[Lf] [Fwd: re CFH details...from the horses mouth.]

[Andre' Kesteloot]

Alan Melia wrote:

> Hi Andre' my contact Jon sent the following....I think Ken may have been
> being a little optimistic.
> --------------------------
> The transmitter on 137 is an aging valve-type with 25kw output
> potential.  It is generally run at 8 to 9 kw output because of antenna
> restrictions.  This equates to somewhere between 30 and 40 amps of RF to
> the antenna.  FSK tones are +/- 42.5 Hz.
> The antenna is a single tower mast about 550 to 600 feet tall
> (dimensions estimated because I could not find the engineering drawings
> today)  It has capacitive top loading: the six guy wires attached to the
> top of the tower are broken up by insulators about 25% of the way down
> (diagonaly along the guy) from the top.  At this point there is another
> steel cable which goes around as a ring linking the six insulators
> (actually connected above the insulator, electrically bonded to the top
> part of the guys).  There are an additional 6 cables that connect from the
> top of the tower to the ring cable, to "fill in" the spaces between the
> guy cables.  It looks a bit like an umbrella without the cloth, the ring
> cable would be the outer edge of the umbrella's cloth.
> The counterpoise is made from radial steel cables which are buried
> so I don't know exactly how long they are, but I am sure no expense was
> spared during installation.
> Jon VE1FTL
> --------------------------------------
>
> Hope that helps a bit
> Cheers de Alan G3NYK  JO02PB
> Alan.Melia at btinternet.com