I had two 6BTV's over the years and had good results.
Here at my new QTH, I decided to go stealth and came up with a cheap working setup.
My most heavily used radio is my K2/10. I have others but don't need 100w.
After being a huge skeptic of the 43' fad, I decided to do a little research on them.
I couldn't justify $300+ for some silly simple antenna that couldn't possibly work so I used some wire to try it out first.
A trip to Lowes got me a 500' roll of 14AWG and some 1/8" rope thimbles (tear drop shaped loop protectors).
I was given an 800' roll of RG-6 75ohm coax and all that I needed now was a plastic 4"x4"x3" electrical junction box with RF connections.
In side the box is an MFJ-10-10989D terminated with an SO-239 on the input and two 5-way binding posts for the vertical wire and radials.
Total cost was about $60 to $75. I shot an arrow with spiderwire into a very tall pine tree.
This was used to pull my 1/4" rope and wire vertical.
What have I learned about the 43' antenna fad? If you have tall trees, why spend $300. Also, they do work!
I used the remaining wire for radials. The UNUN makes this antenna DC grounded by default so it is very quiet on RX.
You should have a horizontal antenna to switch to if possible to help "fill in the gaps". (this is for ANY vertical)
Without base loading inductance, expect good 60-10m performance. I do make contacts on 80m with a good bit of loss.
10-15w SSB and 5-8w DATA has netted me contacts world wide.
The best part, no one knows it's there!
go to www.ad5x.com
for some good info including RG-6/PL-259 soldering.