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Tripple-P 70-cm Repeater used on oil platforms
By Frans van Venrooij, PA0VRO
Some time ago the museum acquired a large number of 70-cm repeaters that had served for data connections between oil platforms and the mainland. These rigs are all custom-built to KPN specs (Royal Dutch Telecom) by Dutch manufacturer Tripple-P. As the equipment was used on a frequency adjacent to our 70-cm, they are easily converted for amateur use.
Font view (click to enlarge)

 
Introduction
The rig is housed in a very robust 19" rackmount case, with an aluminium front plate. Inside the case are the highly accessible transmitter, receiver and (in some cases) a duplex filter. As the transmitter and receiver are both 'made in Holland', they consist mainly of standard high-quality components.

The repeater was most likely used to relay data signals and possibly voice data as well. Although it is theoretically possible to convert this rig into a fully-featured 70-cm transceiver, such is not advisable due to the high cost involved. The rig doesn't have a microphone connection, nor a speaker output, display and control panel.

It would be best to use this rig for the purpose it was designed for: as a 70-cm repeater. At the rear, two serial ports are available. One of these ports can be used to connect a standard PC in order to upload new software for the internal processor.
 
Top view (enlarge)
  
Borrom view (enlarge)
   These images show the rig with the top and bottom lids removed. Click the images for an enlargement.

The rig is beautifully crafted as we can clearly see in the close-ups.
 
More information
More information is not (yet) available. The rigs can be ordered from the museum in the usual manner. Shipping them via mail should be considered inefficient, due to their high weight. The rigs can be collected at the museum site or on one of the many radio fleemarkets where the museum has a stand.
 
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© Copyright Museum Jan Corver Last changed: Last changed: Sunday, 31 December 2006 - 10:06 CET.