From jdekor–(at)–oncepts.nl Thu Apr 3 12:42:22 CST 1997
Article: 27848 of rec.audio.tubes
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From: “Jim de Kort”
Newsgroups: rec.audio.tubes
Subject: Re: GZ37 vs GZ34 for tube rectifiers
Date: 3 Apr 1997 18:18:45 GMT
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> Yup. FYI, the GZ-34 is the European designation for the 5AR4, and the
> GZ-37 is a 5U4.

That’s not entirely true. The GZ37 and 5U4 have almost the same specs but
these are two different tubes. The GZ36 = CV837, but it is not the same as
a 5U4 although it can be used to replace it.

Jim