SoundScriber 200 B. Portable battery recorder - the phonograph. Made
in the USA, probably in 1958. Recording is made on
plastic floppy disks with diameter 3 and 4 inches by
mechanical cutting grooves. Dimensions recorder 255 x
160 x 75 mm. Weight 2,4 kg.
Dining 6 v, the four-cell battery D (UM-1), or from an
external power source. Circuit collected on four
transistors type 2N508, and two transformers. Despite
the small number of transistors, electronics board does
not look very simple, there are a lot of capacitors and
resistors. Trails electronics board gilt.Mechanics of a rather complicated, is made
very carefully and technologically. Everything to the
smallest details made very high quality, and still works
correctly. Also produced similar recorders
"SoundScriber 200" with the
circuit on two radio tubes. Electronics course was defective, but
otherwise not to be expected, since in the scheme of
many electrolytic capacitors, and for 50 years they have
dried up, and lost efficiency. Such failure is easily
repaired, but there was another, more serious flaw. Was
Spoiled recording needle. It consists of a holder with
fixed therein cutting the crystal. That this crystal is
absent. At first I assumed that the recorder can not be
repaired because the repair would require replacement of
the recording head completely, that is very problematic.
But decided to try it, and stuck to the holder of a
shortened gramophone needle. The experiment was a
success, and after replacement of dry electrolytic
capacitors, the recorder was in good order. Record
obtained good quality. Dynamic microphone
with remote activation switch is connected to a recorder
via a three wire cable in the screen hard, without
connector. Rubber sheath cable from time cracked and
crumbling in many places, but the wires kept working.
The microphone also combines the function of the
speaker. On the front panel are two slots "jack" in
diameter 3.5 mm and 6 mm for connection of a pedal of
remote control and headphones are located. On the left, next to the tonearm is playing volume and recording level, combined
with the power switch. Right next to the tonearm record
button is located in the recording. When the button is
pressed, the arm is raised. When the button is pressed,
the arm is lowered, and the recording needle is pressed
to the plastic disc. Nearby is also a lever that, when
clicked on that during the recording needle moves to
"step" forward. This disk is formed "gap" separating the
desired location recording, as on vinyl plate between
the tracks. Over the tonearm playback and recording
tonearm has a ruler to find the right place and to
determine the balance of free disk space.
photo on the left recording mode, the photo on the right
- the play mode.
Photos can be enlarged
Externally, the apparatus looks lovely,
has comfortable leather handle for carrying.
Battery compartment is
combined with a storage compartment for microphones, and
separated from it by a removable partition. On the right
is seen jack (Jack 3,5 mm) for
connecting an external power supply.
A microphone with a switch for remote
activation is stored in the soft tissue cover.
Internal microphone and the original
batteries that came with the recorder.
Photos of the internal structure of the
Photos of the internal
structure of the recorder and electronics board.
Transistors are inserted into sockets
The photo on the left pickup with a
needle in the photo on the right - the arm entries. In
the larger picture shows that the recording needle is
not cutting the crystal.
Photographs taken during the disassembly
of preventive heads.