[INRAD] Roofing filter and IMD?

[William B. Stacy]

Curious!  I hadn't noticed that in the times I had looked at Tom's chart.
He has similar results in the other chart:
http://www.w8ji.com/receiver_tests.htm. 

73,
Bill, N5TU

-----Original Message-----
From: list-bounces at inrad.net [mailto:list-bounces at inrad.net] On Behalf Of
Floyd Sense
Sent: Tuesday, July 17, 2007 4:54 PM
To: list at inrad.net
Subject: [INRAD] Roofing filter and IMD?

I was looking at a receiver test matrix at w8ji.com today and noted that 
the FT1000MP MK V with Inrad roofing filter tested 13 dB worse for 2 KHz 
IMDR than the same transceiver WITHOUT the roofing filter.   Anyone know 
why that is?  Here's the URL of the subject chart: 
http://www.w8ji.com/receiver%20IM3%20sorted.htm

Is there a problem in the design of the transistor amp used in the filter?

73, Floyd - K8AC

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