[Elecraft] Normal KPA500 behavior?

[Oliver Dröse]

Mike,

that sounds like a voltage drop under load, i.e. lower voltage to the temp 
measurement sensor and thus a lower reading under load. Maybe time to 
contact Elecraft support? Possibly a fault in one of the low voltage 
generating components. Does not seem to be normal.

73 & gl, Olli - DH8BQA
http://www.dh8bqa.de/




----- Original Message ----- 
From: "Mike Walsh" <ke5akl at yahoo.com>
To: <n5ge at n5ge.com>
Cc: <elecraft at mailman.qth.net>
Sent: Friday, February 10, 2012 9:30 PM
Subject: Re: [Elecraft] Normal KPA500 behavior?


Hi and thanks for the replies.

However, I think people are misunderstanding my question about the TEMP 
display. When I hit the key to send a 500 watt carrier the display instantly 
drops 5 degrees C and instantly goes back up to the real temperature when I 
release the key. It's that instant change in displayed temperature that I'm 
asking about, not the relatively slow increase or decrease associated with 
the real heating and cooling of the amp. Do others see that instant decrease 
on transmit??

73 and Thanks,

Mike - ke5akl


________________________________
 From: "n5ge at n5ge.com" <n5ge at n5ge.com>
To: Mike Walsh <ke5akl at yahoo.com>
Cc: "elecraft at mailman.qth.net" <elecraft at mailman.qth.net>
Sent: Friday, February 10, 2012 1:18 PM
Subject: Re: [Elecraft] Normal KPA500 behavior?


1) With CW carrier; Temperature rises as I hold down the straight key.
Temerature falls when releasing the key. While sending CW (dits and dahs)
Temperature rises. When I release the keyer paddles the temp begins to fall
within about 2 seconds.

73,
Tom

-- American Indian comment about Daylight Saving Time --


On Fri, 10 Feb 2012 11:28:10 -0800 (PST), Mike Walsh <ke5akl at yahoo.com> 
wrote:

>Hi,
>
>My KPA500 does a couple of things that seem a bit odd. Other KPA owners - 
>do your KPAs also do the following?
>
>1) When I transmit a 500 watt carrier while displaying TEMP the displayed 
>temperature drops 5 degrees C. When I release the key the temperature goes 
>immediately back to the real value. Lower transmit power levels cause a 
>correspondingly lower drop in displayed temp. This behavior causes the temp 
>display to bounce around while transmitting CW.
>
>2) When I power down my KPA the fan turns on (as it should) and then the 
>right most POWER LED flashes on an off quickly. Is that LED flash normal?
>
>Thanks and 73,
>
>Mike - ke5akl
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html


-----
eMail ist virenfrei.
Von AVG überprüft - www.avg.de
Version: 2012.0.1913 / Virendatenbank: 2112/4801 - Ausgabedatum: 10.02.2012