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Milnet.ca => Communications & Electronics => Topic started by: Evocatus on March 13, 2015, 13:47:26

Title: AN/PRC-522 Manpack long wire antenna ?
Post by: Evocatus on March 13, 2015, 13:47:26
Old signallers and old para signallers in particular will recall the home made modified long wire antenna modification that we used to use with the AN/PRC-25 Set and later it's cousin the AN/PRC-77 Set, to extend the range, by either:
  a. tossing it up into the trees to jack it up 2-30 ft vertical; or
  b. employing as a long wire, extended along the ground, in the desired direction of propagation.

It, simply worked wonders, increasing range.

As a retired signaller, I recall as the IRIS/TCCCS AN/PRC-522 Manpack, replaced the 77 Set, it was neigh impossible to 'make' a similiar long wire for the 522, as there were " impedance issues " [not experienced with the ancient 77 set].

Question: has anyone since come up with a way to att a home made long wire to the 522 overcoming said aforementioned issue ?

Much Thx.     V.V.V.
 
Title: Re: AN/PRC-522 Manpack long wire antenna ?
Post by: Evocatus on March 16, 2015, 15:48:19
Apparently it's the same drill; use a coax, stripping away the braided shielding, to bare the center conductor to 1/4 wavelength [freq X 234], including accommodation for a loop at the end [for lanyard to hoist up].

Leave the BNC connector on the radio end and hook it up.

One cannot connect the radio end to the AN/PRC-522 [like we did to the 77 set] as it will balk at the 'home made' antenna, not recognize it as legit and thus you can hit the presso swt all you want.....nothing.

problem very simply solved.
Title: Re: AN/PRC-522 Manpack long wire antenna ?
Post by: 211RadOp on March 17, 2015, 11:40:14
... 1/4 wavelength [freq X 234], ...

234/freq in MHz
Title: Re: AN/PRC-522 Manpack long wire antenna ?
Post by: Pre-flight on March 18, 2015, 20:14:12
234/freq in MHz

Those of us in the civilized world use the λ(m)=300/ƒ(MHz)

Much cleaner, 1/2 wave is 150/ƒ, 1/4 wave is 75/ƒ

Plus metric is what you need to use if you are going to start to delve into the science of radio.