[Elecraft] KPA500 270V Error

Wed Jul 3 22:59:58 EDT 2013

Hi Brian:

Other things to check are the connections to the rectifiers. They are also
spade connectors, any one of which could cause an intermittent. And, of
course P6 connecting to the PA assembly. 

There are few things worse than an intermittent. 

73, Ron AC7AC

From: Brian F. Wruble [mailto:bwruble at gmail.com] 
Sent: Wednesday, July 03, 2013 5:08 PM
To: Ron D'Eau Claire
Cc: Elecraft Reflector
Subject: Re: [Elecraft] KPA500 270V Error

Thanks, Ron.

I disassembled the top and left side panels and reassembled.  I did the test
you suggested on the interlock, and the fault was still there.  However,
after I reassembled it, it worked for awhile, then gave the fault again.

I cleared the fault, and I now have it working at very low power into a
dummy load.  I will report any return of the problem, but I sense there is
still something intermittent going on. 

Standby ...

Now, it is good into the KAT500 and from there into an antenna, at full
power.

Weird, but I like having it back.

73,

Brian

*Brian F. Wruble, C.F.A.

70 is the new 40.
*
Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077  
Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD 21930  
eFax  305.768.0278  

On Wed, Jul 3, 2013 at 8:02 PM, Ron D'Eau Claire <ron at cobi.biz> wrote:

The other suggestion in the manual is to be sure the interlock switch is
being activated by the hardware attached to the top cover.

A simple way to do that is to *carefully* close the interlock switch
manually with the top cover off. I use a plastic rod for such things, but
the insulated handle of a small screwdriver works fb too.

Remember, you must cycle the rear panel power switch after getting that
error before trying again.

If that eliminates the error, disconnect power and check the interlock
switch and the hardware on the top cover to ensure it is secure. I recall
some time ago another fellow having trouble and traced it to loose hardware
holding the switch, so it could move and fail to actuate.

Next I'd be sure the transformer tap connector fits snugly on the terminal
and the unused taps are secured to the parking terminals as shown in the
manual.

Finally, suggest using a different transformer tap and checking your line
voltage level again to be sure it's not drooping at different times of the
day. Where I live homes are all electric, including electric heat. The 115V
mains can vary between 125V and 110V, depending upon the time of day.

And then, there's Elecraft Customer support - always an excellent resource!

73 Ron AC7AC

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Brian F. Wruble
Sent: Wednesday, July 03, 2013 4:21 PM
To: Elecraft Reflector
Subject: [Elecraft] KPA500 270V Error

Hi Guys:

I completed and fired up my KPA500 yesterday.  it worked absolutely fine on
the 2 or 3 bands I tried.  Today, when I go frm STBY to OPER, I get the hard
"270V Error".  The interlock is ok, and that is the only thing the manual
suggests as a possible problem,.

I only found one example in the archives, and that led nowhere.  Can anyone
suggest what I should be looking for?

Tnx.

73 de Brian W3BW

*Brian F. Wruble, C.F.A.

*70 is the new 40.*

*
Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD 21930
eFax  305.768.0278

______________________________________________________________
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