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[Amps] 813's

To: <>
Subject: [Amps] 813's
From: "Jim Thomson" <>
Date: Tue, 22 Dec 2015 06:19:39 -0800
List-post: <">>
Date: Mon, 21 Dec 2015 10:57:04 -0800
From: Tom Osborne <>
Subject: [Amps] 813's

Why are 813 tubes considered 'dirty'?

I have an old amp in the attic I haven't used for a long time that has a
pair of 813's in it  I have read somewhere that they are a very 'dirty'
tube.  I'd assume that means lots of spurs or something.

Just wonder why that would be.  73

###  By  dirty.... they mean lousy  TX  IMD. Nothing to do with spurs  etc. 

Jim   VE7RF

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