K&K Audio / Lundahl Transformers

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LL1660/18mA 4.5:4

201.79.215.97
Posted on December 12, 2014 at 10:24:03
SandroN
Audiophile

Posts: 3
Joined: December 12, 2014
 I need it as interstage near 1:1. Driver is 6n6p SE.
Would it be better 4.5:4 over 4:4.5?
How should be the connections this way? I think its important the right connection sequence to avoid high transformer capacitance.
Thanks.

 

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RE: LL1660/18mA 4.5:4, posted on December 12, 2014 at 10:40:24
KevinC
Manufacturer

Posts: 2984
Location: NC
Joined: April 19, 2001
 I agree that 4.5:4 is slightly preferable to 4:4.5. Wire it as the inverse of Alt S with the tube plate connected where the grid is in S and B+ to where ground is in S. So B+ goes where ground is and ground goes where B+.


Kevin Carter
K&K Audio
www.kandkaudio.com

 

Thanks. 4:gnd 9:grid 16:b+ 21:plate(nt), posted on December 12, 2014 at 12:31:03
SandroN
Audiophile

Posts: 3
Joined: December 12, 2014
 .

 

RE: Thanks. 4:gnd 9:grid 16:b+ 21:plate(nt), posted on December 12, 2014 at 18:17:30
JKT
Audiophile

Posts: 612
Location: Midwest
Joined: November 26, 2002
 You should consider using 6N30s. I know they are ~5X more expensive but I never got more than 6 months out of 6N6Ps in my phono pre and lines stage. With 6N30s I'm getting more than 2 years of use. Plus 6N30 have more dynamic headroom and sound better to boot.


"It is better to remain silent and thought a fool, then speak and remove all doubt." A. Lincoln

 

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