Videocorder - Video Tape Recorder CV-2000

CV-2000 was one of the world's first home video tape recorders (VTR), introduced by Sony in August 1965. The 'CV' in the model name stood for 'Consumer Video' (消費者向けビデオ, shōhishamuke bideo). This was Sony's domestic format throughout the 1960s. It was the first fully transistorized VCR. [...]

It used 1⁄2-inch-wide (13 mm) video tape in a reel-to-reel format, meaning the tape had to be manually threaded around the helical scan video head drum. [...] It recorded television programs in black and white using the skip field process, which produced a maximum 200-lines resolution. The tape moved at a speed of 7.5 inches per second.

Two different reels were marketed: A reel of video tape listed for about US$22—equivalent to $225 in 2025—had 30-minute playtime, and video-tape reel listed for about US$40 could hold one hour of video. Although CV-2000 was aimed at the home market, it was mainly used in business and educational institutions. [...]

One of its shortcomings as a format was the omission of the ability to adjust tracking, which made interchangeability of tapes between different machines almost impossible. Sony's later AV series machines included this feature. The CV video recorders fell into disuse with the arrival of the EIAJ type 1 standard that was used by many companies, including Sony with their AV series machines.

This video recorder is from before the development of multichannel rotary air-gap transformers, which were commonly used for the spinning heads of VHS recorders, to pass analog video signals across the gap from the spinning upper half to the stationary lower half of the head assembly. This recorder instead uses an earlier slip-ring and brush contact system for the spinning heads, with two sets of brushes to increase signal reliability. However it can still experience video signal quality problems if the metal of the brushes or rings become oxidized / corroded, or coated with dust.

[source: en.wikipedia.org/wiki/CV-2000]

Here you find 4210 models, 4069 with images and 1050 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Sony Corporation; Tokyo