[CQ-Contest] Roofing filter improvements?

[Maarten van Rossum]

Sounds like a good rig to me. Those INRAD filters sure can change a mid
level rig into something more usable. I had a FT 990 which wasn't a bad
transceiver to start with. But after swapping the original filters with
INRAD filters it definitely made a difference.
With other rigs such as the FT 1000D, FT 1000MP, TS 440 and FT 857, I have
also seen good improvements after installing INRAD filters.
Good 5 to 6 KHz filers work fine for SSB. In fact, some of the more recent
up-conversion radio's claim to have 3 KHz wide filters which actually are 6
KHz wide.
A 1.8 KHz filter is about as narrow as you can get for SSB. The same goes
for a 250 Hz filter for CW.

73, Maarten PD2R



2010/11/10 John Geiger <aa5jg at fidmail.com>

> I have a mid level, late 90s rig on the way that has had the INRAD roofing
> filter installed in it. This is supposed to be a 5 to 6khz wide roofing
> filter, not some of the real narrow ones we are seeing today.  What kind of
> performance improvement are others seeing with these roofing filters?  Is it
> likely to turn a mid level rig into something usable in crowded contest and
> DXing conditions?  The rig will also have a 250hz CW INRAD filter and a
> 1.8khz INRAD filter installed.
>
> 73s John AA5JG
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