Videoton EA 6383 S Stereo Amplifier, 1983-1985, made in Hungary


- >  When you touch your buttons, an electronics mutes the inputs of the power amplifiers, so there is no noise when you switch to the speakers!!! The mute function often remains ineffective due to the oxidized spring contact string built into the buttons. This also applies to the mains switch!!! < - 

Оконечный усилитель собран на: 2 x Motorola BD809 & Motorola BD810

Country:  Hungary
Manufacturer / Brand:  Videoton; Székesfehérvár
Brand VTTV
Year: 1982–1985
Category: Audio Amplifier or -mixer
Semiconductors (the count is only for transistors) 36:
Main principle Audio-Amplification
Wave bands - without
Details
Power type and voltage Alternating Current supply (AC) / 230 Volt
Loudspeaker - This model requires external speaker(s).
Power out 100 W (unknown quality)
Model: Stereo Amplifier EA6383S - Videoton; Székesfehérvár
Material Metal case
Shape Book-shelf unit.
Dimensions (WHD) 440 x 115 x 240 mm / 17.3 x 4.5 x 9.4 inch
Notes 3 IC, 20-20000 Hz.


Features

Hi-Fi stereo amplifier with 8Ω output. Semiconductors: 3 ICs, 36 transistors and 21 diodes. Tuner, two magnets and a magnetic turntable can be connected to it. There is a headphone jack on the front panel. Balan, high and bass control and volume potentiometer are located on the front panel. The push buttons can be used to adjust physiological volume, mono-stereo switch, high and low-cut filter. Below the input selector buttons. The display is a two-line VFD panel. Next to it is the "Mute" button, which reduces this volume by 10 dB.
Frequency response: 10 to 40,000 Hz. Bandwidth: 20 to 20,000 Hz. Signal to Noise: From tape and tuner inputs: ≥58 dB; turntable input: ≥50 dB. Harmonic distortion: 0.06%. Intermodulation distortion: 0.2%. Transduction attenuation: 1kHz for tuner and tuner inputs: ≥50 dB; turntable input: ≥40 dB. 10 kHz for tuner and tuner inputs: 40 dB; turntable input: 30 dB. Output power: sinusoidal: 2x30 W; music: 2x50 W. Power consumption: max. 160 W.

Other

Donor: Tibor Schroder.
Videoton's second generation (RT-402) high-fidelity Hi-Fi tower amplifier. Additional features of the tower include Videoton RT 6303 S tuner, Akai AP-Q310 / C turntable, Akai CS-F210 tape recorder, VT DC 2550 speaker and SA7 stand.
Its predecessor is the VT EA 6380 S, which has changed a lot. Interestingly, when you touch the buttons, the electronics mute the amplifier so there is no noise or bump on the loudspeakers when switching on. Its amplifier includes BD809-BD810 high-purity transistors, but the same can be said of the other semiconductors used in the final phase. Despite its active use, the last bolt is in its original, flawless and scratch-free state, making this amplifier even more special.



Grundig V 7200 hight Fidelity [black face], 1984, Made in Portugal


Link: hifiengine | radiomuseum

В качестве силовых транзисторов использованы те же самые что и в Telefunken TA-350 попарно GDV64A (BDV64A в Telefunken) и GDV65A (BDV65A в Telefunken) но уже с маркировкой Philips.

Country:  Germany
Manufacturer / Brand: Grundig (Radio-Vertrieb, RVF, Radiowerke)
alternative name Grundig Portugal || Grundig USA / Lextronix
Year: 1984 ?  Type: Audio Amplifier or -mixer
Semiconductors (the count is only for transistors) 37:
Principle Audio-Amplification
Wave bands - without
Details
Power type and voltage Alternating Current supply (AC) / 220 Volt
Loudspeaker Power out 100 W (unknown quality)
Model: Stereoverstärker V 7200 - Grundig Radio-Vertrieb, RVF,
Material Metal case
Shape Book-shelf unit.
Dimensions (WHD) 450 x 120 x 360 inch / 11430 x 3048 x 9144 mm
Notes 2 IC; Stereoverstärker V 7200 Musikleistung 2 x 50 Watt.
Net weight (2.2 lb = 1 kg) 8 kg / 17 lb 9.9 oz (17.621 lb)


Downloads: service manual




TC Electronic G-Major 2

Link: tcelectronic | Owner's Manual [PDF]
  • Univibe
  • Tri-Chorus
  • Through-Zero Flanger
  • Retuned TC Electronic reverbs
  • New filter/wah block ported 1:1 from G-System
  • Reverse Delay
  • Intelligent pitch shifting
  • Modulated delays
  • PC/Mac editor
  • Relay switching



Canton GL-260, 1981, made in Germany


Link: hifi-wiki | audiokarma

GeneralManufacturer: Canton
Model: GL 260
Years of construction: 1981
Made in Germany
Color: Black, White, Bronze Brown
Dimensions: 180 x 265 x 120 mm
Weight: 3.4 kg
Original price approx .: 460, - DM / pair

Technical specifications

  • Type: 2-way closed, compact speaker
- Chassis:Woofer: 16 cm
- Tweeter: 2 cm dome

  • Resilience: 45/70 W (nominal / max)
  • efficiency:
  • Frequency response: 
  • Frequency response: 42 to 30,000 Hz
  • Transition regions: 1700 Hz
  • Impedance: 4 ohms

Special Features

  • removable front grille



Today I pulled the woofer on one and took a look around in them. The big surprise is that the woofer has what looks just like the normal aluminum frame that I'm getting used to seeing on Cantons but actually it's a plastic frame! It looks like it might be some kind of glass reinforced plastic, but plastic nonetheless. The speaker box is also a 2 piece plastic cab with the front baffle being the 2nd piece and is removable, being held on with 6 screws.

The caps are the typical Canton caps made by Wego and don't have any value markings other than 23vac, just part numbers. The part numbers for everything are as follows:

Tweeter = 2746
Woofer = 1368
Cap (tweeter) = 3779
Coil (tweeter) = 2097
Cap (woofer) = 1228
Coil (woofer) = 2862
And 2 resistors, 12 ohms and 150 ohms.

I'm putting a list together of the cap numbers from all the different Canton speakers that I and some friends have and will be writing Canton to ask if they can identify them. I'll post when I get an answer just to put it on record. Wego apparently specializes in producing OEM caps etc made to spec for the end user. And I've already found out that pulling and measuring a cap with an LCR meter doesn't help much because some (most?) of the caps are made to some non standard values, such as what I found in a CT 80. A cap with PN 1615 measured 139.9µF when I pulled it. I found out in a German HiFi forum that that cap has an original value of 120µF. So this is turning into an interesting bit of research. 
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