1. Messages
  2. Raising the "F" layer?

Re: Raising the "F" layer?

Bernie <kf4fhs@...>
 

Tom,

I've come up with a solution to this problem.
I'm now feeding my vertical with 300 ohm ladder line, and impedance matching
is not a problem, because the 50 ohm feedpoint impedance goes into 300 an
even number of times, so matching is not needed. I use one conductor of the
ladder line for transmit and the other conductor for receive. Pretty slick,
eh ?

73, Bernie / KF4FHS

----- Original Message -----
From: "Tom" <tomias@...>
To: <070@...>
Sent: Friday, April 05, 2002 9:55 AM
Subject: Re: [070] Raising the "F" layer?


Hi Bernie,

One important enhancement that has been neglected. Examine your coax to
determine the design characteristics. Should the lettering on the coax
read from the radio to the direction of the antenna, then it is of the
transmitting variety .... lettering reading from the antenna down to the
radio would be the receiving variety ..
although you may use one cable for both functions ... much better to use
one
of each design in parallel to optomize both your transmit and receive
capabilites. There is a down side to this ... It is harder to twist
cables in parallel... you may need a surplus prop pitch motor!

Tom, k3psk

----- Original Message -----
From: "Bernie" <kf4fhs@...>
To: <070@...>
Sent: Friday, April 05, 2002 9:53 AM
Subject: Re: [070] Raising the "F" layer?


OK Guys, I think with your help, I've got my problem worked out.
Now let me see if I've got this right, I mount my rotor upside down,
then
drill the connector and install a cotter pin and crimp the connector
with
vice grips for added security, and always make sure I turn the rotor to
the
right.
Now, as Don pointed out that the natural twist, after a few hours of
operation, will make the antenna circularly polorized, seems to me like
somewhere that I heard that the folks who talk through them satellites
all
use circularly polorized setups, so I'll be able to work PSK31 through
the
Birds. Man, I'm gettin really excited about all this, I can't wait to
get
an
EQSL from the International Space Station !

Thanks & 73,
Bernie / KF4FHS


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