For the same reason we call using Morse Code CW.
It is more accurately referenced as Discontinuous Wave.
73, Kevin. KD5ONS
On 4/1/22 13:23, Fred Jensen wrote:
Why do we call this "wireless?"
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
Jack Brindle via Elecraft wrote on 3/31/2022 9:47 PM:
OK, now this is starting to make sense. Jim’s K3 has a KIO3, not the
newer KIO3B. On the older board, the BAND and PTT lines have pullup
resistors to the Vcc rail.
When the K3 is powered off, that Vcc rail is at 0 volts, which means
the pull-ups are now pulldowns. Thus the K3 is inadvertently keying
the KPA500. If the KPA
detects that the KEY input is low when the user tries to put it into
OPER mode, the amplifier will reject the request and stay in STBY.
Thus the condition that
Jim is seeing.
Try disconnecting the AUXIO cable from the KPA500 and see if it now
operates properly. You may actually need to connect the KAT500 to the
KPA using both the AuxIO
and phono cables (for PTT) depending on which radio is in use.
The main issue is how to disconnect the PTT signal from the K3 to the
KPA when using the Icom. Otherwise you may be able to leave the AuxIO
cable connected.
I know that Fred Cady discussed sharing a KPA between two radios in
his book, but has anyone solved this situation - one radio is a K3,
the other something else?
73,
Jack, W6FB
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