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"There is a "pulse" tube that is a very heavy duty
version of the 6146 and can be substituted without any
problems.  This is the 6293.  A 6293 will outlast a
"plain" 6146 by at least 5 times the life (over 10
times is not that unusual!).  We would "kill" back in
the late 1950s and early 1960s to get our hands on a
pair of 6293 tubes for our DX-100s, etc."
73 -- Mark, AA6DX
----- Original Message ----- 
From: "Lloyd" <kk7iz at cox.net>
To: "For Sale_ Swap" <forsale-swap at mailman.qth.net>
Sent: Thursday, April 15, 2004 1:08 PM
Subject: [ForSale-Swap] Question on tubes


> Is the 6293 a sort of ruggedized 6146?