http://elecraft.85.s1.nabble.com/KPA500-Peculiar-behavior-no-power-output-on-Operate-tp7564452p7564682.html
My profound input . . .
> My observations:
> The K3 is delivering only the KPA500 drive level power not 100 watts. So at
> least the K3 "thinks" it is driving the PA in operating mode. The KPA500 has
> only the first one or 2 power leds lit.
> The PA has the *. I think that indicates key is being generated.
> Mine does this about 1 or 2% of the time and only for the First QSO.
>
> I have had the issue after starting the K-Line sequentially, i.e. K3 boots
> first (to the end of the banner), P3 boots (after waiting for SVGA) then I
> turn on the KPA500; as well as starting all at the same time. I have been
> using the sequential method for a while now.
>
> If it is important to have the KPA500 operating (Net Control), I test it
> into the dummy to be sure. The failure is very low & my observations are
> over many times not just one. They could be flawed; but I think not.
>
> George
> AI4VZ
>
> -----Original Message-----
> From: Jack Berry
> Sent: Saturday, October 27, 2012 1:31 PM
> To: W5RDW ;
[hidden email]
> Subject: Re: [Elecraft] [KPA500] Peculiar behavior : possible solution
>
> My theory on the "Peculiar behavior" issue:
> I have seen this problem several times before and finally decided it's an
> issue of interrupted "handshaking" between the K3 and KPA500. Seems that all
> communicating digital devices go through and introduction to confirm
> communication before they get down to business.
> My solution is to power on the K3,
> -wait till the banner has cleared and then hit the KPA500 front panel ON
> button.
> -Wait till the "KPA500 On" banner has cleared and then switch from Standby
> to Operate.
>
> When I have taken the few extra seconds to all the handshaking to complete,
> I don't recall ever seeing a failure of the KPA500 to deliver full power.
>
> God Bless & 73!Jack - WE5ST
>
>
> ________________________________
> From: W5RDW <
[hidden email]>
> To:
[hidden email]
> Sent: Saturday, October 27, 2012 12:06 PM
> Subject: Re: [Elecraft] [KPA500] Peculiar behavior : no power output on
> Operate
>
> Update........
>
> I just turned on the K3/KPA500/P3 as usual (KPA500 is OPER, not Standby) and
> listened to the band for awhile. I heard a strong station calling on 12
> meters SSB from Scotland and gave him a call and noticed only the K3 was
> putting out power (probably 20 or so watts, the low drive I usually use to
> drive the KPA500). He answered me and I then came back to him on the OVER,
> but now, the K3/KPA500 was putting out 400-450 watts as normal
> --
> ______________________________________________________________
> Elecraft mailing list
> Home:
http://mailman.qth.net/mailman/listinfo/elecraft> Help:
http://mailman.qth.net/mmfaq.htm> Post: mailto:
[hidden email]
>
> 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:
[hidden email]
>
> This list hosted by:
http://www.qsl.net> Please help support this email list:
http://www.qsl.net/donate.html>
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 2012.0.2221 / Virus Database: 2441/5355 - Release Date: 10/26/12
>
>