Re: WBZ-WBZA

[Garrett Wollman <wollman>]

<<On Fri, 6 Jun 1997 18:11:02 -0400, "Bill O'Neill" <billo@erols.com> said:

> Are they any other synchronous AMs other than LLH left?

There are a number of record in the database marked
``experimental synchronous operation with CITY-NAME-HERE''.  I have no
reason to believe there are actually operating, but then again, some
are very much shown as licenses (with BLEX file number prefixes).  The
are:

WLLZ	KIPA	CMDB	KKOB	KLSQ	KNEW	WAMD
WELX	WJNO	KNUZ	WISO	KEZM	KFEZ	KKMO
WLLH	WBCB	KILE	WMTI	KRVA

Some of these callsigns are probably wrong by now.  I'd sure love to
visit the KIPA sites at Kalaoa, Naalehu, and Hilo... :-)

> xmtr is often not on in daytime.  Not sure why.)  Also, there used to be
> some sort of *device* to help the two xmtrs operated in sync better but it
> was removed.

It's called a ``high-frequency telephone line''.  They're really
expensive, since they have to be what the phone company calls ``dark
copper'', which is to say they have no equipment or connections on
them except at the ends.  (Phone companies don't like this as they
would rather sell you some service you don't need in the middle.)
Nowadays, they could almost certainly do without it and instead
phase-lock both of their transmitters to GPS receivers with
high-stability oscillators to get the same sort of accuracy.  Both are
probably more than their budget allows...

- -GAWollman

- --
Garrett A. Wollman   | O Siem / We are all family / O Siem / We're all the same
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MIT, LCS, CRS, or NSA|                     - Susan Aglukark and Chad Irschick

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