I usually don't post but your topic for backpacking caught my eye. I am a 2021 Appalachian Trail Thru-Hiker, completed all 2,002 miles including the approach trail from Springer Mountain in Georgia. I

#qdx

I was out for a POTA activity today at Harriman State Park in NY. I was using my QCX-20M and an EFHW antenna thrown up in a tree about 20 feet and worked seven (7) European stations. Most gave me an R

My thanks to all valuable comments and thoughts. I will have to research Mel's PAC-12 vertical. My EFHW has done a Youmans job in the field. I just like to look at alternatives to throwing a line up i

Has anyone used the Elecraft AX2 portable antenna on their QCX for field operations? I am looking for an alternative for EFHW wire antennas. I'm interested in comments for any portable whip antenna, A

Chuck, I'll check that out ant let you know what happens. Thanks for your suggestion.

Mike, I have RG-213U feeding an OCF Dipole up about 25-Ft. The feed line goes into a lighting arrestor then to my LDG YT-1200 Automatic Antenna Tuner. From the tuner I feed a one-meter piece of RG-8X

With a dummy load on it sounds normal. I would suspect a common mode issue on the antenna leads but my QCX-40M rig sounds normal with the AGC on. My main rig is a Yasue FT-450D and there is no issues

Thanks Tony. My volume is set to 17. Just for kicks I tried setting it to 7, and still had the same result.

I have read several topics about this on this forum regarding harsh sidetone and relating to RF feeding back to speaker. But in my case when I turn the AGC off the harsh side tone goes away. I have a

To All, Many thanks for your very helpful suggestions. After understanding the schematic diagram flow from IC2 to Display, (and general circuit labeling, thanks KM6WT) I conducted the continuity check

Ron, Good afternoon. I have verified the problem is on the main board. I was able to swap out the new display and new microcontroller to my working 40M rig. The display worked, and the microcontroller

Ron thanks for your reply. Yes, I did see +5VDC on pin #20. I will check tomorrow for continuity as you suggest. I'll post again with my results.

I have just completed my second QCX-Mini this one for 20M. Upon power up the display was one (1) row of blocks. In looking at the troubleshooting procedures by Ron WA7GIL, item #2 IC2 may not be getti

Ron and George, Thanks for you for thoughtful input. I do not have a GPS. Setting the ref freq. at 27,0047,036 worked. If I may ask, what is the math you used to calculate the new ref. freq.?

#40m

I have just completed my QCX Mini Build for 40M. The RX and TX Freq seem to be off by about 80Hz. For example, I TX on 7.115.20 and RBN says I'm at 7116.00. The delta is consistent no matter where I g

#40m

Many thanks to Mike and Ron for their replies. I was under a preconceived notion that the RF output was a permanent reading, as I thought I saw that on my many hours of You Tube viewing. That obviousl

First, I enjoy building kits. I have taken a 34 year hiatus from Ham Radio. I have come back as I am retired. When I was an active OP I was into QRP. I recently bought and built the QCX Mini 40 Meter

Thanks Tony. Yes I am very aware to take extreme care to remove T1.

Alexander, I did not think it would matter but wanted to get the opinion of others. Thanks for the tip to wind tight and close to each other.

Julian, Understood. Thanks for the useful tip.