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Sound Rating: 6 / 10 # Owners: 1
Relaibility Rating: 6 / 10 Views: 169

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Technical Details

Brand: Ferrograph

Model:420

Category:Super High Fidelity (Reserved for top-end recorders)

Application:Consumer

Electronic:Tube

Country of Manufacture:United Kingdom

Release dates:1961 - 1964

Tracks:1/2 Rec/PB

Speeds: 3 3/4, 7 1/2

Max Reel Size("): 7"

Number of heads: 3

Head Composition: Permalloy

Head Configuration: Stereo

# Motors: 3

Auto Reverse?:No

Voltage(s): 220-240v

Frequency Response:(all 3 dB): 7½ ips: 40Hz -15kHz

Wow and Flutter:less than 0.2 % at  7½  ips

Signal-to-Noise Ratio:52 db unweighted including hum

Sound quality rating:6 / 10

Long-term reliability rating: 6 / 10

Additional Details

Description

First released late in 1961, the Series 420 consisted of half-track (422) and four-track (424) stereo tape decks utilizing the newer Series 5 transport. The model was a bridge between the older Series 4 and the new Series 5 machines and featured separate record and playback heads. This allowed A/B comparison, echo and recording on one channel whilst playing back on the other. The two operating speeds were 7½ ips and 3¾ ips and a newer, smaller VU meter was fitted.

Additional Info

Speed stability: better than 0.5% / Bias frequency: approx. 68 KHz / Rewind speed: less than 1 minute for 1200ft tape (either direction) / Input levels for full-depth recording: Input 1: min 2mV RMS at 1 Mohm impedance Input 2: min 350mV RMS at 0.5 Mohm impedance / Outputs: 1.0 V RMS impedance 5Kohms / Dimensions (with lid): 18½ ” x 17½” x 9¾ high (470 x 444.5 x 247.5 mm) / Weight: 48 lbs 21.8 kg) / half or quarter-track mono

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