Wednesday, May 24, 2006

And now for something completely different: Leak

Philippe asked if I could do a revision of his Leak Delta 70 amplifier.

It's not a Quad, all right, but it's high-end, it's the same generation and it's made in the UK as well. So I said yes, one should broaden the horizon.

The amp is a pre/power amp that is constructed very well in a modular way. The design is somewhat "outdated" but the electronics look very intelligent. In many ways the power-amp looks like the Quad 303.

A schematic is not available, but it seems to be very similar to the Leak Stereo 70, the eralier model.

Quad Spot (or is it Leak Spot now -;) will keep you posted in the next weeks. All comments and advices are welcome, of course.


Step 1: Replacing the capacitors.

Nowadays capacitors are A LOT smaller than they were in 1969. I found some "New Old Stock" capacitors of the same size, 4700 MF instead of 2000MF as output-caps. This should improve dynamics below 150 Hz.

On the boards I'll have to replace all caps that are in the signal-line.

I love this Leak-job! After revising too many Quads, send me some Leaks or Naims!



Anonymous Anonymous said...

What is the type of speaker connector these Leaks use? It looks like a 3mm & 4mm banana plug pair. Do you know? Thanks

3:43 AM  
Anonymous Anonymous said...

This is the European 2-pin DIN connector used for speaker connections in Leak transistor amplifiers. Plugs (and sockets) are available from Maplins in England.

2:37 PM  

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