Amp Ideas for spare Donuts

[Super_BQ]

My Luxman M-117 amp has packed up and may have to look for a amp replacment.

At my disposal, I have a pair of rather large Plitron donuts laying around. 2 x 0-40V secondaries.

Any ideas on a suitable amp I could make?

BQ

[roddyama]

What kVA are they?

[Super_BQ]

Oops.. I forgot the most important part!

They're 2KVA!!!!

BQ

[Brian Donaldson]

Big assed Aleph X. Now you need a big assed set of heatsinks

[roddyama]

That would be an extremely high output AX. You do a pair of Aleph 2's with double the output devices or a pair mono Aleph 1.2.

[Super_BQ]

For some reason, i'm beginning to like the idea of building the SoZ again for the simple reason that a variac can be used. (Lack of any voltage regulators)

Since most of the time we listen to music in the 1st watt, I can have the variac set at a low voltage. Not enough power? Just turn that dial!

Comments?

Here at my disposal, I have some pretty big heatsinks I can use.

BQ

[Brian Donaldson]

Oops, I was thinking 40vct. Yes Aleph 2+. 100 watts @ 8ohm with current to spare.

[roddyama]

Originally posted by Super_BQ
For some reason, i'm beginning to like the idea of building the SoZ again for the simple reason that a variac can be used. (Lack of any voltage regulators)

Since most of the time we listen to music in the 1st watt, I can have the variac set at a low voltage. Not enough power? Just turn that dial!

Dial-a-Watt. You can have that big variac knob sticking out of the front panel next to one of those big Frankenstein on-off knife switches.

[GRollins]

Use a large inductor as the entry point for your power supply filter. Something like an LC or LCLC. This will actually drop the rail voltage a bit if the coil is big enough. On the plus side, you will have a power supply that can deliver more current than an equivalent cap input filter.

Grey

[AGGEMAM]

Originally posted by GRollins
Use a large inductor as the entry point for your power supply filter. Something like an LC or LCLC. This will actually drop the rail voltage a bit if the coil is big enough. On the plus side, you will have a power supply that can deliver more current than an equivalent cap input filter.

Just be sure that the inductor have very low series resistance or it could nastily hot. Also note that if the front inductor fails for some reason the voltage will rise approximately 20%. Otherwise a very good solution.