Home |
Search |
Today's Posts |
#13
![]() |
|||
|
|||
![]()
I should have pointed out, a T-Match requires a dipole, a few seem to
miss I had previously noted this is a monopole in question... a T-Match would unbalance the RF RADIATION PATTERN of a dipole in the same way a gamma does a monopole, there would be no gain from using a T-Match in place of a gamma, EVEN if it could be done here... I suppose you might be able to mount the bottom of T-Match on the mast holding the monopole--but then, that is another experiment for another day... Warmest regards, John "John Smith" wrote in message ... Dale: Yes, someone injected a T-Match in here, but no real interest in a T-Match... Warmest regards, John "Dale Parfitt" wrote in message news:ODOne.7695$vK5.2782@trnddc03... "Dave Platt" wrote in message ... In article tJLne.13595$Vm4.9195@trnddc01, Dale Parfitt wrote: How can a T match have show a bias- it is balanced. Virtually all the serious EME arrays use this matching technique and show the major lobe dead off the front. Are they feeding directly off of the coax, or do they use a halfwave (or other) balun between the coax and the T? Check out any of the antenna handbooks for a Tee match. The driven element is insulated from the boom and split in the middle. Each side of the Tee taps out on the D.E. at a point yielding a 200 Ohm balanced feed. A 4:1 coaxial balun is used to transform the 200 Ohms balanced down to 50 Ohms unbalanced. Dale W4OP |
Thread Tools | Search this Thread |
Display Modes | |
|
|