Hi Cecil,
1. Use an (external) sequencer which act upon PTT assertion (CW and/or SSB)
and controls your rig and amplifier accordingly
2. Use some delay between assertion of CW PTT and first dit/dot to make sure
you don't lose the first one and sound like A5DL :-)
For 1. There are many solutions, one of the is at
http://www.xs4all.nl/~kvgog/projects/tx_rx2.html
For 2. Check out Winkey www.k1el.com , in most of the (contest) applications
the "lead time" is settable to let's say 100ms.
Gl, Carel
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
Behalf Of Cecil Acuff
Sent: Saturday, February 20, 2010 4:57 PM
To: amps@contesting.com
Subject: [Amps] Hotswitching issues 30s-1
Hi Folks,
I am having a problem with my solid state rig switching to TX and outputing
RF quicker than the amp is ready to process it.
Since the amp cannot anticipate a PTT occurance how can this be resolved?
It would be nice if transceiver builders would design in a programmable
delay in acting on a PTT request till after the amp key line were asserted.
It's a basic handshaking design much like RS-232 com.
I have considered taking the key line to an external box that activates the
amp key line prior to sending PTT to the rig. Would work great for SSB but
not sure so good for CW.
Am I making this harder than it should be?
My FT-1000MKIV is giving me a high SWR display because of the few
milliseconds of no load while waiting for the open frame relay in the
Collins to get in place. Once all is settled the reflected power is nil...
Don't want to blow up the rig...
Don't have this problem with my old Dentron Clipperton L...I guess it has a
faster relay.
Thanks...
Cecil Acuff
K5DL
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