BEO.ZONE

Beovision 3000SJ / 3000KJ

BeoVision

Production: 08/1968 - 1970

Designer: Henning Moldenhawer

Beovision 3000 had a 25” screen and was housed in its own cabinet:

” Beovision 3000 Colour SJ is a colour television receiver built like a deluxe PAL receiver with a delay module for the PAL system. The receiver is compatible, which means it is capable of receiving either black-and-white or colour programmes, and the transition is automatic so that you avoid manual operation of buttons or similar controls “

In the summer of 1963, Bang & Olufsen began the development of the first colour television, with engineer Bent Moller Pedersen and an apprentice. Testing the new receivers was still a problem, because there were not many places where colour test cards could be received. It came as a relief to the technicians when, in 1966, Hamburg began to broadcast test cards.

A Bang & Olufsen colour television laboratory with three technicians was set up for a week at a pub 25 km north of Hamburg! In 1967, Bang & Olufsen began producing colour televisions - not without a certain cautious scepticism. Director Jens Christian Sonderup wrote to retailers in the summer of 1967: “At the moment, no one can say with any degree of certainty how sales of colour televisions will develop. Let us be clear about one thing, though: colour television will not be the bread and butter of the sector during the coming season… We must all hope and believe that the radio sector will prove to be a match for colour TV. in B&O circles, let us as usual err on the side of healthy development.” Weighing in at 52 kg, the Beovision 3000 Colour S.1 was an investment for the company in a market that was still feeling its way between different international standards.

The introduction of colour television brought with it some new concepts that were unknown in the days of black-and white reception: colour saturation and colour tone. The picture tube was now 63cm, but it could not be manufactured with sufficient perfection and accuracy for the three electron guns in the picture tube to line up properly on the interior of the picture tube. It was therefore necessary to make some manual adjustments (convergence adjustments) in production as well as in subsequent servicing. The set had to be adjusted at regular intervals. That had also been taken into consideration in this unit. Chief Engineer Knud Hoist and Engineer Bent Moller Pedersen wrote the following instructions with the service technicians (rather playfully) in mind: “Here is B&O’s unconventional solution on the deployment of the convergence buttons. Remove the small panel at the front of the set by lifting it with a coin. The flap can then be pushed far back enough to allow easy access to the convergence buttons while, at the same time, their effect can be seen by looking at the screen. One reason why we have done this is in order not to impose a requirement for future colour TV technicians to be born with extra-long arms!

Despite the director’s cautious scepticism, Chief Engineer Knud Hoist had no doubt that colour television was the way ahead. Speaking in a radio lecture, he said: “If we don’t open the front door to colour television by introducing a Danish colour TV, it will come in by the back door as foreign broadcasts over our borders. Continuing to exclude colour television for much longer from parts of the country that are not covered by Germany will create such a great demand backlog that both the manufacturing sector and the retail sector will both find it difficult to cope when it is finally released. It would be much more desirable to accept what is otherwise an inevitable, slow penetration of colour television into Denmark - and to act accordingly.”

Beolink Magazine: ‘The First 50 Years of Television’ © Bang & Olufsen a/s 2002

The Beovision 3000 was subsequently replaced by the Beovision 3200.

Beovision 3000SJ / 3000KJ technical specifications

Tuning: 
VHF and UHF Push-button tuner (6 push-buttons) All push-buttons could be set for any desired channel on VHF (bands I and III, channels 2-11) of UHF (channels 21 - 70) 
Knobs Volume control with push push mains on-off switch. Bass, treble, brightness, contrast, colour saturation and tint controls located in drawers, contrast knob automatically controlled monochrome and colour signal. Tint control was mechanically indexed in normal position. Vertical hold on back of set 
Push buttons Colour switch (on back of set) 
Sound 
Power output: 3.5 W at 10 % distortion 
Distortion: 1 % at 3 W 
Tone control ranges: bass +/- 12 dB at 100 Hz; treble +/- 12 dB at 10 kHz 
Sound detector: Ratio detector 
Sound intermediate-frequency: 5.5 MHz, 2 stages 

Picture 
Picture tube 25-in. shadow mask tube, Type A 53 - 11 X 
Video intermediate-frequency 38,9 MHz - 3 stages plus additional output stage for chroma 
Chroma (Colour) intermediate-frequency 4,43 MHz - 3 stages. 30 dB AGC control range 
PAL-delay line Type DL 1 64 microseconds 
Luminosity delay-line (Y-delay) 0,75µ sec Reference oscillator Crystal controlled 
Picture tube control Colour difference method (output for brightness signal R - Y, B - Y and G - Y) 
Synchronization Automatic line hold 
Automatic reference oscillator synchronization 
Automatic PAL synchronization 
AGC Keyed cideo IF control range: 50 dB 
Tuner control range: Approx 30 dB with delay 
Chroma control range: 30 dB 
Special feature Automatic colour-section cut-out when receiver is tuned to monochrome picture 
Valves and semiconductors 
Valves 14 + picture tube 
Transistors 64 off. 
Diodes 61 off 

Dimensions and weight: W x H x D 76 x 87.5 x 57.5cm / weight 73 kg 
Power supply: voltage 200 - 220 - 240 V AC 
Frequency 50 Hz 
Power consumption Approx 330 W 
Connections: Inputs VHF aerial, 75 ohms 
UHF aerial, 75 ohms 
Outputs: extensions speaker, 3 - 5 ohms (switching feature provided in jack)