What's better than a 5R4GY?

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Posted by andy evans (A) on May 26, 2011 at 13:52:32

I've tried a large number of rectifiers in my 300b SET - GZ37, GZ32, GZ33, GZ34 (all Mullard) and then 5U4G (various types) 5T4, 5V3A......

The 5R4GY comfortably beats them all. Nice crisp mids and the best treble. Probably 5V3A second best.

The voltage range for the HT went from 376 for the 5R4GY to 388 for the 5U4GB. Not a huge difference. 5V3 in the middle.

Usefully the 5R4GY is 2A, but it takes a 4uF cap so can't just be substituted in equipment. I'm using a 10uF cap right now - nothing's gone wrong so I don't know if that's within the safety limits of the tube - anyone know?

Anyway, what's better? Maybe some of the German tubes?

The only obvious thing I can think of is doubling up on smaller rectifiers like 80 or the wonderful AZ1 mesh. Would need input of around 385vAC, current around 140 to 150mA

Interested in other views here.

andy

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Topic - What's better than a 5R4GY? - andy evans 13:52:32 05/26/11 (17)

RE: What's better than a 5R4GY? - Neff 06:45:28 05/29/11 (0)

Directly heated rectifiers you are hearing - drlowmu 11:25:54 05/27/11 (2)

Minimum PT secondary DCR - Palustris 13:14:48 05/27/11 (1)

I don't give a hoot !! - drlowmu 13:49:16 05/27/11 (0)

RE: What's better than a 5R4GY? - Al Noakes 06:01:44 05/27/11 (0)

RE: What's better than a 5R4GY? - hifipaul 05:10:10 05/27/11 (0)

RE: What's better than a 5R4GY? - Salectric 18:01:18 05/26/11 (3)

RE: What's better than a 5R4GY? - Chris O 19:29:29 05/26/11 (2)

100uF sounds like a lot!! - andy evans 22:45:58 05/26/11 (0)

RE: What's better than a 5R4GY? - Salectric 19:39:10 05/26/11 (0)

RE: What's better than a 5R4GY? - Eli Duttman 17:08:03 05/26/11 (1)

Hmmmm damper diodes. - andy evans 22:55:21 05/26/11 (0)

RE: What's better than a 5R4GY? - Tre' 14:12:33 05/26/11 (2)

This is really useful - andy evans 22:44:03 05/26/11 (1)

RE: This is really useful - Tre' 08:11:32 05/27/11 (0)

RE: What's better than a 5R4GY? - dadbar 13:57:46 05/26/11 (1)

RE: What's better than a 5R4GY? - andy evans 14:10:29 05/26/11 (0)

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