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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: your thought on this please . single GZ34 vs 2 x EZ81 parralell for preamp duty posted by lovetube on July 21, 2014 at 00:33:35:
Work out your current draw and look up the voltage drop of a GZ34 and a 6CJ3 (and EZ81 and others). In a typical preamp the 6CJ3 will drop a whole lot less voltage .. typically 5v or so I guess.
So the dynamic voltage drop with varying load current will be very low with a 6CJ3. Combine this with a highly over spec mains TX and low DCR chokes and you'll have a robust, powerful, dynamic PSU with no need for active voltage regulation (and unreg sounds sweeter to my ears).
Only drawbacks are, you need 2 6cj3's i.l.o. 1 GZ34; and it needs a highish current 6.3v supply. But then again, 6CJ3's are cheap (and sound very good indeed!), whereas a metal base GZ34 costs hundreds of UK pounds ....
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- 6CJ3 - Mike C 13:56:15 07/25/14 (0)
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