[Elecraft] Paddle input with Y connector OK?

[Guy Olinger K2AV]

The problem with wire Y's in your situation will be that the keying
voltage from one rig will be across the circuitry of the other.  This
is most likely an issue whether both rigs are turned on or not. It can
simply act as a shorted line to the paddle input, or it can be
destructive.  Bad idea.

IF ALL the devices/rigs to be keyed present a positive voltage to key
on the paddle connections, double-diode "Y's" can be used (sometimes
called diode "Or's").  Diode cathodes are wired together and to the
key/paddle's dit/dah leads.  The separate diode anodes go on to the
"paddle" leads from the rigs/keyer.  Each additional device will
require another diode off the common points for the dit and dah (2
additional diodes total per additional "paddled" device).

73, Guy.

> On Mar 27, 2011, at 14:50, Barry <w2up at comcast.net> wrote:
>
>> Is there any reason I shouldn't make a "Y connector" so my CW paddle can
>> be input to the K3 and another radio (or external keyer)?  Yes, only one
>> will be on at any given time.
>> Tnx,
>> Barry W2UP
>>
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