The shield instructions say that it is $not$ a complete solution for anything. If you have not already, download

Hi All, I am having ANOTHER senior moment :-((.? I finished my Arduino Shield Rev.2, but I can not for the life of me figure out how to interface with it to be sure that everything is setup