Most any high vacuum rectifier can be swapped for another as long as you
follow the ratings and pin outs. Dont use a 5Y3 in place of a 5U4 if the
ratings will be exceeded. You caalways go the other way but the 5U4 draws
another 1A of filament current.
If a socket change is OK then the 80/5Y3 and 5Z3/5U4 are OK. A 6X5 can
replace an 84/6Z4.
Carl
KM1H
----- Original Message -----
From: "John King" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Tuesday, December 18, 2007 9:48 AM
Subject: [AMRadio] Rectifier tubes
Can another tube such as 5Y3 or 5U4 be substituted for
5Z4? Have you done it? 73, John, K5PGW
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