I suppose you could gamma match it.

--
Alec Wood M1BNK
Teesside UK

Interested in Ham Radio....have a look at www.ukradioamateur.org

"Ketalar" wrote in message
news
Subject to restrictions and poor location, I can't install any antenna.
My window has an aluminium frame.
I considered to use it as a loop, but it is inherently shorted.
How would you feed that ?
Freq : FM BC band.
Window : abt 0.90 * 1.60 (metres)
Thanks by advance.

Ketalar,
Assuming that the antenna would be for receiving only,
just connect a single wire between the receiver and the
window frame. Don't worry about 'matching'. And a second
wire from the radio's ground connection to ground. Will
there be an improvement in reception? Beats me! But it
shouldn't be difficult to find out...
'Doc

TNX fer the answer. That's what I was looking for, but I'm not an expert abt Gamma-matching : how should I proceed ?

Le Wed, 30 Jul 2003 13:07:39 +0100, Alexander S. Wood a écrit:

I suppose you could gamma match it.




--
A personne, sauf Ã* ceux qui y prendront plaisir (Franz Schubert, 1797-1828)

For instance, the distance between the two tap points : which one to start with , supposing I insert a variable capacitor (Sorry, the only antenna work I did was for top band) ??

Le Wed, 30 Jul 2003 18:38:09 +0200, ketalar a écrit:

TNX fer the answer. That's what I was looking for, but I'm not an expert abt Gamma-matching : how should I proceed ?

Le Wed, 30 Jul 2003 13:07:39 +0100, Alexander S. Wood a écrit:

I suppose you could gamma match it.







--
A personne, sauf Ã* ceux qui y prendront plaisir (Franz Schubert, 1797-1828)

Subject to restrictions and poor location, I can't install any antenna.
My window has an aluminium frame.
I considered to use it as a loop, but it is inherently shorted.
How would you feed that ?
Freq : FM BC band.
Window : abt 0.90 * 1.60 (metres)
Thanks by adv

...........................................
Try connecting your leads (both) to various points on the window,you might get
lucky. I was able to achieve resonance with the windscreen
frame on a Sunbeam Tiger I restored. Luckily the spacing of the mounting studs
were close to the right tap points.
Works better the the usual 1/4 wave whip!
KC*VIF
Greg Z
to thine own sound be true

F5LCI wrote:
"Maybe the feedline needs sleeves?"

When the window is closed, its "balance" may be better, or it could be
worse.

Coax could be your bon ami in eliminating the computer display noise if
used with FM/TV baluns. Ground the shield to the radio. Ferrite sleeves
around the coax may reduce transport of the interference on the exterior
of the shield to the radio.

Best regards, Richard Harrison, KB5WZI