[1000mp] difference between Yaesu XF-... and YF-... filter types

[Peter Connors]

Uwe,

As I understand it, the YFxxx denotes a plug-in printed circuit board 
with the corresponding XFxxx filter mounted on it.
That apart, on a strong carrier I have the same indicated signal 
strength (S9+30) from 6kHz down to 250Hz on my MkV Field with a complete 
set of YF/XF filters.

73, Pete, G4PLZ

Uwe Fleischer wrote:
> Hi altogether,
> 
> does anybody know the difference between the Yaesu XF-. and the YF-. filter
> types? I purchased the XF-110CN/XF-114CN 250Hz filters that were recently
> offered here on this list for my Mk-V Field.
> 
> If I tune the RX to the maximum signal strength of a stable (CW) carrier
> now, it seems, that the signal is 2 S-units weaker with the 250 Hz filters
> than with the 400 Hz filters (from Inrad). Of course I tried to re-tune to
> the max signal after switching the bandwidth from 400 to 250, in case that
> filter curves would have a slightly different centre frequency.
> 
> Now I discovered in the manual, that Yaesu lists the YF-. type as optional
> filters for the Mk-V (Field). Has this any relation to my problem?
> 
> Thanks in advance, and I hope you all were successful in working 5A7A in any
> mode on any band ;-)
> 
> 
> 73 de Uwe, DL8UF
> 
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