ADF antenna

What is the proper length?
Since my old one departed in flight, I have nothing to measure the new one
against.
--
Dan
C172RG at BFM

On Wed, 13 Aug 2003 12:24:41 -0500, "Dan Luke"
c172rgATbellsouthDOTnet wrote:

What is the proper length?
Since my old one departed in flight, I have nothing to measure the new one
against.

Depends on the ADF. I have an installation manual for the Cessna ARC
R546? which shows the correct length of the sense antenna from top of
wing to the insulator. You can by a new stainless steel sense wire kit
from Chief and others.

MikeM

It is pretty loose. The AGC makes up for a multitude of length errors. I
generally start out at 72" and go from there. Always worked for me.

Jim



mikem
shared these priceless pearls of wisdom:

-On Wed, 13 Aug 2003 12:24:41 -0500, "Dan Luke"
-c172rgATbellsouthDOTnet wrote:
-
-What is the proper length?
-Since my old one departed in flight, I have nothing to measure the new one
-against.
-
-Depends on the ADF. I have an installation manual for the Cessna ARC
-R546? which shows the correct length of the sense antenna from top of
-wing to the insulator. You can by a new stainless steel sense wire kit
-from Chief and others.
-
-MikeM

Jim Weir (A&P/IA, CFI, & other good alphabet soup)
VP Eng RST Pres. Cyberchapter EAA Tech. Counselor
http://www.rst-engr.com

"Dan Luke" wrote in message ...

Why does it depend on the ADF? Wouldn't it be some fraction of an
average wavelength for NDB frequencies?

It's a very tiny fraction of teh NDB frequency wavelength, which is over
200 meters. The radio has to have some internal matching for the
much shortened length.