Tesla AOS 095 DDL 1000 Digitální dozvukové zařízení, 1988-1992, made in Czechoslovakia

Link: czechkeys

100 mV, max 6 V
47 kOhm
220 kOhm
3 V/1 kOhm
20 Hz - 20 kHz v pásmu 2 dB
20 Hz - 10 kHz v pásmu +1 až -3 dB
Funkční vlastnosti: digitální dozvukové zařízení
Efekty: echo, delay, reverb, chorus, flanging, doubling, repeat apod.
Celkové zpoždění signálu: 1 - 1024 ms
Zpoždění pevné: 2 - 512 ms
Zpoždění plynulé: 0.5 - 2x od nastavené pevné hodnoty
Modulace efektů: mod. signál 0,1 - 10 Hz, hloubka 0 - 100 %
Napájení: 220 V/50 Hz +- 10%
Příkon: cca 12 W
Vstupní napětí: HIGH 5 mV, max. 300 mV
                         Nom. LOW
Vstupní impedance: MIGH
Výstupní napětí nom.: 1 V/1 kOhm
Vstup, výstup: 3x kon. 5-kolík DIN vzadu, 2x kon. jack 6,3 vpředu, 2x ovl. kon. jack 6,3 vzadu
Frekvenční charakteristika: přímý signál
                                            zpožděný signál
Odstup od rušivých napětí: přímý signál 80 dB
                                            zpožděný signál 65 dB
Činitel harmonického zkreslení: přímý signál: 0,3 % v pásmu 63 Hz -5 kHz
                                               zpožděný signál: 0,5 % při 1 kHz
Osazení polovodiči: IO - 67x, tranzistor - 12x, dioda - 40x                                                                                                                                                      
Ovládací prvky: viz
Provedení: viz foto
Rozměry: 482,5 x 51 x 321 mm
Hmotnost: cca 4 kg
Návod na obsluhu, schema, servisní dokumentace: dostupné
Výrobce: Tesla Vráble n.p., Československo
Typ: AOS095 (DDL1000)
Výroba: kolem roku 1988 - 1992

Grundig HF 550 Altransistor Vertical amplifier [HiFi-Studio 550 modular], 1970-1971, made in Germany

Link: radiomuseum | radiomuseum

Собран на: 4 x Siemens BD130Y

Country: Germany
Manufacturer / Brand: Grundig (Radio-Vertrieb, RVF, Radiowerke)
alternative name Grundig Portugal || Grundig USA / Lextronix
Year: 1970/1971

Category: Broadcast Receiver - or past WW2 Tuner
Semiconductors (the count is only for transistors) 45:
Main principle Super-Heterodyne (Super in general); ZF/IF 460/10700 kHz
Tuned circuits 10 AM circuit(s) 15 FM circuit(s)
Wave bands Broadcast, (BC) Long Wave (LW), 2 x SW and FM or UHF.
Power type and voltage Alternating Current supply (AC) / 110; 130; 220; 240 Volt
Loudspeaker - This model requires external speaker(s).
Power out 20 W (30 W max.)
Model: HF550 - Grundig Radio-Vertrieb, RVF,
Material Wooden case
Shape Chassis only or for «building in»
Dimensions (WHD) 260 x 370 x 200 mm / 10.2 x 14.6 x 7.9 inch

  • HiFi-Stereo-Steuerteil. NF-Verstärker mit 2 Endstufen je 10 W (Sinus). 9+1 UKW-Stationstasten, die 10. Stationstaste schaltet auf Hauptskala und Handabstimmung.
  • Einbauchassis mit Holzzarge, nussbaumfarben.
Net weight (2.2 lb = 1 kg) 9.5 kg / 20 lb 14.8 oz (20.925 lb)
Source of data Handbuch VDRG 1970/1971
Mentioned in - - Manufacturers Literature (Grundig Technische Informationen 3/1970)

Обращаю внимание на механизм переключателей:

Monarch 5500 Stereo Receiver, 1978, made in Japan

Link: radiomuseum

Собран на: 4 x Toshiba 2SD371 (оригиналы)

Country: Germany
Manufacturer / Brand: Monarch, Bremen
Year: 1978 ??

Category: Broadcast Receiver - or past WW2 Tuner
Semiconductors (the count is only for transistors) Semiconductors present.
Main principle Super-Heterodyne (Super in general)
Wave bands Broadcast (BC) and FM or UHF.
Power type and voltage Alternating Current supply (AC) / 220-240 Volt
Loudspeaker - This model requires external speaker(s).
Power out
Model: Stereo Receiver 5500 - Monarch, Bremen
Material Wooden case
Shape Tablemodel, low profile (big size).
  • DIN Eingänge, Tape Copy Funktion, Tuning & Signal Anzeige, Speakers A+B, Bass & Höhen Regler, möglicherweise nicht die vollständige Typenbezeichnung!

