KAT100 ESD protection

[John Rader]

What is the best way to protect a KAT100 from ESD while in a Pelican case?
Last year I had to replace the1N5711s, D1 & D2, after flying with my K2.
John K5XTX

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[W9DHI]

Put a shorting plug into the antenna jacks to short them all to ground, that
will protect the diodes on the bridge.

Gregg R. Lengling, W9DHI, Un-Retired
K2/100 SN 3075
http://www.milwaukeehdtv.org

----- Original Message -----
From: "John Rader" <[hidden email]>
To: <[hidden email]>
Sent: Saturday, December 25, 2004 2:40 PM
Subject: [Elecraft] KAT100 ESD protection

> What is the best way to protect a KAT100 from ESD while in a Pelican case?
> Last year I had to replace the1N5711s, D1 & D2, after flying with my K2.
> John K5XTX
>
> _________________________________________________________________
> On the road to retirement? Check out MSN Life Events for advice on how to
> get there! http://lifeevents.msn.com/category.aspx?cid=Retirement
>
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> Elecraft mailing list
> Post to: [hidden email]
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[John Rader]

Gregg,
Thanks for the input. I had a short jumper with bannana plugs that plugs
into the ground post and SO-239.
Merry Christmas,
John K5XTX

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[Marcus Busch [DL1EKC]]

Hi All,

On 25 Dec 2004 at 14:40, John Rader wrote:

> Last year I had to replace the1N5711s, D1 & D2, after flying with my K2. John

This is really interesting. I'm just facing the same trouble. During last
WAG field operation I used my K2 with everything being fine. At the end of
the contest I switched off the RIG. When I came back two days later D1 and
D2 in my KAT100 had broken down (Vr = 1.5 V as measured with my DMM). The
coax line had been connected during the two days, but they were connected
via a remote antenna switch, which grounds all inputs when not in use.

There was no thunderstorm and I can hardly believe it was an ESD issue.
Are the diodes really that sensitive?

Is there a more robust replacement available? What about a protection
circuit?

VY 73 de Marcus, DL1EKC

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