RCU Forums - View Single Post - Broken Receiver Antenna Wire
View Single Post
Old 08-01-2007 | 07:26 AM
  #18  
pettit's Avatar
pettit
My Feedback: (23)
 
Joined: Dec 2001
Posts: 2,769
Likes: 0
Received 1 Like on 1 Post
From: Durham, NC
Default RE: Broken Receiver Antenna Wire

I believe the correct term is "Impedance", not resistance.

The "resistance" of a piece of coaxial cable that is about 10 feet long should be under one ohm.

The characteristic "Impedance" of the coax, derived from inductance and capacitance values, would be 50 ohms, 72 ohms, or whatever it was designed to be.

The one meter long wire on our R/C receivers acts as a "longwire" antenna, and is impedance matched to the RF amplifier in the receiver.

So, to answer the first guy's question, keep the antenna the same length as the original. Find someone else with the same receiver and measure his.

Or, get with the manufacturer and have a new antenna installed.

Radio South can do the very same thing quickly and easily. Google them for address and web site


WA2ROC (licensed continuously since 1959)