Fisher 400 (around 1964)
A tube-powered FM stereo receiver from Fisher’s mid-1960s lineup, combining tuner, preamplifier, and power amplifier in one chassis.
Overview
The Fisher 400 is a vacuum tube stereo receiver produced around 1964, integrating an FM multiplex tuner, audio control section, and power amplifier in a single unit. It was designed to deliver high-fidelity sound while making Fisher’s engineering quality accessible to a broader audience. Unlike the flagship FM-1000 and SA-1000 models, the 400 was positioned as a more affordable all-in-one solution, part of a product family that included the 500C. An original receipt from 1964 lists a price of $330, indicating its mid-tier market placement. The unit uses 7868 output tubes in a push-pull configuration, distinguishing it from other Fisher models that used 8-pin tubes.
Specifications
| Type | Tube type control amplifier |
| Output voltage | 2.5mV |
| Input sensitivity | Mic, Tape head: 1.5 mV / Phono: 2.8mV / High level: 200mV |
| Frequency characteristic | 10 Hz to 25 kHz ± 1 dB |
| Configuration | Vacuum Tube: 10 / Diode: 2 pcs |
| External dimensions | Width 384 x Height 122 x Depth 305 mm |
| Weight | 8.2 kg |
| Power requirements | 105–120 volts, 50–60 cps AC, 200 watts at full power output |
| Power output | 25 watts per channel into 8Ω (stereo) |
| Total harmonic distortion | 0.8% |
| Signal to noise ratio | 80dB (line) |
Design
The Fisher 400 uses 7868 tubes in a push-pull configuration for its power output stage, contributing to its 25 watts per channel output. It integrates a sensitive FM multiplex tuner and full audio controls on a single chassis, streamlining the high-fidelity experience. The unit’s design emphasizes serviceability, with documented procedures for dial pointer adjustment and guide rail alignment in the service manual.
Context
Part of Fisher’s mid-1960s receiver family, the 400 was positioned below flagship models like the FM-1000 and SA-1000 but brought Fisher’s reputation for quality to a wider audience. It was grouped with the 500C as a popular tube receiver option during the transition from separate components to integrated systems. A user recalls owning a Fisher 400 in 1966 as part of a system that included a Dual 1019 turntable and Jensen TF4 speakers, highlighting its role in introducing listeners to high-fidelity audio.
Market
Working Fisher 400 receivers have been observed selling locally for $400–$500, with some listings priced as high as $989 for fully functional units. Units are also commonly offered for parts or restoration, and some owners report recurring issues such as repeated failure of one power tube. Rebuilds and servicing are documented among tube audio enthusiasts, indicating ongoing interest in maintaining these receivers.
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