[TenTec] Inrad Filter

["Michael C. Marx" <sndtubes@vacuumtubes.com>]

I have 2 Omni VI opt3's.  One of them has an Inrad 1.8 KHz 9 MHz filter.  There 
is 2 1/2 S units of attenuation when I switch this filter in on both radios.  
This happens with the gain jumper in either position.  Is this normal or is the 
filter bad?  A 250 Hz or 500Hz TenTec filter or 400 Hz Inrad filter does not 
have this kind of attenuation.   I notice only minimal  loss with those.   Any 
thoughts?



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