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

[David L. Wilson]

> > The transmitter on 137 is an aging valve-type with 25kw output

Matches with ITU record.

> > 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.

Matches with current 85 Hz shift measurements here which also measure
100 Bd data rate.

> > The antenna is a single tower mast about 550 to 600 feet tall

ITU says 106.0.  Assuming this to be meters, that would be about 348
ft.

For those interested, I will upload a description of the USN VLF antenna
site at Cutler, ME (NAA now on 24.0 kHz).   As it has a diagram, it is a
binary file so I will put it at 
http://www.erols.com/dlwilson/naa.gif
as soon as I scan it in.  (Should be there by 4:30 pm Eastern.)
--
David L. Wilson            INTERNET:  dwilson at paprika.mwc.edu
Phone: (540)898-1084 (H)   Amateur callsign: AC4IU  G.S.: FM18fg