Text 15476, 73 rader
Skriven 2019-06-14 20:56:00 av Ed Vance (9584.fi_ham)
  Kommentar till text 15473 av mark lewis (1:3634/12.73)
Ärende: Re: building an antenna
===============================
06-13-19 15:16 mark lewis wrote to all about building an antenna
Howdy! Mark,

 ml> @MSGID: <5D02D5B5.9581.fi_ham@capitolcityonline.net>

 ml> this is somewhat on the topic of HAM but the actual use is not... i
 ml> don't know where to look for the information i'm seeking...

 ml> here's the scenario:

 ml> i need to make an external UHF HD antenna...
 ml> i do not have any funds available...
 ml> i found plans for a UHF antenna online and printed them out...
-BIG SNIP-

I started reading Your message and after TEN Lines I decided to tell You
how I made a UHF TV Antenna.

I used a piece of 300 Ohm Twin Line cable to make a Folded Dipole Antenna

a bit over 26 Centimeters long for UHF Channel 32 back in the 1960's.

Channel 32 had just come on the Air and it's Transmitter was about 4 miles
from where I lived.

We bought a UHF to VHF Tuner for the upstairs VHF TV Set, and needed a 
antenna up there, I knew enough to make a antenna by looking in some
books for Charts and Formulas and made it.

Channel 32 uses the Band of Frequencies from 578 Mc. to 584 Mc. 

  |<---------------------- 26 CM ------------------------>| = 1/2 wave length

  ---------------------------------------------------------
  |                                                       |
  --------------------------  -----------------------------
                           |  |
                           |  |
                           |  |       Another piece of 300 Ohm Twinline
                           |  |   <-- to Antenna Terminals on UHF Tuner


I stripped the wires on each end and soldered them together.

I folded the cable end to end to find the center,

then I cut one of the wires at the center,

and attached another piece of 300 Ohm Twin Line to each of the center wires
for a feed line to the UHF Tuner.

I taped the Home Brew "Antenna" to the wall.

It worked!

You could use a 2 pieces of PVC pipe and a TEE to enclose the Folded Dipole
or DUCT TAPE the antenna to a board, to make it an External Antenna.


<<<<<<<<<<<<<<< BRAGGING MODE ON  >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

I told a neighbor about the antenna I made and was asked if I would make
one for them, so I went to the Wire Box, grabbed a length of 300 Ohm Twin
Lead, put it together and fastened it to the neighbors UHF Tuner.

>>>>>>>>>>>>>>>>>>>>>>  BRAGGING MODE OFF <<<<<<<<<<<<<<<<<<<<<<<<<<<<<

73 de Ed W9ODR          .             .


... Have you checked your smoke detector batteries & Fire Ext, LATELY?!
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