KPA presents high SWR to rig

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KPA presents high SWR to rig

vu2cdp
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Hi all,

Using KPA-500 with an FT 2k. All was well until last weekend when suddenly the rig shows high SWR when i put the amp in OPER mode. The SWR checks out fine on the rig's in-built meter when the amp is in STBY mode. But cannot get the rig to key the amp as the needle on the rig's meter swings wildly to the right the moment i put the amp in Operate.

I saw a couple of posts in the archives similar to mine but could't find any solutions from them. Can anyone help in identifying the cause of such behaviour and the fix?

73,
Deepak VU2CDP