On Mon, 4 Sep 2006 00:45:07 -0400, "Jimmie D"
wrote:

I am trying to build a 20meter 1/2wl end fed vertcal antena and havent had a
lot of success. The antenna is for use at maximum legal power so I need
componets in the network that will hold up. I have tried a J pole
configuration that I never was able to properly tune and I have tried lump
sum LC values that melted down with max power. I guess the last way is
doable but not unless I want to spend really big bucks on new HV capacitors.
I was thinking about the matching section on my Ringo Ranger. Why not just
scale this up for 20M? The mechanics of it arent a real problem, I can
fabricate most anything I would need. Seems like I've heard the mast for a
Ringo needs to be at least a 1/4 wl long, is this true?


You might want to consider this approach.

http://k6mhe.com/files/DualBandVert.pdf

Danny, K6MHE

That is EXACTLY what I tried less the relays. Problem is I dont have good
enough caps for full power and probably will not get any. I am trying to
make do with what I have. It worked fine with 100 watts. I am considering
lengthening the antenna to 5/8 wl. This should give me a lot less voltage at
the feedpoint and I shouldnt even need a capacitor. I did like the idea of
dual band antenna .

"Danny Richardson" wrote in message
...
On Mon, 4 Sep 2006 00:45:07 -0400, "Jimmie D"
wrote:

I am trying to build a 20meter 1/2wl end fed vertcal antena and havent had
a
lot of success. The antenna is for use at maximum legal power so I need
componets in the network that will hold up. I have tried a J pole
configuration that I never was able to properly tune and I have tried lump
sum LC values that melted down with max power. I guess the last way is
doable but not unless I want to spend really big bucks on new HV
capacitors.
I was thinking about the matching section on my Ringo Ranger. Why not just
scale this up for 20M? The mechanics of it arent a real problem, I can
fabricate most anything I would need. Seems like I've heard the mast for a
Ringo needs to be at least a 1/4 wl long, is this true?


You might want to consider this approach.

http://k6mhe.com/files/DualBandVert.pdf

Danny, K6MHE