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Tube Amplifier MELOMAN 25

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Grzegorz "gsmok" Makarewicz, This email address is being protected from spambots. You need JavaScript enabled to view it.
Note: 12.02.2012r. added the original diagram of the amplifier

Tube amplifier produced by POLKAT Wroclaw. The design quite controversial when it comes to opinions of holders. Unfortunately, you have to say "let the veil of silence falls on the quality of its assembling". I think, that pictures presented below speak for themselves. I do not mean, of course the damages associated with the normal operation and storage of the amplifier, but the details of construction and the way they are performed by a "qualified" person with blacksmith skills. I think, the best summary of the amplifier can be opinion of Romek (Romekd) presented on TRIODA community:

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Audio Research Classic 60

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Grzegorz "gsmok" Makarewicz, This email address is being protected from spambots. You need JavaScript enabled to view it.

In my private beauty contest of tube amplifiers that have come into my hands, for years the first place take tube amplifiers produced by Radford (especially the STA-25). Amplifiers with lower ratings are separated from Radford by greatl gap. That was until my personal encounter with Classic 60 amplifier, produced by Audio Research. Although compared to "Radford", "Quad" and other old tube amplifiers it is a real lad (construction was established in 1989), its appearance aroused in me a shiver of excitement. No doubt - second place in the ranking .

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Tube amplifier MV3

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Photographs and description by Zoltan.
(Andrzej Żółtowski, This email address is being protected from spambots. You need JavaScript enabled to view it.).

Mass-produced in the sixties by the East German company VEB Kligenthaller Harmonikawerke (later VERMONA) in Kligenthall, two inputs, microphone - instrumental amplifier MV3, despite the relatively small (12W) output power was extremely successful device in its class.

With the forming of the complete audio system, broadband loudspeaker, MV3 amplifier was the object of sighs and dreams of most chamber music groups, both amateur and professional, from those years because of an exceptionally dynamic and wonderfully "full" sound.

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6S33S SE Amplifier on Plywood

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Grzegorz "gsmok" Makarewicz, This email address is being protected from spambots. You need JavaScript enabled to view it.  (written in 2006)

For some time I had the intention to build an amplifier based on the famous "devil" tube 6S33S (6C33C). I heard about this tube a lot of contradictory opinions. The fundamental flaw mentioned, is the time instability of it's parameters.  Unstable anode current during operation of 6S33S tube is a constant theme in almost every discussion board dedicated to electron tubes. With all its disadvantages 6S33S tube is mysteriously attracted for audio designers. Why? I do not know. Probably anyone who used this tube had their own reasons. As for me there are also several important reasons. I will mention one - it looks very cool, and these "devil's horns" - amazing!!!

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