View Single Post
  #17   Report Post  
Old August 16th 04, 06:50 PM
SpamHog
 
Posts: n/a
Default

Cecil,

10W out of the antenna or 10W out of the transmitter? With a
T2FD, there is a very large difference on certain frequencies.


Out of the TX. I know that the lower you go, the warmer the pigeon
sitting on the resistor will get.

I tested the small neons I have. I basically found two types, one that
clips at 60V, the other at 110V. I made a classic 4:1 balun and
soldered one 60V between each balanced arm and common. I know it's
like wearing suspenders and belt, but I don't think they will hurt at
under 10W.


Also, in view of what I read, I understand Richard's claim that a T2FD
will snuff out much of the energy anyway:

- if the spectrum of the AC induced by a near hit is mostly in the LF
to MF range, the resistor will indeed take most of the heat, just as
if the power were coming from the coax

- moreover, as I sized the windings for 4MHz and up, the balun itself
will short to ground much of the leftover energy it does receive from
a near hit.