ReVox Studio 4 mk2, 198?, made in Germany

Link: revoxsammler.ch

Country: Germany
Manufacturer / Brand: Studer GmbH, Willi (ReVox); Löffingen Brand ReVox (brand)
Year: 1985 ?

Range of transmission:
40 Hz -22 kHz
Load rating: 80w
Music load rating: 100 w
Rated impedance: 4 Ohms
Recommended amplifier output: 20- 100 Watts
Distortion factor (k3 max) in transmission range (related to 91 dB at 2m distance equalling an output of 6.8 Watts): 0.3%
Pratical operating output for 91 dB at 1 m: 3W
Loudspeaker components parts:
Magnetic flux density:

  • Low frequency in Tesla (Gauss) 0.85 (8500)
  • Medium frequency in Tesla (Gauss) 1.35 (13500)
  • Hihg frequency in Tesla (Gauss) 1.65 (16500)
Magnetic flux in μWb:
  • Low frequency 420
  • Medium frequency 660
  • High frequency: 230 mm
Speaker Dimensions:
  • Low frequency: 230 mm
  • Collar medium frequency: 38 mm
  • Collar high frequency: 19 mm
Transmission frequency: 800 Hz / 5 kHz
Connection: Sliding binders
Weight: 11 kg / pcs.
Dimensions (HxWxD): 462х305х298 mm
Casing design: Textured sheeting, ash black
Miscellaneous: Automatic high frequency protection circuit, Removable front cover.

Yamaha CS-15 37-Key Monophonic / Duophonic Analog Synthesizer, 1979-1982, made in Japan

Link: synthtopia | vintagesynth | Service Manual

This synth really has its own sound. The CS-15's got style. Built like a tank with a lot of nice knobs and best of all, not one but two of those funny sounding multimode filters. It's actually a duophonic / bitimbral synth but you have to connect it to CV (Hz/V like Korg not V/Oct) to get the extra voice. Each of the two VCOs has its own CV/Gate control.

The best things about it are the flexibility of the VCFs and the routings to the filters and envelopes. You can rout VCO 1 to both VCFs and the VCFs to any of the envelopes positive or negative voltage. The VCFs are 12 dB/Oct and are switchable between low, band or high-pass. They are the key to the nice sound of the Yamaha CS family. Other nice features are noise, external-in for processing other sounds, LFO with Sample & Hold for those bubbling sounds and an individual auto-bend for the VCOs.

The CS-15 is great for strange blips, bass and tiny highpass sounds. The ADSRs aren't as fast as the CS-10 but they are ok. A nice feature is the 'brilliance' slider that can control either or both VCFs.

Sony SQA-200 Stereo Quadraphonic Decoder Amplifier, [serial #53555] 1972-1974, made in Japan

Link: radiomuseum | youtube | hifiengine


Welcome to the world of the quadraphonic four-channel stereo sound.

Stereo Quadraphonic sound adds depth to stereophonic sound because the sound is reproduced over four widely separated speakers, giving an impression of surround sound.

With SQ sound, a symphony orchestra is not only displayed over the two front speakers as in conventional stereo, but its reverberant sounds are provided over back speakers, bringing actual concert hall presence to the listener.

Also with this SQ system individual performers can be recorded to create new musical effects with the listener being completely enveloped by 360° sound; or, a performer can freely move around as in theatre or show recordings left, right, front or back.

Quadraphonic sound reproduction is now possible with your present high fidelity music system by using the Sony decoder amplifier Model SQA-200 (which has an amplifier and also two output connectors for the back speakers) and two additional back speakers.

When playing 4-channel SQ records, the special decoder in the SQA-200 provides reproduction of the original program on four separate channels.

With the SQA-200 you can play SQ records on a conventional stereophonic player, and record and play back the SQ sound on a two channel tape recorder.

Conventional stereophonic programs become more dynamic with outstanding front channel separation and back channel separation, and accurate positioning of each musical instrument.

Оконечный усилитель собран на: 4 x Sony D291.

Year: 1973?
Category: Audio amplifier or mixer
Semiconductors (the count is only for transistors) 42:
Main principle: audio amplification
Wave bends - without
Power type and voltage (AC) / 110; 127; 220; 240 volts
Speaker: this model requires external speaker(s).
Output power 16 W (max 30 W)
Model: SQ decoder/amplifier SQ-200 - Sony Corporation; Tokyo
Material: wooden casing
Shape: bookshelf
Dimensions: (WHD) 312 x 73 x 280 mm / 12.3 x 2.9 x 11 inches
Sony SQ-decoder/amplifier SQ-200 is a combined stereo quadrophonic sound decoder and amplifier for two real speakers as an addition to an existing stereo system for four-channel reproduction. When playing 4-channel SQ records, the special decoder in the SQ-200 offers reproduction of the original program on four separate channels. 

Net weight: (2.2 lb = 1 kg) 3.650 kg / 8 lb 0.6 oz (8.04 lb)

instruction/owners manual
1972 service manual (USA/AEP)
1973 service manual (USA/AEP/CAN/UK)