[Sander deWaal]

Eeyore said:


paul packer wrote:

On Thu, 21 Sep 2006 20:49:58 +0200, Sander deWaal
wrote:


Various other homemade or modified amplifiers like a Luxman L100 with
MOSFET outputs,


I had an L100 back in the 70s. Beautiful amp. I wonder why you thought
it needed mods?



It was broken, and since I couldn't get the original output
transistors and several other special drivers anymore, I decided to
mod it into a class A MOSFET design. Plenty of uF around, I only had
to swap the tranny though.
2 x 55V AC is too much for a class A amp with the original heatsinks
of the L100. 2 x 20V AC was more than enough, and I had to install
quiet fans at each heat sink as well ;-)

I like to restore old equipment up to its original standards, with all
the original semiconductors.
If I can't get them, I mod it into something very different.
Simple, really.

I kept the marvellous phono stage, the tone controls and the tilt
equalizer intact, save the replacement of electrolytics..
Especially the EQ tilt is a very useful function, I do not understand
why others didn't use it as well.


All the early mosfet amps had flaws. Subtle ones but readily improvable.


The L-100 used BJTs.

--
"Due knot trussed yore spell chequer two fined awl miss steaks."