[Elecraft] K4 bandpass filters?

[Bill Frantz]

In the K4HD model, there are two crystal filters, one for CW and 
one for SSB. These radios are designed for strong nearby 
signals, as might occur on a DXpedition, where there are several 
stations operating on the same band.

I wonder if the "SSB" filter is wide enough for running 
Fox/Hound FT8 in Fox mode. There you really want a bandwidth of 
4K or so to copy all the callers.

On the other hand, you may want narrower when running SSB. It is 
possible that the DSP filter can handle that situation since you 
can plan the transmit frequencies to be at least 4KHz apart.

73 Bill AE6JV

On 5/19/19 at 4:10 PM, jtmiller47 at gmail.com (Jim Miller) wrote:

>Eric mentions bandpass filters in his interview and the 
>description of the K4D mentions a second set of those.
>I wonder how those are configured?
>Are they always active? Do they permit general coverage operation?
>
>Jim ab3cv

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