The RTTY interfaces often tend to be very low impedence and risk overloading by
plugging a sound card audio output directly to it.
There is a useful schematic at the link below for interfacing a sound card to
the mic or aux input, and includes RS232 control of the PTT.
Shopping list consists of a 470ohm, 8ohm, and 4.7ohm resistor, a diode, and an
NPN transistor.
http://www.iw5edi.com/ham-radio-reference/sound-card-interfacing-for-rtty-psk31-and-sstv
73
Leland
g0szp/aa2qx
On 16 Mar 2010, at 02:33, Claude Frantz wrote:
> Hello Folk !
>
> Do you have any experience about the coupling of the FT2000 to a
> notebook computer having only an audio out and a mike in jack ? I think
> the RTTY jack is the prefered way. Right ? Are the impededance and the
> level OK for a direct coupling or is any attenuator or amplificator
> necessary ?
>
> Thanks a lot !
>
> Claude
>
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