You can inform Lundahl their data sheet is WRONG!

http://www.lundahl.se/pdfs/datash/1660.pdf

LL1660/10ma,那5842行20ma流有否太大?

2 primary coilsl of Ll1660 in series will give 10mA 1:1.125
2 coils in parallel will give 20mA 1:2.25


lf 2 primary coilsl of Ll1660 in series will give 10mA 1:1.125
2 coils in parallel will give 20mA , But the ratio is not 1:2.25
That is ohm's law

最後修改時間: 2009-12-09 22:28:04

WasteLand1922兄:
明白!!多謝賜教!!!!

各C hing:
平D既CX350/50聲如何,比2A3 & 300B如何?

w,
LL1660/10ma,那5842行20ma流有否太大?

2 primary coilsl of Ll1660 in series will give 10mA 1:1.125
2 coils in parallel will give 20mA 1:2.25

circuit diagram

Hello all Ching, this is my 300B Signle Ended using EC52 driver

http://www.tubecollector.org/cv1137.htm

WasteLand1922兄:
VT4C schematic中sowter8424改用8423,5K:5K+5K好些.
LL1660/10ma,那5842行20ma流有否太大?
有錯勿見笑!

Thank you all C Hing.
audiowen

如果用1:1 ratio IT，應該6C45P會好啲，因為

6C45P放大倍數52倍，

437A 放大倍數41倍。

Even if you use 437A or 6C45. The IT better be in a 1:2 ratio to drive 300B. But a 1:2 ratio IT usually has a worse bandwidth compare to the 1:1 IT of the same series.

From VT4C
driver tube can be Russia 6C45, 417A, 437 or 5842

wen c-hing,
give a try for Lundahl

Lundahl C-Core Interstage
cheap but good

Hi all C Hing,
I will rebuild my 2A3 to 300b, idealy 417A interstage 300B, for the meantime, please advise the schematic and the brand of interstage;

I am going to Taiwan this weekend and visit James transformer, Is it a good choice for this?

audiowen

Tango X series 中最好Data應該是X2.7S，

Primary DCR : 55ohms

Tango X3.5S應是Tango頂班係列中,data最正wor.

REN904

Driver 係 AC/HL or REN904.

wcw兄

Tango同Bartolucci既分別在放，

Bartolucci 高音Win少許，音場明顯Win，分柝力平手，其他都敗給Tango。

Tango X3.5S 勝在樣樣都好，勝在夠平均地好，還有一樣好既地方是音樂感好好，而且聽起來有一種特別輕鬆既感覺。