Vic,
Yes, a better way would be using a diode thru a switch to ground. In
my diagrams the 1K resistor probably should be retained so the diode
does not draw excessive current when grounded (not needed if you use
the 2.2K to 10K dropping resistor in place of the 5v regulator)
In my circuits a relay (shown as K4 "TX2 SEQ Stage") in my sequencer
grounds the diode. This enables the transmitter after all preamps,
TR relays, and other transmitting equipment have been switched into
"transmit mode". I only use inhibit on 6m and above bands and this
is to avoid hot switching my eme QRO equipment.
The VOX/AUTO-OFF is probably more convenient to avoid RS232 start up
keying. No extra circuitry needed.
73, Ed - KL7UW
From: Vic K2VCO <[email protected]>
To: [email protected]
Subject: Re: [Elecraft] K3 Bootup sequence?
Message-ID: <[email protected]>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
If you do this, make sure that when you remove the 5v pin 7 is either
grounded directly or
via a resistor. if you let it float, it may inhibit output in that condition.
Yes, I see that Ed didn't do that in his schematic -- maybe it's
rig-dependent, but I've
had this problem.
73, Ed - KL7UW
http://www.kl7uw.com
[email protected]
"Kits made by KL7UW"
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