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Old 10th February 2004, 09:03 AM   #1
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Default Amp identification wanted

Does anyone know this amplifier? It is labelled "Vulcan 240", the manufacturer is "Unison Soundsmiths Corp." - which doesn't seem to be the well known Italian brand "Unison Research". Any information welcome!
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Old 10th February 2004, 11:23 AM   #2
GeirW is offline GeirW  Norway
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ciao.

am prolly way off.
what`s the approx. year.?
Mr. Abrahamsen at norwegian "electrocompaniet"
did make a huge amp.. named Vulcan.. i think..
(more of a experiment.. as he wanted to try "watercooling"..)
is it something like that.?



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Old 10th February 2004, 12:10 PM   #3
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Hi,

Somewhere in the early Nineties I heard it's bigger brother, the 280 at the Frankfurt Hi-Fi Show.

If I remember correctly this was an Italian manufacturer...
Other than that...

Cheers,
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Old 11th February 2004, 12:51 PM   #4
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Hello,
I see you have a Vulcan 240. The story behind this amp is this. It was designed in Canada by Franco Vila, a somewhat poor business man, but apparently a terrific designer. He even wound the transformers himself using a machine he built. He is no longer in the audio business, having sold the rights, spare parts and plans to a fellow by the name of Mark Schrauen (also in Canada). The amps are still being produced in made to order quantities. Your amp probably came via the Asian distributor Franco had early on.

I have personally repaired about a dozen of these amps. Every amp was slightly different in parts and construction. The owners of them, love them. It is a service tech's worst nightmare though.

One hint - use the best quality output tubes you can. The unit should auto bias them.

Please note, that the above mentioned people do not service or support these amps. I have some circuit details if your interested.
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Old 6th April 2010, 06:40 PM   #5
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Does anyone has a schematic for Vulcan 280 amplifier designed by Franco Vila of Toronto, Canada? Do you mind sharing it? I have a unit that's not working properly and have a difficulty time fixing it. Thanks.

Bao
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Old 27th May 2013, 04:17 AM   #6
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Hello folks, I was the one who built the 4 tube driver/ pre driver hardwired point to point circuits for the Vulcan 240 just as they were changing to the Vulcan 280. I built about 100 of these circuits whereas 2 circuits per amp giving it 8 tubes for just the driver circuits alone.

Never was I given the chance to hear a Vulcan power amp, but I just know it should sound incredible. One of the nicest looking HI-FI power amps ever made.

Symetra
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Old 29th July 2013, 08:21 PM   #7
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Default vulcan 280 experience

Hi all.
A vulcan 280 has crossed my bench. Thanks to some of you I finally did get the confidence to get this back to the customer.
The main issue came from a broken off wire on the driver stage current source rider board...this board is double sided taped to the top of some transistors in a cavity that i cant figure out how to get to.
In any case with long needle nose pliers and much burning fingers I was able to bond the wire back on. These transistors also has poor skywiring...and at least on one two pins were touching.
I put this narrow board inside some large OD heat shrink tubing so it would not rattle around and short again.

in the end this amp sounds very very good. I agree the driver is well built. The thing makes 130w in pentode mode with no visible harmonics on my fft scope. In triode mode I can get to 80w before the second harmonic and third start to appear. I cant hear the difference even with carefull listening....but im used to low power SE amps.

The customer did not want me to fix the bias level display...two leds are never on but the corresponding tubes are fine. I have to say the bias display is very sexy...with subtle gradients of red to yellow to green. I stillwant to figure out how the guy got this to work ( tricolor leds) in such an analog fashion with only a dual comparator per tube. I'd love the schematic!!
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Old 17th December 2013, 03:49 PM   #8
veeman is offline veeman  Canada
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does someone in the hamilton burlington area know of a gentleman in the burlington area who owns two vulcan amplifiers. Im trying to get in touch with him *** *** **** thanks. phone number removed please PM

Last edited by wintermute; 18th December 2013 at 10:33 AM. Reason: remove phone number
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