LL9202: Lundahl Output Transformer

The LL9202 is available in 2 versions. (The air-gap is adjusted during manufacture to suit)

• 50mA Single-ended
• 85mA Single-ended

(N.B. The purpose of the airgap is to accept the DC current of the output valve without saturating the core, leaving enough headroom for the sound signal)

There are further 2 versions depending on what C-core material you require.

• Silicon-iron
• Amorphous-iron (AM)

The constructor can adjust the following primary and secondary impedances depending on how the winding sections of the transformers are wired together via the exposed solder pins.

Primary impedance: Secondary impedance

• 23K: 8R or 16R
• 11K: 4R, 8R or 16R
• 6K5: 4R, 8R or 16R

For more information on this product, please click HERE