recorder. Made in the USSR in Voronezh in 1977. This
model is an extension of an earlier model of the video
VMP-1", which began producing in 1974, and that was
almost an exact copy of the Japanese video recorders
Sony AV-3400 and Sony AV-3420. The latter differ from
each other recording standard, AV-3400 - 30 fps,
AV-3420 - 25 fps. Recording on a chrome-oxide tape 12,7
mm (1/2 inch) and a thickness of 27.5 mkm.
Video recorder provides:
- Sound recording and a black and white video from a TV or
- The imposition of a soundtrack to a previously recorded
with a microphone
- Video playback on the camcorder screen and sound through
headphones or through the TV
- Still playback on a TV or video
- Erasing of sound and video
- Rewinds the tape in either direction
is supplied from the AC adapter BPVM, or the battery
voltage 12. The recording system is helical, two
rotating video heads FM signal. Recording, playback - no
less than 35 minutes on a reel. Belt speed - 16.32 cm /
sec. Resolution - at least 250 lines. Audio range 80 -
10,000 Hz. Dimensions of the video recorder - 295 x 272
x 153 mm excluding protrusions, legs, hands. Weight
about 9 kg.
As I wrote
above, the design copied from the
Sony AV-3400, but
there are some differences.
In the photo below - Japanese original.
and wiring copied completely, but there are differences
in the design of the housing. In the Soviet version of
the tape cast aluminum chassis is the middle part of his
body (copied from another, already colored model Sony
AV-8400). The chassis with one hand attached deck kinematics,
and on the other - wiring board. The bottom cover is
attached to the chassis with four brackets and screws.
It provides good strength of the assembly, and easy
access to the internal recorder. In the Japanese version
of the chassis is made of hard aluminum sheet. It is
inserted into the iron casing, and attached to it with
eight screws. This design also provides the necessary
strength, but complicates disassembling recorder.
Russian designers have finished unit rotary heads
Japanese there is a lack URH
design. Brush commutator motor URH
conductive adhesive bonded to the flat springs, which
cover the foam inserts that provide the necessary
clamping force brushes to the collector. Over time,
subtle sag springs, foam collapses and brush contact
with the collector disappears. In Soviet URH
pressed normal brush springs, and similar problems do
not arise. Appearance of Soviet URH
makes a good impression, they look better than the
Japanese, and they work even quieter than the Japanese,
who are a little noisy during rotation.
I have three
recorder "Electronica-video" different years
of release, and all three were fully functional URH.
For comparison, that before I was able to repair some
recorders Sony AV-3400 and AV-3420, and in all cases we
had to sort URH to restore
contact with the collector brushes. Kinematics in
recorders made of sufficient quality, and comments on it
there. However, the electronics is not so good. First of
all, conspicuous abundance of wires that are in the
Japanese version is not as noticeable. Harnesses made in
the Soviet and wires themselves as poor. Also, there is
a known problem with electrolytic capacitors. Domestic
K50-6 in contrast to the Japanese, do not
pass the test of time, and most of them should be
changed. All my existing recorders kinematics and
URH were serviceable, but had
problems with the electronics. This video recorder all
cool, and was even video output, but speed
URH was not stable. This problem
could handle, and after repair tape works well. Also had to replace
all the Belts, and lubricate the bearing auxiliary motor.
Acquainted with the design of interiors and URH
Japanese original, please visit
Manual and the wiring diagram video
recorder "Electronica-501-Video" can be downloaded
You can also see the operating instructions on the
"Electronica-video_VMP-1", they are the same.
In total in the circuit 82 transistors, KT358V - 56 pcs.,
KT342B - 10 pcs., KP303V - 4 pcs., KT801B - 3 pcs.
KT603B - 2 pcs., GT321V - 2 pcs., GT403B - 1 pc., GT108G
- 1 pc., KT315G - 1 pc., KT807A - 1 pc., MP20B - 1 pc.
Of these, the video channel - 33 pcs., In a sound
channel - 8 pcs., In the scheme of Servo - 35 pcs., In
voltage regulator - 6 pieces.
The description of the video recorder
Electronica-501-âèäåî in magazine "Radio"
¹8 for 1974.
After repair the tape recorder works
normally. Video footage recorded with a VCR VHS
Recording from the TV to the video
From video recorder used a video camera
841" and the power supply BPVM model 501. Detailed
photo camera can be viewed on the
On the left is visible patch panel. In addition to
connectors for external power supply and the camcorder
has a separate connector for connecting the TV. In
"Electronica-video VMP-1" and a
Sony AV-3400 this connector is not. In the photo to the
right remove the battery cover
On the label is visible price 2100
rubles. That's about $ 2800 at the rate of 1977
this design different from URH
modern VCRs that the video heads mounted on the beam,
rotating inside a rigid drum - Housing URH.
The housing consists of two halves, fixed so that
between them there is a gap of about 1.8 mm. URH
installed horizontally, and the gap, wherein the moving
head is also horizontally, and the tape slides along
obliquely drum Guide band, fixed on its surface. The desired trajectory
of the tape gives the track struts and coil with the
tape at different levels. In modern VCRs head mounted in
the rotating drum URH, reel tape
are in the same plane, and the drum is angled URH.
More information about the structure of URH,
please visit Sony AV-3400. It should be noted that if
you copy was based on the very first modification of
Sony AV-3400, and the case URH
there was just such a design, with Guide band.
On page Sony AV-3400 is shown later versions, and the
Guide band on the housing there, but instead there is a
corresponding protrusion formed in the manufacture of
the body. In later versions URH
were also added three additional springs Pincher tape on
top, and hold it in position on the surface of the
I had the opportunity to
delve into Sony AV-3400 early versions, and I made a few
photos, including photos the
from Guide band. See the photo below.
the electronics boards visible familiar to Soviet
electronic picture - the confusion of bundles and
In the photo below right is one of the
electronic boards to get a better shot was visible
scheme of kinematics. Lower left - auxiliary motor.
Above it a large double pulley axis is capstan. URH
right, and above it a pulley, which is transmitted to
the rotation mechanism for winding and rewinding
On the left at the top and bottom of the
photo board motor control
Copied to the location and shape of the
board, and even the location of parts on the boards.
However, in this tape wiring is slightly different from
the original, in particular, added the relay switching.
In the first tape recorders similar
VMP-1" wiring was identical
Auxiliary engine, also a collector
By the way, in many publications on the
Internet incorrectly stated that
was a clone of the video recorder Sony DV-2400. The
similarity between them is, but there are significant
differences. For comparison, the photo below video
recorder - Sony DV-2400. In addition,
this system was strictly record only. It does notevenrewindfunction.
Rewindingthe tapecould beon
another recorder, or at leastuse a small
knobthathadbundledandstoredinside the lidof the recorder-In the upper rightcorner of the photo.Photo from
The power supply to the video recorder
function charger. On the front panel except the
indicator and Power provides a connector for battery
charging and a dial gauge. Output
voltage 13,5 v. Dimensions 235 x 115 x 80 mm.
Weight of 2.5 kg.