Thanks so much! This is very, very helpful! You have given me a lot of homework. I will try the following and report back.
- Install air choke at matchbox (20ft RG8X wrapped tightly around a plastic jar).
- Attach counterpoise wire to ground lug of matchbox (I wonder why you specified 16.5ft. My math gives 17.5ft for 1/4 wave at 14074 KHz. I'll start with 17.5 and trim back). I'll leave the counterpoise dangling to start and then find a way to hide it.
- Disassemble the uBITX and grind off the paint around the standoff and antenna holes and reassemble (no star washers in my junk box).
I'll leave the counterpoise-on-radio and antenna mods (shorten wire length to match table or use new matchbox with longer wire) for phase two.
73 Mike KK7ER