Telefunken 204-E (c. 1966–1969)
A quarter-track stereo deck that stood on its edge and threw sound at the walls.
Overview
The fact sheet for this one is empty - no research was ever supplied - so everything below comes from the period documents the archive did manage to pull: a full manufacturer's specification and bench review, plus dealer listings from 1968 and 1969. The 204-E was a quarter-track stereo tape recorder with self-contained power amplifiers and side-facing speakers, and it was designed to be run standing on its end. Studio Sound (October 1967, p.34) noted that when placed near the corner of a room, so the output from the vertical elliptical speakers reflects off the walls, the layout produced a stereo image that was surprisingly solid. Turn it flat for close-up stereo or mono listening and it behaves more conventionally.
The manufacturer's spec, as printed in the same review, lists tape speeds of 7½ and 3¾ ips, a frequency range of 40 Hz–18 kHz at the higher speed and 40 Hz–15 kHz at the lower, wow and flutter of ±0.2% and ±0.3% respectively, and a signal-to-noise ratio of 50 dB. Bias frequency was 85 kHz. Inputs were a microphone input at 0.15 mV into 2K, a radio input at the same 0.15 mV into 2K, and a gram input at 150 mV into 2.2M. Outputs were radio at 1.5 V into 8K and external speakers at 6 W into 10 ohms. The cabinet measured 18½ × 13½ × 8½ inches and weighed 32 lb. The UK price at review was £111 6s, distributed by AEG (Great Britain) Ltd.
The bench work found more than the paper numbers did. Overload recording tests at 500 Hz showed a level 14 dB above test-tape level could be recorded with no more than 5% third-harmonic distortion. Combined with erased tape noise, that gave an unweighted signal-to-noise ratio of 54 dB, better than the 50 dB the manufacturer claimed. Continuous sweeps from 40 Hz to 15 kHz came back free of the bumps and dips caused by head contour effects in the low end, with only a 1 dB spread between the extreme high-frequency responses of the top and bottom tracks.
The acoustic side is where the 204-E shows its compromises. Studio Sound (October 1967, p.34) measured the on-axis response of one internal speaker and found cabinet resonance between 250 and 500 Hz, with the high end falling gently as frequency rose - even on axis, where it should be strongest. The tone controls only cut treble further, so combined with the NAB playback response there was a definite shortage of high-frequency energy on every pre-recorded stereo tape tried. The reviewer's overall impression was still favorable: clean sound, smooth and solid stereo, and transistor circuits that gave an almost complete absence of hum or background noise. A quiet transistor front end in 1967 was not a given.
The control layout is unconventional. All the sockets sit on the front (top) deck panel. The left and right microphone inputs are just below the multi-function selector switch on the head cover, and the rest of the sockets run vertically to the right of the take-up spool. The 7½/3¾ speed lever flips over like an oversized toggle switch between the spools. Tape motion controls - a stop bar plus wind left, wind right, start, and record press tabs - sit to the left, with the pause control to the right of the heads next to the tape counter, and the two vertical VU meters beyond that. Record-level controls are directly below the meters. Slide switches change between microphone and radio inputs, a press switch handles mains power, and playback level controls are to the left beneath the press tabs. The function switch on the head cover offered stereo, track transfer from 2 to 1, track 1 mono, track 2 mono, track transfer from 1 to 2, and parallel playback of tracks 1 and 2.
Pricing moved around a lot in the UK channel. Studio Sound (January 1969, p.34) ran a dealer advertisement listing the 204-E at a cash price of £136 12s 5d against twelve monthly payments of £8 10s. By April 1969 the same magazine (p.26) showed a list of £136 reduced to 99 guineas. Earlier, in June 1968 (p.22), a dealer was advertising the 204E at a list of 106 guineas against a sale price of 86 guineas - a £20 saving - while an April 1968 offer (p.34) pitched it as a "special save £21" at 86 guineas from a list of 106. In March 1968 (p.22) it was 86 guineas with a £22 12s deposit and twelve payments of £5 12s 10d. Original-price comparisons for the 204-E mean little without knowing which month and which dealer.
There was also a later variant. A Studio Sound advertisement (August 1969, p.34) announced the Model 204TS Stereo as "a greatly improved version of Model 204E" listed at £139 2s 9d, all-transistor, three speeds, two 6 W amplifiers, described as an all-stereo machine with advanced facilities. The archive has nothing further on the 204TS, and the fact sheet documents no production years for either model, so the c. 1966-1969 span in the heading reflects the period covered by surviving documentation rather than a confirmed manufacturing run.
The 204-E is a 32 lb quarter-track machine with a quiet transistor amplifier section, a transport that measured clean across the band, and a speaker arrangement that only works if it sits in a corner and lets the walls do some of the work. The cabinet resonance and the rolled-off top end are documented on the bench. The archive has no parts or service documentation.
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