AOR GT-1 User guide

GT

-

1

Galvanic Isolation Transformer

GT-1 is an isolation transformer which, when connected
between a receiver and an antenna, greatly reduces local noise
by breaking the ground loop effect between antenna and
receiver. Typical noise sources are switching power supplies,
such as those used for receivers and computers.

Main features:

 Reduce or suppress ground loop induced noise

 Very efficient noise reduction in a PC controlled receiver

environment.

 Great performance in LF and MF bands (40kHz～3MHz)

 Protects the receiver from electrostatic discharges from

the antenna

 40kHz～30MHz Wide band coverage from low frequencies

to shortwave.

Operation principles:

In a city environment where a good quality grounding is not
available for your receiving station, a “ground loop effect” can
occur and greatly affect your listening experience with
unwanted electrical noise. This is particularly true for PC
controlled receivers such as SDR receivers.

The “ground loop effect” occurs when the receiver ground and
antenna ground have different potentials, thus being a major
cause of noise and interference originating from other
electrical equipment such as switching power supplies. This
noise can block the signal you want to receive.

GT-1 Galvanic Isolation Transformer

Operating instructions:

Using the GT-1 is very easy!
Just connect your antenna cable to the GT-1 socket market
“ANT”, and connect the other socket marked “RX” directly to
the antenna input of your receiver. If you lack space behind
your receiver, just use a 10 to 20cm long (non-supplied)
coaxial BNC cable between the receiver and GT-1.
GT-1 will reduce or even suppress “ground loop” induced
noise by trapping the noise before it enters the receiver.
GT-1 is not effective for suppressing noise not caused by the
ground loop effect.

GT-1 will break this ground loop and by Galvanic isolation filter
the noise out of the signal before it reaches the receiver’s
antenna input.

GT-1 circuitry

GT-1 connected to a receiver

SPECIFICATIONS

GT-1 Galvanic Isolation Transformer
Frequency range : 40kHz ～ 30MHz
Insertion loss : Up to 3dB
Input/output impedance : 50Ω unbalanced
Connector type : BNC (F) (receiver side）
: BNC (M) (antenna side)
Sizes (connectors excluded) : 34.5 x 50 x 25mm
Weight : 50g

GT

GT----1 is for RECEIVE ONLY. Do not transmit with it!

1 is for RECEIVE ONLY. Do not transmit with it!

GTGT

1 is for RECEIVE ONLY. Do not transmit with it!1 is for RECEIVE ONLY. Do not transmit with it!

AOR, LTD.

2-6-4 Misuji, Taito-ku, Tokyo 111-0055, Japan

Tel:[phone] Fax:[phone]

www.aorja.com

(June 14, 2012)