Kx3: How to interface UP, DOWN and PTT signal ?

[Brian Lodahl]

Hi,

[ Reposting in seperate thread ]

For the 4-pin mic pinout for the MH-3 microphone, it is listed that the
PTT line also carries logic for UP and DOWN keys.

As I want to interface using a Heil Traveller headset, which has the UP
and DOWN key signals on a seperate line (8-pin round standard), how are
the logics defined for this pin (first ring on the 4-pin jack) on the
Kx3 and MH-3, respectively ?

Would it be possible to ask for a schematic ?

73'
Brian OZ2BRN
Kx3 # 1118, K2 # 6936

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[Lou Voerman W2ROW]

Look on the Elecraft web site under manuals then KX3. There is an instruction sheet for the MH3 posted there which shows a schematic.

Lou   W2ROW

Brian Lodahl wrote

Hi,

[ Reposting in seperate thread ]

For the 4-pin mic pinout for the MH-3 microphone, it is listed that the
PTT line also carries logic for UP and DOWN keys.


Would it be possible to ask for a schematic ?

73'
Brian OZ2BRN
Kx3 # 1118, K2 # 6936