[WT-support] PTT keying

[Bob Wilson, N6TV]

On 11/10/07, Stewart GM4AFF <stewart at gm4aff.net> wrote:
>
> How much current could these pins sink? Not much - not a relay?


Not much I think. I had trouble at my shack trying to sink a 12V outboard
PTT relay *and* send CW, using LPT pins 16 and 17.  I could do one or the
other, but not both at the same time.  That 12V relay must draw too much
current.

Fortunately I prefer QSK CW, so I just unplug the PTT line for CW and plug
it back in for SSB.  I'll wire up an "open/close" switch eventually.

73,
Bob, N6TV
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