Ray,
That relay power is normally provided by the amplifier - you do not need
any voltage from the transceiver unless there is some strange and
unusual circuit involved.
Measure the voltage at the "PTT" or "KEYIN" jack of the amplifier. Is
it AC or is it DC? If AC, it will not work with the K3S which needs for
the voltage to be both positive and DC.
If it is DC, what is the polarity? It must be a positive voltage.
Many older tube amplifier designs depended on hard relay contacts for
keying that cold work with AC or DC and did not care about polarity.
In today's solid state world, one must care about such things.
On 11/30/2018 10:02 AM, Raymond wrote:
I am using my ancient Heathkit SB 230 (original tube) with my K3s. Is there a
way to get 12 volts out of acc connector to power relay? Using K3 external
plug for P3 power.
Ray
W8LYJ
Sent from my iPhone
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