[Premium-Rx] MULTICOUPLER

[Clemens Paul]

Hi all,

an IIP2 of +42dBm would mean that for 2 signals with S9+40dBm (-33dBm) you would get a second
order intermodulation product of -108dBm wich is approx. S3,
for 2x S9+50dBm you'll get IM2 products of S 6,5,
for 2x S9+60dBm you'll get IM2 products of ~ S 8 (-68dBm).
To get back to premium RX's,the Telefunken E1800 has an IIP2 of +65dBm (like the Orion) w/o
preselector and +85dBm with preselector.
The IC-7800's IIP2 was measured by ARRL with +98dBm w/o preselector on 20m. 
My results w/o preselector were +112dBm on 20m and +104dBm on 15m,
with preselector +114dBm on 20m and +122dBm on 15m.

73
Clemens
DL4RAJ
  ----- Original Message ----- 
  From: WJ 
  To: Premium-rx at ml.skirrow.org 
  Sent: Saturday, April 01, 2006 6:03 PM
  Subject: Re: [Premium-Rx] MULTICOUPLER


  At 10:01 AM 4/1/2006, you wrote:
  > > In Europe you would not get very happy with an IP2
  > > of +42dBm
  >
  >   Isn't +42dBMm 15 watts? Do you have more than 15
  >watts of off channel signal into your antenna?


  And 28 volts.  Yeow.  That's one tough RF environment.

  Terry O'



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