Minifon Attache (1960 - 1967).
The latest model series portable recorders Minifon
company "Protona GmbH"; Hamburg, and after 1962 - "Telefunken",
Germany. At the same time (1961 - 1967) produced similar
in design model Minifon Hi-Fi with better wiring. It is known thatin 1961
Minifon Attachewas worth$249.50.
After 1962, inthe United
States on the label in the box between minifon &
attache could be placed logo"ITT".
Photos can be enlarged
As an accessory to recorders made Minifon
desktop speakers with an amplifier, combining the
functions as a microphone and transmitter for
non-contact recording from the telephone. For more
details about their designs on the pages can be MinifonAttache-Speaker and
Unlike previous models, to write to the
wire, the Attache uses a compact cassette tape standard
width of 1/4 inches. The model presented in 1959, and
began producing in 1960, and still continued to produce
the latest version of the wire, Minifon Protona Special.
In 1962, "Protona GmbH" became part of the company "Telefunken",
and before 1967 Attache released under the name "ITT".
On the complexity of design Minifon Attache surpasses
all previous models Minifon, and all existing at that
time recorders in the world. This is a true marvel of
engineering, and production technology of the time. An
amazing machine, and after the repair works just fine.
DVR Dimensions 177 x 102 x 42 mm. Weight without
batteries 800 g, food 12 v, a special battery, which has
no modern analogues. The original tape has
dimensions of 110 x 78 x 11.5 mm and weighs 50 grams.
Produced cassettes, calculated at 1 hour (2 x 30
minutes), ½ hours (2 x 15 minutes) and 12 (2 x 6)
minutes of recording time.
The recorder has, rewind to the two sides, switch-level
power indicator, volume control
and level of recording, tape counter with the
possibility of nullification, and hitchhiking with
indication of actuation. Hitchhiking is an original
design. To properly install the tape on the deck there
are two guide pin, which are also contacts hitchhiking.
Tape at the beginning
and end of a metallized coating, which closes the
contacts, and hitchhiking trips. It is lit red light located in
the window switch indicator. Pinch roller, capstan, universal
and erase head, covered with decorative covers.
Near-date transport battery terminal cover in favor of
the lever that will lead to a permanent magnet tape.
With its help. You can quickly erase the tape (both
tracks simultaneously) during the fast.
The recorder is switched off when the button "Stop" is
pressed to commit. Rewind activated when you press the
button "Rewind". Reproduction is included if you press
and release the button "Listen". This button does not
commit, and when you press it removed all the buttons
lock. That is, the play is, when not pressed the no
button. Hold the button "Listen" to the depressed
condition includes fast forward. Clicking "Record" to
commit includes a recording mode. Scheme collected by 9
transistors. 5 transistors used in a universal
amplifier, 2 in the stabilizer motor speed, one in a
voltage regulator amplifier, and another as a key
management. The amplifier gives a fairly sound quality,
excellent sensitivity when recording, and a very loud
sound in the headphones. The bandwidth of frequencies,
150 - 6 000 Hz. The apparatus consists of a cast body,
and inserted into his deck, which placed all the
mechanics and electronics. The board of the amplifier is
connected to the electronics deck with
10-pin connector and fastened to it with two
The engine is connected to a
cylindrical flywheel with a rubber belt, and the
flywheel rotates rubberized roller, whose axis is
capstan. Modes of winding work with three rubber
rollers. It originally implemented preroll host reel
table. With the engine as it may not yet
connected. Capstan stretches the tape forward, and this
leads to rotation submitting reel table.
Reel tables interconnected
belt, and the rotation
of submitting reel table leads to rotation of the
host. It looks like this is doubtful, but it works
By a voice recorder attached accessories, microphone,
remote switching, headphone - stethoscope, pedal - a
button to control by pressing the legs, AC Adapter, five
cassettes in plastic boxes, three batteries 12 v, and
documentation, description, warranty booklet. One of the
existing my original battery, I redid the container
under the battery 9 v, such as PP3. This voltage is
enough to power as a normal work recorder actually
stored in the voltage range 8 - 12 v (as in passport 6 -
12 v). To use the pedal, its connector is inserted into
the tape recorder, a headphone jack, microphone jack is
inserted into the pedal. Button pedal has a lock, and
every click, or includes, or disables voice recorder.
Connector for accessories is on the left, and to connect
the power supply to the right. The volume control,
recording level - between them.
In the photo on the left inside the
original battery 12 v. In the photo on the right is converted
into a container for batteries PP3.
Circuit television-adapter Minifon
The device came to me from Germany in perfect cosmetic
condition as if just from the factory, but not working.
The problem was in the engine. Under load it does not
rotate at all, and no-load starts to rotate with eerie
sounds, and quickly stopped, it gets jammed. Bulkhead of
the engine revealed that he had been tightened further
during assembly, and probably the first time he worked
through the factory grease. Lubrication of bearings tied
with quickly worked, and it was a shim. Perhaps this is
the reason the ideal safety device. After it broke, it
could simply remove a shelf, where it lay till the
present day. However, against this version says there
are two stamps inside. One - "28. Nov. 1961", the second
- "14. Juni. 1968". Warranty on recorder framed in 1961,
and it is probable year of manufacture. Where did the
stamp in 1968, it is not clear, perhaps it is the date
of a repair. Against this version says that the
apparatus was sealed with the factory seals. On seals
inscription Minifon, and the numbers 251. The final deal
with dates I have not succeeded.
lubrication and after correct assembly, to work, but it
was not the only defect. For prolonged storage, when the
metal shaft is pressed to the rubber roller, the rubber
formed crater. Such indentations formed on pinch roller and
the rubber roller, the axis of which is capstan. Pinch roller
had to be repaired, so as to find the same new nowhere.
Dent, I closed up with glue (Poxipol), and carefully handled, and
then put on top of the segment of the shrinking diameter.
Diameter roller with increased but not significantly,
and it normally works. To align promyatuyu rubber on the
second clip, I'm stuck at this place a piece of wire,
which raised the rubber, and almost completely
eliminated the dent. Now the unit is in excellent
In the photo on the
left is visible dent on the rubber pinch roller. In the
photo on the right spot removed.
Pinch roller a dent, and
after fixing dents glue (Poxipol).
In the photo on the
left renovated pinch roller in the prescribed form. In
the photo on the right renovated roller capstan. You can
see a piece of wire thrust into the rubber. Unfortunately, the
photograph dent repair before I forgot.
The electrical circuit and specification Minifon Attache.
Photo from the book by Roland Shellin "Minifon Spy in the
(Roland Schellin, "Minifon Der
spion in der tasche").
Manual Minifon Attache that came
bundled with the device
Warranty and some
letter associated with the warranty.
Brochure and price
In the photo below, price
and prospectus to the recorder Minifon Hi-Fi. It differs
from Attache more complex circuitry to 11 transistors,
providing bandwidth frequencies 40 - 12 000 Hz. They
were produced from 1961 to 1967.