[Elecraft] PTCiiUSB Modem ACC instructions to KX3/KX2 TTL or V24?

[Don Wilhelm]

Chris,

I believe you could use either.  Their should be no damage to the KX2 if 
the V24 levels are used.  To be safe, try TTL first - if it works, use 
it.  If not, switch to V24.

73,
Don W3FPR

On 2/17/2017 7:12 AM, Chris via Elecraft wrote:
> My KX2 operates Pactor 2 with RMS Express and Airmail on my PTCiiUSB
> modem with the KX2 ACC cable for changing frequency.  But I also want to
> connect the PTCiiUSB rig controls directly to the KX2 ACC socket to
> avoid having to use the extra ACC cable.  I know the PTCiiUSB allows the
> Kenwood instruction set that works on the KX3 and I think it also has
> the K3 instruction set.  The connections are clear and making the cable
> will be easy, except that the PTCiiUSB offers the options of TTL or V24
> for the RXD and TXD connections.  Does anyone know whether the KX2 and
> the KX3 use the TTL or the V24 protocols and whether connecting to the
> wrong protocol will cause damage?
>