Grundig HiFi-Box 406, 1972-1975, made in Germany

 

Link: radiomuseum | hifi-wiki

Country Germany
Manufacturer / Brand Grundig (Radio-Vertrieb, RVF, Radiowerke)
Alternative name: Grundig Portugal || Grundig USA / Lextronix
Year 1972–1975 
Category Loudspeaker, headphone or earphone 
Wave bands - without
Power type and voltage No Power needed
Loudspeaker 2 Loudspeakers
Material Wooden case
Model: HiFi-Box 406 - Grundig Radio-Vertrieb, RVF,
Dimensions (WHD) 240 x 580 x 240 mm / 22.8 x 9.4 x 9.4 inch
Notes: 
- Impedance: 4 ohm
- Power handling (continuous / music): 25/40 W
- Frequency response: 40-20000 Hz
- Transition ranges: 2,500 Hz
- 1 Tieftöner 204 mm (marked: Grundig 7019-007 4 Ohm 25W <30Hz)
- 1 Kalottenhochtöner 115x115 mm (marked: Grundig 709728)
- Color: walnut, rosewood
Net weight (2.2 lb = 1 kg) 10.8 kg / 23 lb 12.6 oz (23.789 lb)
Price in first year of sale 248.00 DM
Source of data Handbuch VDRG 1972/1973

Mackie Big Knob revision C01 Studio Command System [monitor switching and level control box letting], 2005, made in China

Link: Manual PDF | soundonsound

Specifications

Frequency Response
Line-level Inputs and Outputs:
- +0, –1 dB, 10 Hz to 50 kHz
- +0, –3 dB, 5 Hz to 100 kHz
RIAA Equalization Deviation (Phono Input): ± 0.5 dB from 20 Hz to 20 kHz

Distortion (THD & IMD)
Line-level Inputs to Line-level Outputs (unity gain): > 0.015%, 20 Hz to 20 kHz @ +4 dBu
RIAA Input, Nominal Gain: > 0.015%, 20 Hz to 20 kHz @ +4 dBu

Noise Floor
(20 kHz Bandwidth, +4 dB level setting, 150Ω source)

Unity Gain, with DAW, 2-Track A, and 2-Track B Assigned: –86 dBu maximum (all outputs)
Monitor A, B, and C Outputs, Studio Output, DAW, 2-Track A, and 2-Track B Outputs: –90 dBu typical
Phono Input (nominal 41.8 dB gain @ 1 kHz, inputs shorted): –71 dBu maximum (all outputs)
Equivalent Input Noise (E.I.N.): 0.89 μV / –119 dBu maximum

Universum Quelle V 794 Best. Nr. 07004 HiFi Stereo Verstärker [Germanium Transistors], 1969-1971, made in Germany

 

Link: radiomuseum

Оконечный собран на: 4 x Ates Al103 Germanium Transistors

Beag AEX-251 Tube Amplifier, 1969, made in Hungary

 

Link: radiomuseum | elektrotanya | Рекомендации по "бережной" переделке | audioportal

Country: Hungary
Manufacturer / Brand: Budapesti Elektroakusztikai Gyár (BEAG), Budapest
Year: 1969 ?
Category: Audio Amplifier or -mixer
Valves / Tubes 8: EF86 EF86 ECC808 ECC808 ECC808 ECH81 EL34 EL34
Main principle Audio-Amplification
Wave bands - without
Details 
Power type and voltage Alternating Current supply (AC) / 220 Volt
Loudspeaker - This model requires external speaker(s).
Power out 70 W (unknown quality)
Radiomuseum Model: AEX-251 - Budapesti Elektroakusztikai Gy
Material Metal case
Shape Tablemodel, with any shape - general.
Dimensions (WHD) 330 x 140 x 400 mm / 13 x 5.5 x 15.7 inch
Net weight (2.2 lb = 1 kg) 12.5 kg / 27 lb 8.5 oz (27.533 lb)
Literature/Schematics (1) Rádiótechnika, 1969.

Radio Shack Realistic model no.: 42-2108 Analog Stereo Reverb System, 1985, made in Korea (China)

 

Link: hifiengine | groupdiy | audiofanzine | audioimprov

Экземпляры маркировались made in Korea & made in China

While scrounging in the closet, I came across this Radio Shack Realistic Stereo Reverb System. It’s kind of cool in a retro ‘80s way. It’s based on an analog bucket brigade chip, which is a bit like dynamic RAM, but the voltage stored in the capacitors of the delay line is analog instead of 1s and 0s. The stored signal is moved one capacitor farther down the delay line with each clock pulse, so the delay time varies with the clock frequency. Fast clock, short delay, slow clock, long delay.


