Grundig 4035W/3D

Grundig 4035W/3D

Produced in 1954/55, the Grundig 4035W/3D substituted the glorious 4040W/3D.
It inherited the great sound created by the huge loudspeaker system and the Class A final stage.

The modern EL84 substituted the EL12 for a more precised and defined sound, if that is even possible. The EL84 is still considered one of the most musical tubes ever produced and it is still used in the High-End amplifiers.

Even in this case the device is equipped with a double output transformer and with an elaborate feedback system that has been designed to linearize the frequency response in the output stage.
The second output transformer is specific for the side loudspeaker so that you will not ever have saturation effects.
It is of course an expensive solution that will be abandoned in later production.
The tone controls are inserted in the feedback circuit so that the distorsioni is further reduced.

The FM converter stage is composed of two separate triodes as in the most prestigious SABAs.
This stage is amplified by an exclusive circuit equipped with an EF89 before continuing in Medium Frequency stage.
This peculiarity reduces the interferences, already very minimum, with the amplitude signal’s width fluctuations.
Tuning is therefore extremely stable.

All these expensive technical solutions create a high level sound quality. The 4035W/3D makes us incredibly satisfied.

Grundig 4035W/3D

Grundig 4040W/3D

1950 - Very high frequency (VHF) is introduced to Germany and places new demands on the industry. Grundig launches the 380 W on the market.
1952 - The first television channel starts up in Germany. After intensive research, Grundig launches the FS 080 onto the market. In the same year the first portable tape recorder Reporter 500 L is created.
1956 - After a lot of radio produced with progrssively high performances was produced the Concert Radio 5080 equipped with an equaliser, which has five controls and a visual display.

Grundig 4040W/3D

1930 - At 22 years old Max Grundig begin a radio repair business.
1939 - The II world War start. Grundig works primarily for the Wehrmacht and repair of telecommunication equipment.
1945 - Immediately after the war, the demand for repair work was very great. Max Grundig built the first two Grundig appliances: the Tubatest tube tester and the Novatest testing device.
1947 - Start the sale of a kit radio, the Heinzelmann. The unit is the basis of success, sold more than 15,000 pieces.

Grundig 4040W/3D

1965 - A new factory is established in Braga, Portugal. The Satellit 205 is one of many appliances in the Satellit series. This product marks the beginning of Grundig production of high-quality global receivers.
1970 - The Audiorama 7000 Hi-fi was produced, it has twelve dynamic speaker systems in one speaker.

1976 - The Reel Tape Recorder TS 1000 is equipped for semi-professional use.
1980 - The slim-line Hi-fi Tuner ST 6000 and the Monolith Hi-fi Dynamic Flat Top Antenna, which has 22 speaker systems, are two particularly popular appliances in the new hi-fi range.
1984 - After severe drop in sales Philips increased its stake in Grundig 31.6 percent and takes over the corporate management.
1997 - Philips pulls out of its involvement with Grundig.
2003 - The company files for bankruptcy.
2008 - Turkey's Koç Holding took full ownership of Grundig Multimedia B.V., the parent company of Grundig Intermedia GmbH in Nuremberg.

Courtesy of: Grundig

MAIN FEATURES

Year of production: 1954/55

Superheterodyne IF 460/10700
10 AM Circuits
11 FM Circuits

Wavebands:
LW, MW, SW, FM

Operating voltage (CA) 
110; 125; 160; 220 Volts

1 Woofer
2 Midrange-Tweeters
1 Electrostatic Tweeter

Dimensions (LHD): 25.8 x 16.8 x 12.4 inch

Net weight: 36 lb 5.5 oz

8 Tubes:
2xEC92, EF89, ECH81,EAF42, EABC80, EL84, EM34

Optional module to receive the TV channels.
Rotating ferrite antenna for AM

Grundig 4035W/3D

 

TONE CONTROL WITH LEVEL INDICATION

The tones control system is very efficient. Above the large tone control knobs there is a band that lights up gradually indicating the emphasis on the band on which it acts.
A detail specific for “extreme” technical radios lovers: the high-tone control knob is linked to two thin ropes. One of them is for the position indicator of the control itself, whereas the other changes the position of the ferrite in the MF transformers modifying the inclination of the transformer’s curve.
By doing so high tones were attenuated/accentuated even before getting to the BF stage. Tone control was usually put into effect with the potentiometer on the tension amplifier stage.

AERIALS

Inside the cabinet there is a dipole for FM reception and a ferrite rotating aerial for AM reception.
Ferrite aerial can be rotated from the outside to achieve a perfect tuning of the device in the AM.
In this picture see the rotation mechanism and the position indicator of the aerial.
The reception sensitivity with internal aerials is very good. This unit was in fact produced in a period when there were not many radio stations and those available fairly apart from each others.
Using an external aerial sensitivity is further increased.

SEPARATE CONTROL TUNING BETWEEN AM AND FM

The tuning system is another gem.
The unit is equipped with mechanisms for keeping separate the AM and FM bands.
The tuning knob is single but a selector switch commutes into cable systems (all in steel) and pulleys separated depending on the band.
The movement is transferred to both mechanisms with a system of pulleys and separated gears.

 

Grundig 4035W/3D - Magic eye

TUNING INDICATOR


The tuning indicator has of course been replaced.

Band Indicators

With this beautiful keyboard type, called "a piano", you can not know out which button was pressed and which band you are listening.
Above each key there is an indicator that changes color when the appropriate key is selected for this reason .

CONTROL PANEL

On the left you can find the volume control (with incorporated loudness) and the ferrite antenna’s rotation control.
The AM scale for short, medium, long an FM waves.
On the lower left side there are the ON/OFF, record player, the long, medium, short and FM waves.
Symmetrically to the AM aerial indicator we find the tuning indicator.

Lastly the tuning knob is supported by a big fly-wheel which creates a pleasant movement.
Below there are the two bass and high control knobs.

Grundig 4035W/3D

 

LOUDSPEAKERS


There are four loudspeakers.
The woofer is huge and extremely efficient.
The radio is equipped with an electrostatic tweeter on both sides for the 3D reproduction.
Remarkable the woofer’s dimensions compared to the valves. Amazing sound!

 

Grundig 4035W/3D - Rear side

REAR SIDE

 

Output for external speakers.
Socket for recorder (tonbandgerat).
Turntable input (Tonabnehmer)
AM and FM aerial inputs and ground socket.

THE RESTORATION WORKS

THE USUAL AMAZING LAST IMAGE

Grundig 4035W/3D

3 thoughts on “Grundig 4035W/3D

  1. Hey there,

    i have the same radio. the grundig 4035. it was used from 1955 till the late 80s and was then stored in a dark room and never used again.
    to the beginning of the 2000s i restored the radio (ac plugin broken) and now it works wonderful again.
    tuning the station with the big whell is not perfect (less resisitance whern turning) but rest ok event the “Magissches Auge” magic green eye.

    1. Hi Steve,
      it’s a great radio. Not well known.
      About the irregular tuning movement in most time is enough to lubricate the linchpin of the variable capacitor.
      Check please also pin 2 of the EL84 almost.
      If you will find around 0 V you can listen your beautiful radio without be worried.
      Giovanni

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