[TenTec] Inrad roofing filters for Omni VI, anyone using?

[Ken Brown]

The Inrad web site does not specifically say whether the roofing filter 
kit puts the new roofing filter in instead of the stock 2 pole 15 kHz, 
or in addition to it. However one can surmise, based on the number of 
cables, that the added filter gets switched in, in addition to AND in 
front of the 15 kHz filter, and NOT instead of the 15 kHz filter.

If one were to replace the stock 15 kHz filter with a 2.4 kHz filter, 
then the Inrad board could switch a narrower filter (like 1 kHz)  in for 
CW, or maybe a 1.8 kHz for "tight" SSB. There are a few problems with 
this idea. First is the question of the difference in loss and impedance 
matching with the 2.4 kHz filter versus the stock 15 kHz filter. The 
other problem (maybe not a big one for a lot of us) is that the rig 
would no longer have FM receive capability, except really really narrow 
band FM. Also the stock 2 pole filter is rather small. A 2.4 kHz filter 
would require some off board mounting scheme and interconnecting cables.

I think Inrad would sell more of their mod kits if they could accomodate 
two optional roofing filters.

DE N6KB