[ARC5] 6AG7 and 6AG7Y

[Fuqua, William L.]

The 4CX300Y has 400W plate dissipation rather than 300W.
Clearly the numbering schemes are different for the receiving tubes and transmitting tubes.
Thanks
73
Bill wa4lav

________________________________
From: Robert Downs <wa5cab at cs.com>
Sent: Monday, July 19, 2021 1:52 AM
To: Fuqua, William L. <wlfuqu00 at uky.edu>; arc5 at mailman.qth.net <arc5 at mailman.qth.net>
Subject: RE: [ARC5] 6AG7 and 6AG7Y

CAUTION: External Sender


As several others have written, a “Y” suffix when found on any metal octal tube means that the tube has a low-loss base.  So it will perform better at its upper frequency limit.  I will add that the “Y” suffix is generally an acceptable replacement for any metal octal type (and most G and GT types) except maybe the “W”.  But that statement only applies to octal tubes.  I have no idea what the “Y” signifies on a 4CX300Y.



Robert Downs



From: arc5-bounces at mailman.qth.net [mailto:arc5-bounces at mailman.qth.net] On Behalf Of Fuqua, William L.
Sent: Sunday, July 18, 2021 19:20
To: arc5 at mailman.qth.net
Subject: [ARC5] 6AG7 and 6AG7Y



Does anyone know the difference between the 6AG7 and 6AG7Y tubes?

Can't find full spec on Y but I do know there is a big difference between the 4CX300A and 4CX300Y tubes.

Maybe the 6AG7Y is later more durable tube???



73

Bill wa4lav
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