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TRM Transmitter 
Videos
The use of the GDD time domain IP transmitter(s) with the GDD TRM
allows to work in IP frequency domain, time domain (adjustable timing)
and Pulse EM for very large loops (field tested with a 16 km loop using
small gage wire).
Field tests have shown that it is possible to send close to 10 A in
a 16 km loop since the transmitter allows the use of high voltage
taps to adjust to the high resistance from the wire. This system has been
developed and used successfully for deep Pulse EM surveys by the largest
Canadian producer of nickel in the Sudbury region.
A new and improved version of the TRM and GDD IP transmitter system will
be introduced later in 2007. See the video #1 down the page.
2 GDD transmitters with 2 GDD TRM send up in the ground up to 4800V and
10A while synchronization is done by Geonic transmitter, Crone, Zonge.
OEM, Smart5, or any other compatible transmitter.
Figure 1 on top- Configuration diagram of two GDD IP transmitter
with two GDD
TRM with OEM transmitter (Geonics orange Tx) for Pulse EM or Frequency
Domain
(electrodes). This configuration allows to send up to 7200W - 4800V
with a maximum of 10A.
To view Video #1
showing the describe configuration in Figure 2
(3 MB, 1:14 min.)
click here >>>
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Figure 2 on left:
Configuration to be used for Pulse EM (for surface loop) or Frequency
Domain
(electrodes) in combination with an OEM transmitter
allow to send up to
7200W - 4800V with a
maximum of 10A.
The use of the OEM
allows to define the frequency to be used and to synchronize the
OEM transmitter with the OEM receiver (crystal or use of GPS for
timing).
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Figure 3: One can use one or two GDD transmitters with one or
two TRM
depending of the voltage requirements for the time domain or frequency
domain IP survey. The configuration shown explain how to join the
cables,etc for two GDD 3600W or 5000W with two GDD TRM to enable to
send up to
7200W-4800V-10A and 10,000W-4800V-10A respectively.
The modified version of the Pulse EM transmitter to be introduced
in 2007
will enable to increase the current from 10A to 20A and possibly
60A in certain conditions. This new GDD system being developed jointly
with the biggest Canadian producer of nickel will likely be field tested
early this spring 2007 around Sudbury to help tracking nickel ore up
to a depth of 3000 meters or 10,000 feet.
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