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Old December 28th 05, 04:33 AM posted to rec.radio.shortwave
RHF
 
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Default Single Wire Antenna {Longwire / Random Wire Antenna} - What To Use : Antenna Tuner? and/or Pre-Selector?

Hello - Calling R2000SW and Telamon Where Are You ? ?

The Topic has move to the "Impedance of the Transmission Line"

IIRC - If the Matching Transformer is used and the Secondary Side
of the Matching Transformer exhibits a nominal Impedance of 50 Ohm;
and is connected to a 50 Ohm type Coax Cable; that is connected to
a Receiver's 50 Ohm Antenna Input.

The Coax Cable for all practical purposes is not a significant part
of the Impedance Relationship (Ratio) between the Antenna and
the Receiver's Antenna Input.

The Primary of the Matching Transformer 'helps' to smooth-out
the variations in Impedance of the Antenna due to changes in
Frequency with respect to the Receiver's Antenna Input Circuit.

The Impedance Matching improvement is far from perfect :
But the Dynamic Range of the Front-Ends of most Modern
Shortwave Receivers can easily compensate for any signal
lost due to Impedance Miss-Matches between the Antenna
and the Receiver's Antenna Input Circuit.

hey I could be wrong - cause iane ~ RHF
 
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