Help me! Kpa100 broked during lightning

[Juha - oh6os]

Hello,

Yes, all cables was connected during the first lightning bolt nearby.

Now K2/10W is ok! All work fine, luckily.

But with KPA100:

1) Metering (K2 LED paragraph) do not show anything.
2) I get 10W and 100W output, but can't adjustable power.
3) KPA100 don't talk with computer, yes computers COM port is broken too.
But I tested with another working COM and the same situation; don't work.
4) Pressing TUNE K2 show "0.1  9.9-1" (10W) and 1  1.0-1 (100W).

I replaced D16 and D17 on KPA100. Nothing changed.

juha oh6os

What next



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[Dave wo2x]

Sounds like the RS-232 chip in the amp may be fried, especially if the PC com port it was connected to fried.

I’ve seen this in the public safety world. Lightning hit our phone lines coming into a PC at the site and took out every com port (multi port). Also com port on all equipment attached got zapped.

Not sure what else. I do not own the KPA100 so cannot add anything else.

Dave wo2x

Sent from my waxed string and tin cans.

> On Jul 1, 2019, at 6:30 AM, Juha - oh6os <[hidden email]> wrote:
>
> Hello,
>
> Yes, all cables was connected during the first lightning bolt nearby.
>
> Now K2/10W is ok! All work fine, luckily.
>
> But with KPA100:
>
> 1) Metering (K2 LED paragraph) do not show anything.
> 2) I get 10W and 100W output, but can't adjustable power.
> 3) KPA100 don't talk with computer, yes computers COM port is broken too.
> But I tested with another working COM and the same situation; don't work.
> 4) Pressing TUNE K2 show "0.1  9.9-1" (10W) and 1  1.0-1 (100W).
>
> I replaced D16 and D17 on KPA100. Nothing changed.
>
> juha oh6os
>
> What next
>
>
>
> --
> Sent from: http://elecraft.365791.n2.nabble.com/
> ______________________________________________________________
> Elecraft mailing list
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> Post: mailto:[hidden email]
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> Please help support this email list: http://www.qsl.net/donate.html
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[Don Wilhelm]

Juha,

Whenever I had a lightning hit KPA100 to repair, I always replaced all
the active devices (including all diodes) in the KPA100.
Even if the devices are not currently failing, there is a good chance
that they have been stressed and will fail later.

If you are using a USB to serial adapter, that was likely damaged too.

73,
Don W3FPR

On 7/1/2019 6:30 AM, Juha - oh6os wrote:

> Hello,
>
> Yes, all cables was connected during the first lightning bolt nearby.
>
> Now K2/10W is ok! All work fine, luckily.
>
> But with KPA100:
>
> 1) Metering (K2 LED paragraph) do not show anything.
> 2) I get 10W and 100W output, but can't adjustable power.
> 3) KPA100 don't talk with computer, yes computers COM port is broken too.
> But I tested with another working COM and the same situation; don't work.
> 4) Pressing TUNE K2 show "0.1  9.9-1" (10W) and 1  1.0-1 (100W).
>
> I replaced D16 and D17 on KPA100. Nothing changed.
>
> juha oh6os
>

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[Juha - oh6os]

Tnx for replies!

Have to check DC voltages first. But very sure I must to change U4 (RS-232
IC) and U1 (microcontroller) at least.

juha oh6os



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