Advent VideoBeam 1000A (1975)
Three-tube CRT projection TV system with 7-foot diagonal output at 100" focal distance, designed by Henry Kloss.
Overview
The Advent VideoBeam 1000A is a rear-projection CRT television system manufactured by Advent Corporation in Cambridge, Massachusetts, and released in 1975. It is a later version of the Advent VideoBeam 1000, following it by only about a year. Designed by audio pioneer Henry Kloss, the system projects both picture and sound from the base unit toward a curved matte metallic screen, which reflects the image back to the viewer. It was marketed as a plug-and-play system with few adjustments for easier installation. The unit includes an internal permanent magnet dynamic loudspeaker delivering 5 watts of audio output, with frequency response from 80 to 12,000 Hz.
Specifications
| Screen Size | 51.5" x 68.5" (7-foot diagonal) |
| Projection Type | NTSC color TV projector at 100" distance |
| Focal Distance | Fixed at 100" |
| Number of Tubes | 3 (RGB) |
| Power Output | 5 W |
| Audio Frequency Response | 80 - 12,000 Hz |
| Loudspeaker | Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) |
| Power Type and Voltage | Alternating Current supply (AC) / 120 Volt |
| Power Consumption | 180 W |
| Projector Weight | 140 lbs |
| Screen Weight | 68 lbs |
| Wave Bands | VHF incl. FM and/or UHF |
| Tuner | US FCC standard single knob VHF/UHF tuner with AFC |
| Remote Control | Optional, wired or wireless ("big boxy remote") |
| External Input | Yes, with "Normal/External" switch next to volume control |
| Material | Various materials |
| Shape | Console |
Design
The Advent VideoBeam 1000A uses three cathode ray tubes (red, green, blue) with rear-facing 3" phosphor screens and collimating mirrors to project color images. The system includes protective circuitry that blanks the tubes in case of vertical or horizontal deflection failure or anode over-voltage. It features a contrast control and an external input connector. The unit occasionally emits a loud static discharge "ZAP" in low humidity. Both picture and sound originate from the projector base and reflect off a dedicated curved screen toward the viewer.
Context
The Advent VideoBeam 1000A was introduced in the 1970s by Advent Corporation as a successor to the VideoBeam 1000. It is described as "the grand daddy of all projection screen TVs," reflecting its pioneering role in home theater technology. Advent Corporation produced 18 models in total.
Market
The Advent VideoBeam 1000A originally sold for around $3000. There is a steadily growing nostalgic interest in these units, and they are expected to continue appreciating in value. Common issues include failure of vertical or horizontal deflection circuits and anode over-voltage. RGB video output transistors have required replacement over time. Parts such as chassis, unused RGB tubes, and new boards are reported to be available from users.
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