Olaf,

Your best answer will come from Elecraft support.

73,
Don W3FPR

On 2/3/2020 4:10 PM, [email protected] wrote:

We have a KPA500 in our station setup of HU1DL.

After some days of operation (and changing of bands, filters, antennas),
the T/R pin diodes are blown (D8/ D9).

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