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COMANT VOR/LOC/GS ANTENNA CI-157P

$365.00/Each
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Part# 11-15700
MFR Model# CI-157P

Overview

Frequency 108-118 MHz (VOR/LOC) 329-335 MHz (Glide Slope)

"V" dipole VOR/ Glide Slope antenna with fixed elements designed specifically for compatibility with the Piper Aircraft mounting. Integral ferrite balun provides for higher radiation efficiency replacing cumbersome coaxial baluns previously utilized. Radiating elements are not removable.

Note: Comant Antennas no longer come with a gasket or a template. Must order PN 09-05579 separately.

Not approved for helicopter installations.

Applications
Single engine piston aircraft for applications of this antenna design. Consult your FBO or installation shop for best application information.

Specifications

MODEL CI 157P V-DIPOLE
Electrical
Frequency

108-118 MHz (VOR / LOC)
329-335 MHz (Glide Slope)

VSWR
3.0:1 108-118 MHz (VOR / LOC)
3.0:1 329-335 MHz (Glide Slope)
Polarization
Horizontal
Radiation Pattern
Dipole
Impedance
50 Ohms Nominal
Power
Receive Only
Mechanical
Weight
0.5 lb Maximum
Height
18.00 in. Maximum
Material
Derlin Housing / Stainless Whips
Finish
Black Housing / Stainless Whips
Connector
BNC
Environmental
Temperature
330 KIAS Maximum @ Sea Level
Altitude
4.2 Oz. Maximum
Air Speed
DO-160D
Federal Specifications
RTCA Environmental
DO-160C
FAA TSO
C34c, C38c, C40c
FAA MOPS
DO-192, DO-195, DO-196

Dimensions

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Reviews

Many comments suggests that these antenna is not a direct replacement. These comments are misleading. On a cherokee, the antenna mounts on a bracket that acts as the aft to holes the attach the rudder cap on each side. Depending on the beacon installed, you cannot move this bracket forward. The antenna will mount directly to the bracket without issue. If clearance for the BNC RF connector is a problem, that can easily be eliminated using either a 90 degree adapter or a 90 degree BNC termination. The comments suggesting a connection issue are also misleading. Some of the older aircraft use a nav dipole antenna with screw terminals that also require an external tuned balun. This balun is a short piece of coax loop placed between the dipoles to provide a quarter wave transformer between the elements. This antenna has an internal balun. To install this antenna as a retrofit, you will need to cut the coax to the nav receiver, remove the balun, install a BNC termination on the coax running forward, then connect to the antenna. This antenna will fit PA28s without problem.

Chris
June 30, 2020

A perfect fit in my vintage Mooney- bolt patten is correct and there is plenty of clearance for coax and connector with no modifications necessary. Mounted with BNC facing up and antennas facing forward.

Dave
March 3, 2019

Had to purchase this bc mine broke. When they manufactured it the drilled a hole that wasnât centered for the roll pin that goes the the antenna wire itself. Vibration eventually broke it. I called the manufacturer direct and left several messages and no reply. I guess when you selling $357.00 cost hangers, you donât have to answer to nobody!

Wayne
May 20, 2019

NOT a drop-in fit for Piper models as designed. BNC connector to vert tail cap interference. HOWEVER, flipping the assembly upside down (BNC on bottom) works with the following modifications: bore whole in metal antenna bracket for BNC connector (~3/4 dia.), increase antenna cutout on each side to accommodate offset Whiskers Bought the antenna knowing about this.

Jan P
June 2, 2017

This antenna is supposed to be a direct replacement for Piper PA/28 however with the BNC connector mounted on top of the antenna, it does not provide for adequate clearance to your rudder balance weight. It will make contact. Now you can mount this antenna anyway you like BNC connector facing down. Whips facing aft. Cut additional room in your fairing to accommodate this type of installation, as the whips are offset. BNC connector down whips facing forward you will be ok although I have heard some say this type of installation causes a weak reception. Others say works fine. For me I fabricated a new mount plate and moved the antenna forward to position the BNC connector directly under my strobe light and replaced my fairing. It was an old plastic type and very brittle. So in the end antenna works fine with a few modifications and a fairing replacement if you do not want a big cut out on each side of your fairing.

Terry B
August 11, 2016

Does not fit into an Arrow III without modifying fairings and mounting. Literature is misleading.

Brian K
April 18, 2019

Q&A

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