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Tube amplifier Audio-Akustyka Auris

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Piotr Mason (HAIKU-AUDIO)

Tube amplifier named "Auris" was produced by Audio-Akustyka. According to the specification, it can work as a pentode or triode amplifier, in Push-pull or Single-ended mode, with or without a negative feedback, and in the mysterious "turbo" mode. The manufacturer does not allow peering into the housing due to the use of many "non-standard proprietary solutions". Time to break the seals and keep one's ear to the ground.

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Broadcast tube amplifier WR40 - "Ampli 40"

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Andrzej Żółtowski „ZoltAn”, Gliwice, This email address is being protected from spambots. You need JavaScript enabled to view it.

A tube amplifier mass-produced since the second half of the 50's of the 20th century. Manufactured by the State Teletransmission Company in Warsaw. WR40 "Ampli 40"  tube amplifier was a portable device designed to create small broadcasting networks and to serve as audio amplifier for mass event organized in large rooms such as sports halls, school auditoriums, and events held in the open air.

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Stereo Tube Preamplifier JJ243

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

This stereo tube preamplifier was produced by JJ Electronic. It is characterized by interesting colors reminiscent me Lotus cars competing in Formula 1 - a mixture of black and gold . I am a fan of Lotus team, so it's no surprise that I like this color combination. The only problem is the inability to take a picture in a way that surrounding objects are not reflected in the golden housing. It is presumed that one of the purposes underlying the company was to promote electron tubes produced by them (the preamplifier has as many as 8 tubes). This has been only partially successfull. Preamplifier certainly served the brand, but rather as an independent audio device, than the device equipped with tubes with JJ logo. In some copies, which I inspected I found tubes from other manufacturers.

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Amplifiers WR40/62 and WR75/62 (Ampli 40 i Ampli 75)

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Written by Andrzej Żółtowski „ZoltAn”, Gliwice, This email address is being protected from spambots. You need JavaScript enabled to view it.
Note: most of the photos can be enlarged tapping on them with the mouse.

In 1963, the State Teletransmission Company in Warsaw started the production of amplifiers marked as WR40/62 (Ampli 40) and WR75/62 (Ampli 75). Very similar to much earlier model WR40 in fact they were improved and completely redesigned acoustic devices. Like their predecessor, amplifiers were intended to create a small broadcasting networks and to use in schools, small factories, large sacred halls, sports stadiums, train stations and events held in the open air.

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The QUAD 22 Control Unit

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

QUAD 22 preamp was designed to work with one (mono system) or two (stereo system) QUAD II amps. Its features, in particular, interchangeable external modules predestined it to act as an audio system control device. This has been reflected in the name of the device, which identifies them not as a typical preamp but the control unit (full, original name is "The Quad 22 Control Unit." Due to the fact that even the manual is common for QUAD 22 Control Unit and QUAD II amplifier, photographic presentation begins with a few shots of full audio system designed for stereo reproduction.

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Bridge tube amplifier ARG 6S33S

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

The amplifier belongs to the group of devices produced in such a small number of copies that it's creator is hardly called a manufacturer. The amplifier does not have any notes or signs and to find information about the person who built it is almost impossible. It turns out that it is the product of (a term a bit exaggerated) manufacturer named ARG. The ARG "company" it is probably one person, Mr. Eugene Kremiński from Lviv. I have not found any corporate website or the official list of ARG products. The only source of information are online "notes" of a few users, or friends of the amplifier's builder. I decided to put the amplifier in the gallery because of its quite unique schematic configuration. It is a circlotron .

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Tube amplifier 100 BIS

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Grzegorz "gsmok" Makarewicz, This email address is being protected from spambots. You need JavaScript enabled to view it.  (opracowanie z 13.07.2004r.)

After the PS-1 control unit, I became the proud owner of 100Bis tube amplifier. This amplifier and PS-1 control unit constitute  an electroacoustic set. More specifically, the set includes two such amplifiers and one control unit. Amplifier, which is presented below is of excellent condition. The only apparent damage (except for scratches resulting mainly from improper storage) is a small loss of the plastic shield, which acts as an amplifier decorative front panel.

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Tube amplifier STA25 Renaissance

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

I would like to present some photos of a very interesting STA25 Renaissance tube amplifier manufactured by Woodside Electronics. It's basically a modernized version of the amplifier produced by Radford. The main difference relates to the regulation of quiescent current of output tubes. The amplifier is characterized by interesting and controversial design line. Like previous Radford products, it raises big emotions - from admiration to total criticism.

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XINDAK MT-3

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Grzegorz 'gsmok' Makarewicz

The mid-range tube amplifier. The traditional solution arrangement with nonconventional possibility to switch between triode and pentode mode. The information appearing in many places that it is an amplifier with autobias that doesn't require adjusting the quiescent current of output tubes  encouraged me to publish a short description and not as a short set of photographs of this device. This is not true that amplifier has autobiasing. I warn users of the amplifier before carefree approach to this important issue.

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Balanced Monoblocks BAT VK-150SE

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

BAT VK-150S is a powerful tube monoblock offering considerable output power of 150W/4Ω. Let no one be fooled by the "SE" symbol in the amplifier name. It is not Single Ended circuit configuration but only a special version of the device (Special Edition). Unfortunately, I do not know the details that distinguish ordinary amplifier versions of the SE version. Based on expert mentions in the press, the details are very important but supposedly secret .

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