[Elecraft] K3 Roofing filters

[Joe Subich, W4TV]

> If you do a lot of AM transmit you will have a cleaner signal with
> the 6K filter.

Only marginally and only so far as it applies to synthesizer phase
noise more than +/- 3 KHz from the carrier.  Even then, the K3 will be
much cleaner that the typical YaeComWood up-conversion transceiver with
their 30 KHz wide 4 pole VHF filters.

73,

    ... Joe, W4TV


On 10/10/2013 1:27 PM, Bill Frantz wrote:
> I think Paul had gotten the information he was asking about from others
> Bill and Don.
>
> I don't see much use for the 6K filter since you can now use the 13K FM
> filter for AM transmit. If you do a lot of AM transmit you will have a
> cleaner signal with the 6K filter. If you only do AM receive, you can
> use the 2.7K or 2.8K filter to receive on only one sideband and get
> usable performance when conditions need narrower roofing than provided
> by the 13K filter. Save your filter slots for hard SSB, CW and digital
> conditions where roofing can be a lifesaver.
>
> Cheers - Bill, AE6JV
>
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