LL1691: Lundahl Output Transformer

The LL1691 is a dual coil C-core tube amplifier output transformer for 9K: 8R impedance ratio available in PP and SE versions. Ideally suited for use with the 845 valve. The coil is wound using our high internal isolation technique with isolation foil between each copper layer. The core is an audio C-core of Lundahl's production.

The transformers are highly sectioned with harmonically sized sections, which results in a minimum leakage inductance. Combined with a low capacitance coil winding technique, this results in a wide frequency range. The transformers have a special audio C-core of our Lundhal`s production, which is gapped for the desired DC current. This would depend on the current draw of the output valves. The transformers are of an open frame type and are suitable for mounting inside an amplifier housing.

The LL1691 is available in 2 versions. (The air-gap is adjusted during manufacture to suit)

• Push-Pull
• 70mA 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)

Primary impedance: Secondary impedance

• 9K: 8R

Overall dimensions including pins - 148mm x 103mm x 90mm

PRICE (1 off)
£286.74 +vat +p&p

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