Metal Case
=
YD Model
600 ohm inputs / outputs = YD Model
No Tape Counter
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Pre-Series 2
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SERIES 2
1955-57
The round Black or Cream control knob, definitely signifies the
machine is prior to Series 4(1959), when a newer ergonomic design
was introduced.
Prior to the Series 2 there was the Model "D", this was a
domestic version of the G100 and styled the same, except the
G100 metal cabinet was replaced by a polished wooden one.
The half round meter design was discontinued after the Series 2.
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SERIES 3
1957-59
The Series 3's introduced the square meter with the deep bezel,
these were originally either Black or Cream. Tape Guides were
introduced on late Series 2 decks but were more prevalent on the
3 series.
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SERIES
4
MONO
1959-62
The new look ergonomic control knob made its first appearance
on the Series 4, together with the hinged head cover. The pause control was on the head cover as standard and operated by pressing the button on the front face of the cover, or by connecting a camera release cable which allowed what was laughing called remote operation.
The colour scheme was standardised to two tone Grey from the Series 4 onwards ,and it was during this time that the "BUILT LIKE A BATTLESHIP" saying was coined.
Late in the run of this model, and before the advent of the Series 5, the model 4 amplifier panel was changed to the yet to come Series 5 style, and the tape deck although incorporating the Series 5 small diameter capstan and better performance, although the run lever remained as the original Series 4 without the lockable pause control.
"The colour scheme for Ferrograph models was standardised in 1959, with the following announcement".
= SERIES 4
STEREO
420
1960-62
Ganged Mic /Line
Controls for Mixing.
The 420 series saw the introduction of mixing line / microphone inputs.
This machine effectively replaced the 808 stereo recorder.
This new style continued through to the Series 6.
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SERIES 5
1962-65
With the introduction of the Series 5, the metering from the Series420 was adopted, and also the method and means of changing tape speed.
Now a separate amplifier panel control switched equalisation separately from the speed change knob.
The new style run lever also incorporated for the first time a lockable pause control.
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SERIES
6
Mono/Stereo
1966-68
Some slight changes had been made since the Series 5, notably the angled tape counter, and the addition of another speed.
This turned out to be the last of a distinguished line of Tape Recorders that had been manufactured since 1948, it was soon to be replaced by the all singing, all dancing Series 7 in 1968