Home |
Search |
Today's Posts |
#11
![]() |
|||
|
|||
![]()
PatW wrote:
Also remember that a terminated rhombic has 50% loss, about the same as the B&W. But, unlike the B&W, that loss is in only one direction which turns the rhombic into an effective directional beam. -- 73, Cecil http://www.qsl.net/w5dxp -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1 Newsgroup Service in the World! -----== Over 100,000 Newsgroups - 19 Different Servers! =----- |
#12
![]() |
|||
|
|||
![]() "PatW" wrote in message m... Also remember that a terminated rhombic has 50% loss, about the same as the B&W. Pat W0OPW If GAIN - LOSS 0 you still come out ahead. Tam/WB2TT |
#13
![]() |
|||
|
|||
![]()
Try this: a 16 Ohm resistor in series with each side of the dipole, and a
100 Ohm resistor across the feedpoint. Unless I messed up, this will give you SWR = 2:1 for all conditions including shorted, and absent dipoles. Thanks Tam, This is exactly what I was looking for. A dummy load is 0% efficient. A B&W dipole is less than 20% on 80m and 160m. It costs a lot of money. There are less expensive ways to achieve 20% efficiency on 160m and 80m. 0% does not radiate (dummy load), a good bad antenna in my opinion is one that radiates, but not too much. And it can't cost too much. 73 Gary N4AST |
#14
![]() |
|||
|
|||
![]()
Try this: a 16 Ohm resistor in series with each side of the dipole, and a
100 Ohm resistor across the feedpoint. Unless I messed up, this will give you SWR = 2:1 for all conditions including shorted, and absent dipoles. Tam/WB2TT ======================== There's no need to mess about with the antenna. Just connect a crude attenuator at the transmitter end of the transmission line. This much reduces the cost of the antenna. It's then just a length of wire. |
Reply |
|
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Forum | |||
Inverted ground plane antenna: compared with normal GP and low dipole. | Antenna | |||
FS: Connectors, Antennas, Meters, Mounts, etc. | Antenna | |||
Poor quality low + High TV channels? How much dB in Preamp? | Antenna | |||
QST Article: An Easy to Build, Dual-Band Collinear Antenna | Antenna | |||
Are fractal antennas being used in cellphones? | Antenna |