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Antenna Tuner

Jun 5th, 14:44

KB3FFH

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
What is the difference between a remote tuner at base of tree ( AH-4) and a tuner at the radio ( AT-Auto). Other than 75' of fg-213 cable loss ? This is for an OCF dipole Thanks
Jun 5th, 15:11

W1VT

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0

If the SWR is low, the difference is negligible. If the SWR is high, you can get a significant increase in transmit signal by putting the remote tuner closer to the antenna feedpoint.

This can be calculated, if you know the SWR somewhere and the cable type(s) with TLW, Transmission Line for Windows Program that comes with the ARRL Antenna Book.

A similar program to TLW is Transmission Line details
http://www.ac6la.com/tldetails1.html


Zack Lau W1VT
ARRL Senior Lab Engineer

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