Topband: Loss Question

[Chortek, Robert L.]

Hi Mike,


That just goes so show you how little I know!  I assumed, apparently incorrectly, that there was some loss IN ADDITION to the transmission line loss (which I know how to calculate).  In other words, I thought that if my transmitter was connected directly to the antenna there would be some mismatch loss and that as soon as I added coax, then ADDITIONAL transmission line loss would be added and the TOTAL loss would be the sum of the two components.  I infer from the responses that the loss is only the transmission line loss (aside from whatever efficiency losses are in the system due to the type of loading, resistance between connections, conductor loss, ground loss, etc., etc.).


Thanks for your reply!


73, es DX,


Bob/AA6VB


________________________________
From: Mike Waters <mikewate at gmail.com>
Sent: Thursday, October 25, 2018 10:43 AM
To: Chortek, Robert L.
Cc: topband
Subject: Re: Topband: Loss Question

It is impossible to answer you without knowing the length and type of coax. :-)

73, Mike
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On Thu, Oct 25, 2018, 12:24 PM Chortek, Robert L. <Robert.Chortek at berliner.com<mailto:Robert.Chortek at berliner.com>> wrote:
Does anyone know how much power would be lost if a resonant antenna with an Impedance of say, e.g.  36 Ohms is fed  with 50 Ohm coax?  Is there a good source where I could look up this kind of information?


Thanks!
Bob/AA6VB