[Elecraft] K# and data modes

[Mike]

Julian, G4ILO wrote:
> quote author="Mike-39">
> Has anyone used a Buxcomm Rascal interface with the K3? If so, what 
> cable does it use?
>
> What other interface is used for RTTY and PSK31? I want to do direct 
> keying, not audio, and I want to copy with the 'puter.
>
> Does the K3 come with the mating plug for the acc jack?
>
>
> There is no need to use a special interface with the K3. The audio in/out
> already has isolating transformers, so just the RS-232 cable that you need
> for updating firmware plus a couple of 3.5mm stereo double ended screened
> cables from your compouter shop are all you need.
>
> Not quite sure what you mean by direct keying, especially in the context of
> PSK31. The K3 can do direct FSK RTTY, though I've never used it and don't
> see what the advantages are, especially if you'll be using sound card
> software to do the decoding. I have a hunch the K3 does FSK by generating
> audio within the DSP anyway.
>
>   
Hi Julian -

Direct keying = FSK
Audio keying = ASFK

See http://www.aa5au.com/gettingstarted/rtty_start_intro.htm for some 
pro/con arguments re: RTTY. I've always used FSK, so it's my preference 
not to change. I also don't want to deal with the offset between SSB and 
FSK. Or does the K3 deal with that internally?

I'm not too sure about the PSK31 scheme either.

73, Mike