K&K Audio / Lundahl Transformers

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About LL1664

118.163.199.181

Posted on September 2, 2016 at 09:06:12

aacckkeerrmmaann@yahoo.com.tw
Audiophile

Posts: 2
Location: Taiwan
Joined: September 2, 2016

Hi,
What 's the different between LL1664 50ma and 100ma?

The limit of maximum plate current?

I read the datasheet which specifies that both types are the same
except the primary inductance values...

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RE: About LL1664

KevinC

13:54:02 09/07/16

...

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RE: About LL1664

KevinC

13:54:02 09/07/16

RE: About LL1664 , posted on September 7, 2016 at 13:54:02

KevinC
Manufacturer

Posts: 2984
Location: NC
Joined: April 19, 2001

The 50mA version is gapped so that the magnetic field is centered roughly in the most linear region when 50mA of current is passing through the primary winding (in series). The 100mA version has a larger core gap to achieve the same goal with 100mA of current. The maximum current spec is determined by the wire resistance, not the core gap, as it's a thermal limit for the coil wire.

Kevin Carter
K&K Audio
www.kandkaudio.com