Don Wilhelm wrote:
close to it when the computer is not powered. If you check the R-232
signal levels you will find that the region around zero volts (+3v to
-3v) is undefined - the system is designed that way to include noise
Actually, for some modem control lines, it is well defined,
Ed Muns, W0YK wrote:
I would vote not to make Test mode persistent. While I find
it very useful, it can be a trap for an inexperienced K3
user, to whom it might look like the radio simply isn't
working. There is no indication that the radio is in Test
mode, other than the failure to
I've always wondered why TEST mode wasn't persistent - if I put the K3
into TEST to prevent inadvertent keying, it comes back up on next
powerup in normal mode.
Bob NW8L
On Fri, Jun 27, 2008 at 9:57 AM, Dave Hachadorian [EMAIL PROTECTED] wrote:
I've got my K3 set up for cw on Field Day with a
- Original Message -
From: Bob Cunnings [EMAIL PROTECTED]
To: Elecraft Reflector elecraft@mailman.qth.net
Sent: Friday, June 27, 2008 9:00 AM
Subject: Re: [Elecraft] K3 Key-down on power-up
I've always wondered why TEST mode wasn't persistent - if I put the K3
into TEST to prevent
I would vote not to make Test mode persistent. While I find
it very useful, it can be a trap for an inexperienced K3
user, to whom it might look like the radio simply isn't
working. There is no indication that the radio is in Test
mode, other than the failure to transmit.
Actually,
Ed Muns, W0YK wrote:
I would vote not to make Test mode persistent. While I find
it very useful, it can be a trap for an inexperienced K3
user, to whom it might look like the radio simply isn't
working. There is no indication that the radio is in Test
mode, other than the failure to
I've got my K3 set up for cw on Field Day with a laptop usb port driving
a usb to serial converter. Rig control and cw keying are done over the
serial cable...
Once it happens to you, you get gunshy about turning the rig on with
rs-232 connected. Maybe there could be some sort of inhibit to
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Andrew Faber
Sent: Friday, June 27, 2008 12:13 PM
To: Bob Cunnings; Elecraft Reflector
Subject: Re: [Elecraft] K3 Key-down on power-up
SNIP There is no indication that the radio is in
Test mode, other than
Dave and folks,
That behavior is a natural consequence of an unpowered RS-232 signal
line. The voltage on the RTS (or DTR) input to the K3 will be zero or
close to it when the computer is not powered. If you check the R-232
signal levels you will find that the region around zero volts (+3v
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