KPA500 fault

classic Classic list List threaded Threaded
3 messages Options
Reply | Threaded
Open this post in threaded view
|

KPA500 fault

Len Chesler-2
I am enjoying my new KPA500 coupled with my K3, and I have set up the K3 to transmit at approximately 25 watts in the  "operate" position on all bands except 30 meters. However, if the amplifier menu is set to default to "operate" mode upon KPA500 initialization,  I  experience an immediate overdrive fault on the amplifier which tells me that the amplifier is not immediately sensing the lower power output setting on the K3.    I have temporarily remedied this situation by setting the KPA500 menu to default to "stby" mode upon turn on, and then when I manually switch to "oper" mode, I do not experience the overdrive fault .  It would be more convenient  to have the amplifier default to the operational state, as designed.  I am curious if anyone else is experiencing this situation??


 

______________________________________________________________
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
Reply | Threaded
Open this post in threaded view
|

Re: KPA500 fault

Richard Squire - HB9ANM
Hi Len

My KPA500 is normally set to PWR ON = STBY, which is the factory default setting.
But after setting it  to OPER for a test,  I noticed the same thing.
I suspect this is a timing issue, just like leaving the K3 at low power on band change if BAND CHG is set to STBY.
The next FW release is supposed to solve the problem. Some hams (field testers?) seem to have FW 1.11 (which is not even Beta yet) but most still use 1.02.

Let's wait and see...

73
Richard - HB9ANM
Len Chesler-2 wrote
However, if the amplifier menu is set to default to "operate" mode upon KPA500 initialization,  I  experience an immediate overdrive fault on the amplifier which tells me that the amplifier is not immediately sensing the lower power output setting on the K3.
Richard - HB9ANM
Reply | Threaded
Open this post in threaded view
|

Re: KPA500 fault

John E. Reiser
Hi Len,

I think KPA500 FW 4.11 will fix this and similar issues  You can request the
pre-beta by sending an e-mail to [hidden email].

73,  John, W2GW


----- Original Message -----
From: "Richard Squire - HB9ANM" <[hidden email]>
To: <[hidden email]>
Sent: Saturday, August 27, 2011 5:07 AM
Subject: Re: [Elecraft] KPA500 fault


> Hi Len
>
> My KPA500 is normally set to PWR ON = STBY, which is the factory default
> setting.
> But after setting it  to OPER for a test,  I noticed the same thing.
> I suspect this is a timing issue, just like leaving the K3 at low power on
> band change if BAND CHG is set to STBY.
> The next FW release is supposed to solve the problem. Some hams (field
> testers?) seem to have FW 1.11 (which is not even Beta yet) but most still
> use 1.02.
>
> Let's wait and see...
>
> 73
> Richard - HB9ANM
>
> Len Chesler-2 wrote:
>>
>> However, if the amplifier menu is set to default to "operate" mode upon
>> KPA500 initialization,  I  experience an immediate overdrive fault on the
>> amplifier which tells me that the amplifier is not immediately sensing
>> the
>> lower power output setting on the K3.
>>
>>
>
>
> -----
> Richard - HB9ANM
> --
> View this message in context:
> http://elecraft.365791.n2.nabble.com/KPA500-fault-tp6731485p6731711.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> ______________________________________________________________
> 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