These are not the most effecient, and depending on
the
glass, you may find that there is some metalic
content in the glass, makeing a perfect match
impossible. Think was a pic, in QST couple months
ago of one (struck by lightning), showed the
fractured glass. But, the difference between
50 and 65 watts is very little in the scheme of
things, Maybe 1 Db. Most likely would make little
difference- the METAL CONTENT of the glass, would
make more difference , as the loss would be heat!
Jim NN7K

Thomas & Karen Mitchell wrote:
(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
--------------------------------------------------------------------------

Thanks to one and all. The Icom IC-2200H doesn't have a choice of 50
watts output; it goes from 25 to 65.

So: I'll stay at 25 when in the car.

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

Thomas & Karen Mitchell wrote:

...
So: I'll stay at 25 when in the car.

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

Every engineer, worth his pay, which I know, allow at least a 20% excess
on ratings.

50 X 20% = 10 watts

50 + 10 = 60 watts

I'd run the 65 and examine the glass mount now and then. You'll see if
damage begins and switch lower power.

Warm regards,
JS

John Smith I wrote:
Thomas & Karen Mitchell wrote:

...

So: I'll stay at 25 when in the car.

-- KG7U
--------------------------------------------------------------------------

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



Every engineer, worth his pay, which I know, allow at least a 20% excess
on ratings.

50 X 20% = 10 watts

50 + 10 = 60 watts

I'd run the 65 and examine the glass mount now and then. You'll see if
damage begins and switch lower power.

Warm regards,
JS

Obviously the engineers who established the maximum power
specification would not advocate using greater than 50 watts.

ac6xg

Jim Kelley wrote:

...
Obviously the engineers who established the maximum power specification
would not advocate using greater than 50 watts.

ac6xg

1) No engineer would advocate over-clocking computers the way I do.
2) No engineer would advocate pushing rigs and liners (power amps) to
the limits I do.
3) No engineer would advocate doing the mods to equipment I do.
4) No engineer would advocate the antenna experiments I carry out.
6) No engineer would advocate the engine mods to my vette which I have done.
7) No engineer would advocate the levels of exposure to RF I expose
myself too.
8) ...

That's what makes it fun, now doesn't it?

JS

John Smith I wrote:


1) No engineer would advocate over-clocking computers the way I do.
2) No engineer would advocate pushing rigs and liners (power amps) to
the limits I do.
3) No engineer would advocate doing the mods to equipment I do.
4) No engineer would advocate the antenna experiments I carry out.
6) No engineer would advocate the engine mods to my vette which I have
done.
7) No engineer would advocate the levels of exposure to RF I expose
myself too.
8) ...

That's what makes it fun, now doesn't it?

It's unquestionably something which separates fools and their money.

ac6xg

Jim Kelley wrote:

...
It's unquestionably something which separates fools and their money.

ac6xg



Yes, well, I am still working on a way to take to the grave with me ...
so far, NO PROGRESS!

I wish you better luck ... however, I guess others who will benefit from
the money will be more than grateful ... granting that I will be
unsuccessful in finding a way.

JS

"John Smith I" wrote in message
...
Thomas & Karen Mitchell wrote:

...
So: I'll stay at 25 when in the car.

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

Every engineer, worth his pay, which I know, allow at least a 20% excess
on ratings.

50 X 20% = 10 watts

50 + 10 = 60 watts

I'd run the 65 and examine the glass mount now and then. You'll see if
damage begins and switch lower power.

Warm regards,
JS

That sounds like a girl waiting until she is just a litte bit pregnant to
stat us birth control.
Either the glass cracks, it starts to delaminate, or you fry your finals,
all could be too far by the time you see it.

Jimmie D wrote:
"John Smith I" wrote in message
...
Thomas & Karen Mitchell wrote:

...
So: I'll stay at 25 when in the car.

-- KG7U
--------------------------------------------------------------------------
Tom Mitchell, Port Angeles, Washington, USA
http://www.olympus.net/personal/kg7u
--------------------------------------------------------------------------
Every engineer, worth his pay, which I know, allow at least a 20% excess
on ratings.

50 X 20% = 10 watts

50 + 10 = 60 watts

I'd run the 65 and examine the glass mount now and then. You'll see if
damage begins and switch lower power.

Warm regards,
JS

That sounds like a girl waiting until she is just a litte bit pregnant to
stat us birth control.
Either the glass cracks, it starts to delaminate, or you fry your finals,
all could be too far by the time you see it.



If the glass breaks, replace glass (highly unlikely! Bordering on
impossible!)

Glass cracking? Very unlikely!

Delamination? Perhaps, over much time ...

Fry the finals? What idiot would ever start using a rig and antenna
with no SWR indication?

JS

That sounds like a girl waiting until she is just a litte bit pregnant to
stat us birth control.
Either the glass cracks, it starts to delaminate, or you fry your finals,
all could be too far by the time you see it.


It is the ratings of the components in the matching unit that limit the
power rating not the glass, you will get smoke well before any damage to the
glass.

Jeff