[600MRG] Is this snake oil?

[D.J.J. Ring, Jr.]

https://www.bonito.net/hamradio/en/galvanic-antenna-isolator-gi1000/

The Galvanic Antenna Isolator GI1000 suppresses noise reaching the ground
connections on the receiver. The GI1000 covers a wide-band range of 50 kHz
– 1 GHz (typ. 1,5dB insertion loss). This unit can be used in many
receiving applications, It will also work with frequencies up to 1,25 GHz
but above 1000 MHz insertion loss may increase by up to 3db. The unit also
has integrated double over-voltage protection and input and output are
blocked for DC voltage.

The galvanic isolator GI1000 separates the path of the direct current
between the outer shield of the coax cable and the shielding of the antenna
feeding line in order to suppress interference caused by potential
differences. This is achieved by using a small toroidal transformer. The
inner conductor of the coax cable is insulated with capacitors providing
coarse and fine voltage surge protection.

Close connection please
The GI1000 should be connected to the receiver as closely as possible to
avoid other interference. We offer short very adapter cables with different
connectors.

Galvanischer Antennen Isolator GI1000

GI1000 & CCMC30 a great team
Even a cascaded use of the GI1000 directly at the receiver input and the
CCMC30 following it directly after the coaxial power inserter can in some
cases lead to an increased efficiency. Especially in the lower frequency
range, surprising improvements can occur:

CCMC30 mit G1000 kaskadiert

Galvanic Antenna Isolator GI1000 Specifications:
Excellent protection against sheath waves and voltage surges.Double voltage
surge protection. On the antenna side Gas Discharge tube with an ignition
voltage of 90v. On the receiver side you will find an ESD-diode (30KV;
max.pulse power 350W (8/20μs) Input and output has been blocked for direct
currents of max. 50V.

Tested by Clint Gouveia
The well known DXer Clint Gouveia (Oxford Shortwave Log) is using the GI300
(previous model) on nearly all his DX-Expeditions. He wrote a Test
including Videos. Please ready his tests here: read the test

73

DR
N1EA
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