K&K Audio / Lundahl Transformers

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phase splitting with lundahl 1540

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Posted on April 15, 2014 at 13:04:03
jerwer
Audiophile

Posts: 10
Joined: November 22, 2003
 hello
i want to use lundahl 1540 input trannies as phasesplitter . i am wondering how to connect the secondairies for phase splitting . (the lundahl pdf is no help to me ) .
thanks and greetings from holland

 

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RE: phase splitting with lundahl 1540, posted on April 15, 2014 at 13:29:11
KevinC
Manufacturer

Posts: 2984
Location: NC
Joined: April 19, 2001
 Use the left diagram datasheet connections, but make the pin7-5 connection the center tap, pin 8 +phase and pin 6 -phase.

Kevin Carter
K&K Audio
www.kandkaudio.com

 

phase splitting with lundahl 1540, posted on April 15, 2014 at 16:52:36
jerwer
Audiophile

Posts: 10
Joined: November 22, 2003
 Hello Kevin
thanks for your reply
It is not clear to me , i use unbalanced input on the primairy ( they call it assymetric , i guess ) On the secondairy I need 2 outputs
1 normal and 1 reverse ( 180 degree phase shifted ) so + and - normal and + and - phase shifted 180 degrees
Can you point out again which connections to be made ?
thanks in advance

 

RE: phase splitting with lundahl 1540, posted on April 15, 2014 at 17:08:20
KevinC
Manufacturer

Posts: 2984
Location: NC
Joined: April 19, 2001
 If you want a very specific type of connection that is correct for your project rather than more general advice, you will need to provide a schematic of the circuit that the LL1540 is meant to feed.


Kevin Carter
K&K Audio
www.kandkaudio.com

 

phase splitting with lundahl 1540, posted on April 15, 2014 at 17:50:18
jerwer
Audiophile

Posts: 10
Joined: November 22, 2003



hello Kevin
I use a tube preamp with low ouput impedance (300-400 ohm ) (unbalanced )
I want to use the schematic as shown in the picture or similar
What are the connections on the secondairy side of the LL1540 (pinnumbers (+/_) and 180 degr reverse (+/-)

 

RE: phase splitting with lundahl 1540, posted on April 16, 2014 at 09:15:05
KevinC
Manufacturer

Posts: 2984
Location: NC
Joined: April 19, 2001
 Sent schematic by e-mail.

Kevin Carter
K&K Audio
www.kandkaudio.com

 

phase splitting with lundahl 1540, posted on April 16, 2014 at 09:53:04
jerwer
Audiophile

Posts: 10
Joined: November 22, 2003
 Hello Kevin,
It,s now all clear
many thanks for your reply .

 

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