That may be cure for KPA500 + KAT500 combo but KAT500 supposed to work with
amps of other manufacturers. My conversation with Elecraft tech support led
me to believe that some sort of TX delay can be implemented in future
firmware release.
73, Igor UA9CDC
----- Original Message -----
From: "iain macdonnell - N6ML" <[email protected]>
To: "Igor Sokolov" <[email protected]>
Cc: "Chris Johnson" <[email protected]>; <[email protected]>
Sent: Saturday, December 08, 2012 12:31 AM
Subject: Re: [Elecraft] [KAT500] Help with KeyLine Interrupt on KPA500
(Video)
It should be noted that the KAT500 does not "regenerate" the PTT
signal, rather it (only) interrupts it (by opening relay contacts).
Therefore it can't really delay the initial PTT signal going to the
amp... it can only interrupt it as fast as it can, when it detects
high VSWR.
As Gary mentioned, there is newer KPA500 firmware that alleviates the
problem of hard faults when it detects high VSWR before the KAT500 has
time to interrupt the keying line, but it appears that that new KPA500
firmware has not been generally released yet.
73,
~iain / N6ML
On Fri, Dec 7, 2012 at 4:10 AM, Igor Sokolov <[email protected]> wrote:
I think what happens is KAT500 needs few msec to determine the operating
frequency and measure SWR. There is currently no delay between PTT going
into KAT500 from the radio and PTT going out into the KPA500. These few
msec
is enough for KPA500 to switch itself to fault condition.
Here programmable PTT delay in KAT500 would be very helpful. Especially
so
with other makes of the amplifiers.
I have discussed it with Elecraft tech support and they say this feature
is
on their to do list. Lets hope that the next firmware revision of KAT500
will have that feature implemented.
73, Igor UA9CDC
----- Original Message ----- From: "Chris Johnson" <[email protected]>
To: <[email protected]>
Sent: Friday, December 07, 2012 3:35 PM
Subject: [Elecraft] [KAT500] Help with KeyLine Interrupt on KPA500
(Video)
Hi Guys,
I made a video and posted it on youtube to better explain the issue I'm
having. Please watch and then reply to it here if you would.
Much appreciated
http://www.youtube.com/watch?v=QtCPvKKM3_c
Chris
K6OZY
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
