NCJ Mar/Apr 8 Issue - pg 7-8: RX Parameters for Contestors

[James Denneny]

Author summarizes (pg8):  "around 100 to 105 dB of total dynamic range is
about all that most people want".  So, are claims of -138dB etc overblown in
terms of efficacy?  Interesting article by G3RZP.

 

Jim

K7EG

 

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[KC0G]

James Denneny wrote

Author summarizes (pg8):  "around 100 to 105 dB of total dynamic range is
about all that most people want".  So, are claims of -138dB etc overblown in
terms of efficacy?  Interesting article by G3RZP.
Jim
K7EG

 
You can find the article at:
   http://www.arrl.org/ncj/2008/03/feature.pdf

In his conclusion, G3RZP goes on: "The real question is where the dynamic range starts.  An antenna attenuator appears to be a useful approach to having a relatively low-cost (and low-power) approach to the receiver front-end problem".

This article reminds me of one by Gary Breed, K9AY, which appeared in the Nov/Dec 2000 issue of the NCJ.  You can find it at:
   http://www.arraysolutions.com/Products/appnote_preamps.htm

I do not see an easy way to add external attenuation to the transmitting antenna, as per K9AY, on a K3.

73 John  KC0G





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