LL2763: Lundahl Line Output Transformer

LL2763 is a line output transformer for tube amplifiers. The transformer is available in copper or silver wire versions. The transformer primaries are wound with a special low-capacitance winding technique to achieve the best high-frequency performance. The transformer has a special high flux, low distortion audio C-core of Lundahl's production. It is also available with a custom-made amorphous C-core. The core air gap will be custom-set for your application The PP (Push-Pull) version is assembled with a small core air gap to allow for some DC current unbalance for the S.E. versions of the LL2763, and the core air gap is chosen such that the denoted DC current (7mA for a LL2763/7mA) generates a no signal core flux density of 0.9 Tesla when used with all primaries in series. This leaves a flux density swing of approx. +/- 0.7 T for the signal.

The LL2763 is available in 2 versions to suit the circuit topology. (The air gap is adjusted during manufacture to suit)

• Push-Pull
• 7mA 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)

And a further 2 options depending on what wire you require.

• Copper
• Silver (Ag)

Turns ratio

• 4 + 4 : 1 + 1 + 1 + 1

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

STARTING PRICE (1 off)
£103.03 +vat +p&p

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

For more information, please refer to the datasheet below.