Doug wrote:
"Peter Bennett" wrote in message
news.com...

On Mon, 23 May 2005 11:24:44 -0400, Jon Gauthier
wrote:


I haven't fired up EZNEC yet, but I was wondering how a standard 3dBi
marine whip would perform on the 2m ham bands. Since the marine
frequencies are 156.050-157.425 MHz, what could I expect at 144-148 MHz?

If it won't cut it, then does anyone have any recommendations for a
dual-band antenna (commercial or home-built)?

Jon

I've used a 2m antenna on the marine band with a marine hand-held,
with no apparent problems - it gives much better performance than the
hand-held's "rubber duck". (but I didn't check SWR)




My portable antenna for both marine and aviation use on 2 meter ham band for
a non-permanent install is to strip back 1/4 wavelength of coaxial cable
outer insulation, then push the braid back over the cable so I have 1/4
wavelength of coax center lead exposed and 1/4 wavelength of braid back over
the insulated portion of the cable, forming a sleeve dipole, then attach the
matching portable radio antenna connector on the other end. Fishing leader,
etc can be used to hang the antenna from an overhead supp-ort on the boat, a
tree limb when camping, etc. I Have used removable masking tape to tape the
antenna to the Plexiglas window in a rental airplane, etc. Works great. SWR
can be trimmed by starting long and working back to about 19 inches of braid
and center lead.
73
Doug K7ABX



I have the WAF to think about ;-)

Peter - I was asking the other way around - using my 2m ham radio
connected to the marine VHF antenna. I guess if the SWR is less than
something like 5:1, my Icom 706 won't shutdown...

Jon KB1HTW