[TenTec] Inrad Mods

[Ken Brown]

>
>
>If I didn't
>want to alter the TX bandwidth, Would putting the 2.8 filter in one of the 2 
>narrow 9 mhz IF
>slots work? that way I could leave the 2.4 in for Transmit, and since Rob 
>Atkinson said that the Narrow slots do not alter TX, I would be affecting recieve 
>only.
>
In my Omni VI (which is not a + version) the 2.4 kHz filter is ALWAYS in 
the receive AND transmit signal path, except in FM mode. When you use a 
NARROW 9 MHz IF filter, it is cascaded with the 2.4 kHz filter in 
receive, and is never in the transmit signal path. Depending on the 
steepness of the skirts of the 2.4 kHz filter, putting a 2.8 kHz filter 
with steeper skirts after the 2.4 in the receive path might make a 
difference. Usually equal bandwidth or narrower filters are used after 
the first filter.

It is possible that the OMNI VI+ does not have that 2.4 kHz filter in 
ALWAYS the way my Omni VI does. I don't have a schematic so I cannot 
say. I really would like to know.

DE N6KB