[Elecraft] KPA500 270V Error

[Brian F. Wruble]

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
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