"Thomas & Karen Mitchell" kg7uATolympus.net wrote in message
...
(I realize that a through-the-glass antenna is less than ideal.
Nevertheless, that's what I have to use in my situation.) The one I
have is for 2 meters (NOT dual band), and the label says up to 50
watts. I have an Icom IC-2200H, which has a maximum of 65 watts
output.

What bad things may/could/will happen if I put 65 watts through the
antenna?

Thanks!

Tom Mitchell -- KG7U
Port Angeles, Washington. USA
--------------------------------------------------------------------------
Tom Mitchell, Port Angeles, Washington, USA
http://www.olympus.net/personal/kg7u
--------------------------------------------------------------------------

Tom

Through glass antennas work using capacitance. The two plates either side of
the glass form the capacitance with the glass acting as the insulator.
Attempting to put too much power through a capacitor usually results in
overheating or a breakdown of the insulator. This could potentially result
in a broken screen.

Another thing to consider is the mismatch that the through glass capacitor
makes with your transmitter. Some of the power will inevitably be reflected
back to the output stages causing possible overheating at full power.

I would guess that 65 watts would be safe enough for brief transmissions but
for longer chats keep the power down below 50 watts. For mobile use, the
difference in signal strength, a fraction of an S-point, is unlikely to be
noticed by anyone receiving your signal.

Mike G0ULI

"Mike Kaliski" wrote in message
...

"Thomas & Karen Mitchell" kg7uATolympus.net wrote in message
...
(I realize that a through-the-glass antenna is less than ideal.
Nevertheless, that's what I have to use in my situation.) The one I
have is for 2 meters (NOT dual band), and the label says up to 50
watts. I have an Icom IC-2200H, which has a maximum of 65 watts
output.

What bad things may/could/will happen if I put 65 watts through the
antenna?

Thanks!

Tom Mitchell -- KG7U
Port Angeles, Washington. USA
--------------------------------------------------------------------------
Tom Mitchell, Port Angeles, Washington, USA
http://www.olympus.net/personal/kg7u
--------------------------------------------------------------------------

Tom

Through glass antennas work using capacitance. The two plates either side
of
the glass form the capacitance with the glass acting as the insulator.
Attempting to put too much power through a capacitor usually results in
overheating or a breakdown of the insulator. This could potentially result
in a broken screen.

Another thing to consider is the mismatch that the through glass capacitor
makes with your transmitter. Some of the power will inevitably be
reflected
back to the output stages causing possible overheating at full power.

I would guess that 65 watts would be safe enough for brief transmissions
but
for longer chats keep the power down below 50 watts. For mobile use, the
difference in signal strength, a fraction of an S-point, is unlikely to be
noticed by anyone receiving your signal.

Mike G0ULI



My friend has a 71 Dodge Charger, He used one because he didnt want to drill
any holes in this classic muscle car. He made the mistake of running about
200 wats to the antenna and it caused the plastic sheet in the saftey glas
to delaminate.. He has a big white spot on the edge of his rear window now.
I have run one without any damage to the window but I got a lot of picket
fencing with it. Didnt keep it for long.

Unless you are talking about a classic car drilling a hole in the roof
doesnt effect resell valure

Jimmie