Filters from In'tl Radio & Computer

[K2WK at aol.com]

In a message dated 95-07-28 19:39:31 EDT, rjmatt at world.std.com (Robert J
Mattaliano) writes:

>Another advantage to the IRCI CW filters is that they (appear to) come in 
>matched pairs.  Mine (400 Hz) are very usable to less than 80 Hz ( - 3 dB) 
>in VBT mode in the 940.  Stock Kenwoods don't even come close unless you 
>were very lucky with what came off the shelf. Otherwise forget VBT working 
>well. If only we knew the source!
>
>

Has anyone had experience using the IRCI filters in an Yaesu FT-1000D?