Telefunken 600. Portable Dictating
Machine. Portable recorder (dictating
Made in Germany probably in
the early 60's.
The first known to me
mentions in the press about this model belong to 1962,
but the same voice recorder called Telefunken-Traveller
has been known since 1959. The original design, the distinctive
feature of which is an unusual type of media. In fact,
this tape, but the record is not on reel, but on a
magnetic disk. It is made of flexible plastic, embossed
with a spiral groove width of 0.3 mm, similar to the track vinyl, and
contains 10 minutes of recording. At the working surface
of the disc suffered a magnetic coating. On top of it
brown, like a magnetic tape, and the bottom black.
Externally, the magnetic disk is very similar to
ordinary flexible plate, and has a diameter of 155 mm.
Hole diameter 38 mm. Also on the disc, there are two
small holes for use in models without downholder.
The front panel, switch the power indicator, volume
control and the recording level, and the lever for
moving the head in the right position. Beam displacement
lever marked out a ruler. To move the head, you should click on the lever on
the top - down and move it into position. When you click
the lever to the head is lifted above the disk, and does
not hinder its movement. If you move the lever to the
right, and a little more forward with force, then
released the catch of a magnetic disk, and you can pull
out or insert.
Working part of
the magnetic head has the shape of an oblong protrusion,
which moves along the guide groove in the disc. All the
mechanics are German made accurately and efficiently.
Friendships all made of metal, in connection with the
apparatus rather than a heavy, 2,65 kg (without
microphone) with dimensions of 285 x 200 x 60 mm.
In my collection there is another similar recorder
Assmann TS 10. He was also made in Germany, but much
later, probably in the late 60s or early 70s.
Structurally, they are very similar, but electronics
Assmann TS 10 is much harder.
Photos can be enlarged
In the illustration to the left,
the parameters of the groove of the magnetic
disk Telefunken 600.
The same discs are
used with similar in construction of voice
recorders Traveller and Kurier produced by
Telefunken and AEG, respectively. I
use such a disk with an Assmann TS 10 voice
recorder. The original Assmann TS 10 discs have
a different hole diameter, but the groove
parameters are the same as those of the
Telefunken 600 disks.
Carrying voice recorder is a leather
carrying case with handle and straps for mounting inside
the vehicle and the microphone. Also in the briefcase is
a leather bay charger, and a pocket for documents and
On the right side panel contains connectors for
microphone control, and a telephone adapter. There is
also switch the microphone - phone and power switch. The
rear panel is a connector for the charger.
photo on the left also shows the device with permanent
magnets to quickly erase the information from the disk.
Also included is a pack of replacement paper lines,
which are mounted on special pins. In the photo on the
right see the unlocked lock magnetic disk.
In case a microphone built two switches.
First - inclusion - off. The second has four provisions
- record (red sector), stop (yellow), play (green).
Fourth position is not fixed - the reverse rotation of
the disk (Rewind). Microphone cable has a rectangular slot 8-pin. The
microphone also acts as a speaker.
The main electronics board is located
above the disk. It assembles the recording and playback
amplifier. It is made on 4 transistors (OC602,
OC604 spez) and two transformers. There is also a relay
switching modes. Under the
disk is the generator eraser and bias (on the OC604 spez
transistor), as well as solenoids for switching the
operating modes of the mechanism.
The engine is placed in a cast aluminum
housing, and beside it is the battery pack of 6 v.
The device came to me in good cosmetic condition, but
not the workers. Mechanics was serviceable, but the
record do not succeed. It turned out later proved faulty
steering and power heads. Repair of the amplifier has
been reduced to the replacement of dried electrolyte,
and with block heads all turned out much worse. It is
made in the form of boxes, drenched compound, and has
the dimensions 22 x 9 x 14 mm. On each side there are
contacts windings. Both, and erase, and Universal have
resistance of about 3 ohms. Broken was working part of
the head, made in the form of an elongated protrusion 4
x 0,25 x 1,2 mm. Repair it is not possible, and I had to
make a new unit heads from the universal head to a
recorder Olympus S725. She went up in size, and in her
case also combines the universal and erase head. It only
remained to handle it so that the working part acquired
the necessary form. Doing this will have to manually,
using diamond tools, as this work is very accurate. As a
result, I was able to form a ledge the size of 3.3 x 0.25
x 0.8 mm. Building a new unit heads I have made from textolite.
Unfortunately I do not know how to work the recorder
with the original unit heads, probably better than
homemade. However, I managed to achieve a good quality
recording and playback.
heads of the assembled and disassembled
On a photo on the right in the bottom of
a yellow line to finish the form of a working part of
the block heads what she should be
The design of the universal
Homemade block heads
Charger, calculated on the connection to 110-120 v
Bundled with the device were 3 of the magnetic disk in
an envelope, instruction manual, specification, charger,
and a device with a permanent magnet to quickly erased
would add that in 1962 a similar voice recorder
Telefunken 606 was worth 528 DM.
More details about prices for voice
recorders and accessories can be found below.
Manual and Specification
Telefunken 600 ads in the newspapers.
The first mention of this
recorder in 1962.
Description of a similar Telefunken 606
recorder in the Telefunken catalogs