Amp Maker 18W Push Pull output transformer

£49.31 (Excl VAT £41.09)

Ampmaker 18W Push Pull Output transformer.

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SKU: PWPP18W8K0A-CL Categories: , , , ,


Designed for amps with a pair of EL84; 8k ohms primary, 8 and 16 ohm speaker outputs
The latest version of this transformer is a direct clone of the transformer originally made by Danbury. That transformer came from my search for an output transformer for my PP-18 amp kit (a stripped-down version of the classic Marshall 18W amp of the ’60s). There were some British OTs available off-the-shelf (supposedly made for Marshall in recent years), but they seem designed down to a size – as if to fit into a 1U rack mount box – and they didn’t sound very good when the amp was pushed.
It’s designed for use in a typical 2 x EL84 valve power amp, but would work fine in any push-pull output stage of 15-20W that requires an 8k ohms primary impedance. It has 8 and 16 ohm speaker taps. It’s clamp-mounting, with flying leads for connections.


High quality Grain Orientated M6 0.35mm.
Hand laminated for the best stacking factor, and accuracy.

Winding wire

High quality virgin enamelled copper wire.
Wound using CNC winders for highly accurate wire placement and turns count.


8000 Ohms
Inductance 14H at 1KHz
Leakage inductance 40mH


8 Ohm and 16 Ohm

Power rating


Connecting wire

High quality PVC 300V
20AWG UL1581

Additional information

Weight 1.01 kg


Here are dimensional diagrams for this choke.
Please refer to the relevant key below for the dimensions.


Clamp Drawing Key

Label Description Dimension (mm)
A Width 76
B Height 64
C Depth 57
D Core depth 29
E Mounting distance 92
F Hole width 5


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