[1000mp] W8JI INRAD roofing filter measurements

[Adam Farson]

Lou, Garry,

Correct. The crystal resonator(s) and any ferrite-cored inductors in the
filter can be driven into saturation, at which point they will behave as
non-linear circuit elements and generate IMD.

Cheers for now, 73,
Adam VA7OJ/AB4OJ


-----Original Message-----
From: 1000mp-bounces at mailman.qth.net [mailto:1000mp-bounces at mailman.qth.net]
On Behalf Of Lou
Sent: Wednesday, April 25, 2007 14:46
To: 'All about Yaesu 1000mp'
Subject: RE: [1000mp] W8JI INRAD roofing filter measurements

I think you got it. As an example, diodes are passive non-linear devices
exploited for mixing. Mixing is useful IMD.

Lou W7HV

-----Original Message-----
From: 1000mp-bounces at mailman.qth.net [mailto:1000mp-bounces at mailman.qth.net]
On Behalf Of Garry Shapiro
Sent: Wednesday, April 25, 2007 2:38 PM
To: All about Yaesu 1000mp
Subject: Re: [1000mp] W8JI INRAD roofing filter measurements

VA7OJ quotes "degradation...due to passive IMD in the filter." I am
unfamiliar with the term "passive IMD" but suppose it to mean IMD due to
nonlinearities in passive components in the filter.  Can anyone
knowledgeable in the subject contribute something here?

Garry, NI6T