Re: [IRCA] Now that's a ground system! (OT)

[AM-DXer@xxxxxxxxx (Patrick Griffith, N0NNK / WPE9HVW)]

Very correct Charlie. DC interties are also very common in Japan where
the western half of the country is mostly 60 hz AC while the eastern
half is mostly 50 hz AC. Direct AC interties would be impossible. DC
interties are also useful for long submarine runs where AC is plagued by
high capacitance resulting in high loss and phase shifts. The 115 km
England-Isle of Man submarine intertie is an exception. It is AC with a
capacity of 40 mw at 90 kv. The England-France submarine intertie is DC
with a capacity of 2,000 mw. And the proposed 750 km Norway-UK submarine
intertie was to have a capacity of 1,200 mw. Vancouver Island has two
submarine high voltage DC interties. One has been in operation since
1968 and has a capacity of 312 mw at 260 kv. The other went into
operation in 1977 with 370 mw at 280 kv.

By the way, every resource that I've seen indicates that Cuba uses a 60
hz distribution system - not the 50 hz that I have seen mentioned here
on numerous occasions in relation to the warbler. Even the WRTH lists
Cuba as 60 hz.

Patrick Griffith, Westminster CO
Broadcast Technician
NRC Broadcasting - Denver
http://community.webtv.net/N0NNK/
http://community.webtv.net/AM-DXer/

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