LL1677: Lundahl Interstage Transformer

LL1677 is a high-current interstage transformer with a 1:2 step-up ratio. To achieve the best high-frequency performance, the transformer is wound with a special low-capacitance winding technique. The transformer has a unique high flux, low distortion audio C-core of Lundahl's production. For the LL1677, the core air gap is chosen such that the denoted DC current (80mA for a LL1677/80mA) generates a no signal core flux density of 1.2 Tesla when used with all primaries in series. This leaves a flux density swing of 0.4 T for the signal.

The LL1677 is only available for push-pull operation. (The air gap is adjusted during manufacture to suit)

• 80mA 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 : 4 + 4

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

STARTING PRICE (1 off)
£96.59 +vat +p&p

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

For more information, please refer to the datasheet below.