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This is probably just me fantasizing but I have a great interest in the old Melos triode monoblock amps(either the big 400 watt ones or even the rare 200 watt amps). They've been out of production a long time but there were a fair number of them made. But I rarely see any for sale. Any thoughts on locating them. For the right price I'd be tempted especially since I know the people to help me get a pair in shape. I'd also be interested in the smaller one chassis stereo versions as an alternate although they aren't quite a interesting to me because the front ends are single ended unlike the all push/pull mono blocks.
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Here is a MELOS HC 180 Massive tube amp, 75 watt triode stereo, in Grandville Michigan. A place call Way-Back Audio. They want $2,500. Maybe bridge you till you find what you want.
My memory and I hung around the factory when they were in NJ was that the 75 watt version was single ended and I have problems with single ended even at 75 watts per channel. But thanks for the reference.
"tube amp featuring El509 power tubes."
Apparently, they are triode in name only as the EL509 is a pentode not a triode.
It's screen drive which makes the 519 into a very good triode with very nice triode curves. The Berning Audionics BA150 used the 509 tube in a similar manner.
Yes, the EL509 is probably best known as a "screen drive" pentode. I still think it was the marketing department that came up with the idea of calling it a "triode" amplifier.
The cures are triode curves not pentode curves. It's a triode driver and a good one with nice linear spacing. If you knew the people that used this design such as David Berning and Mark Porzilli, you'd know that they really don't even know marketing.
can be wired to operate in triode.
My VTL MB-450s offer switchable tetrode and triode operation using 6550C outputs. Naturally, power output is reduced when running triode. In the case of the 450s, power drops from 300 watts tetrode @ 8 ohms to about 200 triode.
I find that each mode of operation offers particular sonic advantages and use different settings for different music and moods.
Could be triode wired.
Dave
You may well be correct. I'm not familiar with the amp but knew Way-Back had a Melos amp for sale. I quoted what they posted in their online advertisement. Sorry for the error.
I had both versions. Both the stereo and the monoblocks. Very good sounding.
The problem with them was they were time bombs waiting to happen and once they did most just discarded them. I do have a chassis with the iron on them but the front end boards were discarded. If you want it email me personally and we can talk or call me at 516-694-2930. Might be a nice project.
The main issue was when they broke you couldn't trace the parts because all the numbers were removed. The schematics went bye bye when the company folded. So all those when broken were just nothing except for very expensive transformers.
Parts numbers removed- you mean caps, resistors, etc? That is just plain silly and would be a big red flag for me saying run away, avoid this brand.....
And yet I know a set of monoblocks working for over 15 years. I know this is a sample of 1 but I suspect things aren't as bad as your experiences. And I suspect the early ones were a bit less reliable. They ran at higher voltages. And they were more powerful. The 400 watt rating was just for advertising. They were more powerful than that by quite a bit.
That explains why you don't see them much!
Dave
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