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[Amps] GS35B Idle Current drifting up.

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Subject: [Amps] GS35B Idle Current drifting up.
From: Paul Baldock <>
Date: Wed, 18 Dec 2013 11:48:07 -0800
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I've been running a GS35B for a year or so. Initially with B+ at 4KV I had the bias voltage set at 30V and an idle current of 200mA. The idle current has been slowly drifting up over time. Now it takes 50V of bias to get the idle down to 200mA. I can still easily get 1500W PEP out. Any idea what's happening?

- Paul  KW7Y

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