[Elecraft] Crystal filters for K4D.

[Martin Sole]

I think K4D is a direct sampling SDR, no such thing as a discrete filter in sight, Crystal or otherwise.

K4HD module will revert a K4D back to an old fashioned superheat front end with a fixed first IF so you can fit filters but I don’t know if any outside Elecraft knows what the centre  frequency will be.

Probably only worth it if you’re a multi multi station or have 1500 watt neighbours half a mile away.

Martin
Hs0zed

Sent from my iPhone

> On 1 Dec 2023, at 18:47, Pete Smith N4ZR <pete.n4zr at gmail.com> wrote:
> 
> I am about to buy a K4D.  I have 500-Hz filters (probably INRAD) in both my K-3's receivers.  Will these filters fit in the K4D?  If not, who currently sells such filters for the K4D?
> 
> --
> 73, Pete N4ZR
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