LL2731: Lundahl Line Output Transformer

The LL2731 is a four-sectioned dual coil C-core tube amplifier interstage / line output transformer for low-impedance applications. LL2731 is available in PP and SE versions. The coil is wound using our standard high internal isolation technique with isolation foil between each copper layer. The core is an audio C-core of Lundahl's production.

The LL2731 is available in 3 versions to suit the circuit topology. (The air-gap is adjusted during manufacture to suit)

• Push-Pull
• 10mA Single-ended
• 20mA 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 3 versions depending on what C-core material you require.

• Silicon-iron (STANDARD)
• Amorphous-iron (AM)
• Nanocrystalline (NC)

Turns ratio

• 1 + 1 : 1 + 1

Overall size including pins -73mm x 61mm x 53mm

STARTING PRICE (1 off)
£89.26 +vat +p&p

Non-Stock Item - Please allow 4-6 weeks for dispatch

For more information, please refer to the datasheet below.