LL1663: Lundahl Output Transformer

The Lundahl LL1663 C-core output transformers for tube amplifiers have a primary impedance of 5K with secondary impedances of 8R or 16R, depending on how you wire them up. There are options for circuit topology and core material, which you select when you purchase.

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 LL1623 is available in 3 versions. (The air-gap is adjusted during manufacture to suit)

• Push-Pull
• 50mA Single-ended
• 100mA 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 2 versions depending on what C-core material you require.

• Silicon-iron
• Amorphous-iron (AM)

Primary impedance: Secondary impedance

• 5K: 8 or 16R

Overall dimensions including pins - 95mm x 75mm x 50mm

STARTING PRICE (1 off)
£118.89 +vat +p&p

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