"Alex V Flinsch" wrote in message
news
On or about Sat, 12 Jul 2003 18:03:59 -0500, "Jason Dugas"
wrote about the following in article
:

Hello all,

I have a 6m transverter on the way this week to use just in time for
the
CQWW contest this weekend... one problem NO ANTENNA!!

So I picked up a very old Yagi, built in 1969, but still in great
condition.
Its currently cut for the 40 MHz band, so I should be able to trim the
elements down and change the spacing for a 3-element 6m antenna, right?

At any rate, the information I have been able to find so far (from
various
Yagi calculators found online such as that found at
http://www.csgnetwork.com/antennae3ycalc.html) give the following
figures:

Calculated Driven Side Element Length 4'6 19/32"
Calculated Total Driven Length 9'1 6/32"
Calculated Reflector Length 9'7 5/8"
Calculated Element Spacing 3'7 7/32"
Calculated Director Length 8'6 23/32"

Here are my questions:
1. Can I do this? Cut the elements, change the spacing.

Are you sure that it is cut for 40 MHz, and not 40 meters? What service
uses 40 MHz anyway?

Alex -

40 MHz is within the "Land Mobile" allocation (low band VHF - within 30 to
50 MHz),
which has existed at least since the 1940s (post World War 2).

Here is the NTIA - U.S. Frequency Allocation Chart
http://www.ntia.doc.gov/osmhome/allochrt.html

My father had a commercial radio system at 46 MHz from 1957 to 1990.
The Illinois State Police used 42.xx MHz for their District office stations
for over 50 years
and many of their mobiles (long whip antennas) well into the 1980s and 1990s

Greg
w9gb