LL2755: Lundahl Output Transformer

The Lundahl LL2755 C-core output transformers for tube amplifiers have a primary impedance of 11K and secondary impedances of 8R. There are options for circuit topology, push-pull, or single-ended, which you can select when you purchase. Suitable to use with 813 valves.

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 LL2755 is available in 2 versions. (The air-gap is adjusted during manufacture to suit)

• Push-Pull
• 60mA 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)

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

• 11K : 8R

Overall dimensions including pins - 148mm x 103mm x 95mm

PRICE (1 off)
£286.74 +vat +p&p

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