400Hz CW Filter for SB-310 Trade??

[Mark V. Johnson VE3DJU]

Hello everone. I've got to stop buying these SB units...Filling up my room.
Anyway, latest purchase needs a 400Hz CW Filter.  I have a filter (400Hz
CW) for the SB-300 receiver but it is the wider type and will not fit.
Anyone have a narrow version that they would like to trade for my wider
version?? Anyone have a narrow version they would like to sell??

Thanks Folks!!

Sponsored by the City of Tempe 

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