It has a mic input for karaoke or recording to your Realistic cassette tape recorder with reverb. It would normally be hooked to your stereo receiver through the tape in & tape out jacks, so it has pass through jacks to hook the tape deck to.

The side panels are molded plastic with a wood grain print to complement the rest of your equipment. The brushed and anodized front panel.


The delay or echo time ranges from a few milliseconds for a doubling or flanging effect, to 1/10 second, for a distinct echo. Twisting the delay knob while recording creates weird effects, because sound is clocked out of the delay line at a different rate than it went in, causing pitch to drop when delay is increasing, and rise when delay is decreasing. These are also sought after as guitar effects. The mic input distorts and sustains with a guitar, and the delay adds its own goodness and body.

First, Dry. No reverb: mp3

Wet. With Reverb: mp3

Changing Delay Time: mp3

Marantz Model 1515 AM/FM Stereo Receiver, 1978-1980, made in Taiwan (designed in USA)

Link: hifiengine | hifi-wiki | 1515/1515L instruction/owners manual | schematic | service manual | service manual (alt scan) Related Catalogues: We Sound Better | HiFi



Specifications:
Tuning range: FM, MW

FM: 87.5 - 108 MHz
MW: 525 - 1605 kHz
Marantz model 1515L: LW диапазон: 150 – 350 kHz
New price approx.: 898 DM
Power output: 15 watts per channel into 8Ω (stereo)
Frequency response: 20Hz to 20kHz
Total harmonic distortion: 0.08%
Damping factor: 25
Input sensitivity: 2.8mV (MM), 180mV (line)
Signal to noise ratio: 72dB (MM), 80dB (line)
Output: 500mV (line)
Semiconductors: 5 x IC, 29 x transistors, 19 x diodes, 1 x FET
Dimensions: 440 x 137 x 357mm
Weight: 9kg

Specifications справедлива для модели кроме как LW диапазона: Marantz 1515(L) Receiver

Rated output per channel:

DIN 4 ohms (1 kHz): 31 W

FTC 4 ohms (20 Hz - 20 kHz): 18 W

DIN 8 ohms (1 kHz): 26 W

FTC 8 ohms (20 Hz - 20 kHz): 15 W

Total Harmonic distortion at rated output: 0.15%

Damping: 28

Frequency response:

Phono (RIAA): ±1 dB

Aux (±1dB): 18 - 30 Hz/kHz

Main in (± 1 dB): 18 - 30 Hz/kHz

Signal/Noise ratio:

Phono: 72 dB

Aux. Output: 80 dB

Input Sensitivity/Imp:

Phono: 2.8/47 mV/k ohms

Auxiliary: 180/20 mV/k ohms

Separation:

Phono (1 kHz): 35 dB

Aux. (1 kHz): 43 dB

Main in (1 kHz): 55 dB

FM Stage (87.5 - 108 MHz):

Sensitivity: 

DIN Mono (S/N 26 dB 75 ohms): 1 µV

DIN Stereo (S/N 46 dB 75 ohms): 25 µV

IHF Mono: 10.8/1.9 dBf/µV

Selectivity/Adjacent channel 98 MHz ± 300 Hz: 65 dB

Signal/Noise ratio 98 MHz:

Unweighted: 

Mono: 62 dB

Stereo: 55 dB

Weighted: 

Mono: 66 dB

Stereo: 60 dB

MW stage (525 - 1605 kHz):

Sensitivity (26 dB S/N 30% mod. 1 MHz): 30 µV

Selectivity: 20 dB

LW stage (150 - 350 kHz):

Sensitivity (26 dB S/N 30% 250 kHz): 250

Selectivity (250 ± 9 kHz): 24

Width: 440mm

Height: 137mm

Depth: 358mm

Weigh: 9.0kg

Эстрада 101 Блок Ленточной обработки из микшерного пульта | Estrada 101 Tape Reverb / Echo / Delay, 1980, made in USSR

Link:

Юстирован 6

Jolana Saphir Pickups Humbuker (for guitar / bass Jolana Galaxis), 1978-1982, made in Czechoslovakia

Link: muzeum | sovietguitars

варитон  + звукосниматели + регуляторы

Anta Fuzz, 1976, made in Latvia, LSSR

Link: oecc | Anita Fuzz-Wah | tagboardeffects

Педаль среднего перегруза. Включается, и выключается как и все Рижские педали нажатием педали до упора, что не удобно т.к. можно нечайно выключить в самый непододящий момент. Так же это еще и самая маленькая педаль Рижской фабрики, остальные заметно больше в длину.

Фузз на двух кремниевых транзисторах. Регулируется уровень громкости и тембр (по современному гейн) сигнала. Платформа нажимает только на кнопку байпаса.

Dimensions: 190х8х65 mm
Питание: от батарейки 9V "Крона"

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