Radio Tourist
PMP-56 (Турист ПМП-56). The first Soviet tube portable radio,
and produced by large series. From 1955 to 1959 was made
more than 300 000 copies. Housing unit plastic, has the
dimensions 265 x 185 x 85 mm with all the details of
speakers and carrying handle. Weight without battery
1450 grams. The receivers were designed to work with
the battery, or from AC 110, 127 and 220 volts. To feed
yarns used in radio tubes, two batteries of 1,6-ФМЦ-У-3
connected in parallel. To supply the anode - Battery
75-АМЦГ-22 with a voltage of 75v. For the power from AC
applied stand with built-in power supply and the five
pin connector. In the bottom of the body also has a slot
receiver with built-in power switch button. Button is
pressed, when the receiver is placed on the stand, and
connectors are combined. At the same pusher button
switches the two groups of contacts in the diet of the
AC. To maximize battery power
filaments lamps provided the switch, switching
additional resistors in the circuit filaments lamps. The
switch is located inside the hull near the speaker
panels, and has two provisions. In "НОВ" (new batteries) in the chain of
threads included additional resistor in the "СТ" (the
old batteries) filament lamp powered directly. Resistor
wire, soldered directly to the switch. The
receiver is designed not only for tourists but also for
work in expeditions. It therefore provides the use of an
external antenna, in addition to internal (ferrite). To
connect an external antenna connector is located next to
lock the back cover. On the inside back cover sheet is
glued to the instruction manual. The scheme uses five
miniature radio tubes. Lamps mounted on the panel, which also has four vertical boards with radio
components. Selector button. The two right buttons when
you are fixed, and are intended to enable the receiver,
and select the range. Clicking on any of them turn on
and the appropriate radio frequencies. Pressing the left
button will turn off the selected radio frequency and
off the receiver. Near the
switch is a volume control. Tuning in to stations
carried by the handle of a large diameter, located on
the front panel. Design Corps unit is very good, and
even today in this style would be hard to come up with
better. The design is also worthy of praise, all done
solidly and reliably. My unit
was manufactured in 1956, and got me in good cosmetic
condition, but without stand - AC power supply. There
was no damage inside, I also found the place even had
all the radio tubes. However, the receiver was defective.
In the process of repair, I checked all the lights, they
were serviceable, but was burnt resistor R14, is
included among the disadvantages of the anode batteries
and battery filaments of tubes. This can happen if the
polarity of one battery. Currently, the receiver is in
proper working.
Video
review of radios, including Tourist
PMP-56
Photos can be enlarged
Battery, similar to the 75-АМЦГ-22, I made the eight
9-volt batteries, GP, type PP3. Since the new batteries
have a voltage of more than 9 volts, the total electric
power is not turned 72 (8 x 9), and 77 volts. We used
only the inside of the battery without the shells. Alkaline
Battery GP suitable for these purposes more than others,
as collected from items such as "galet". Others I have
known manufacturers use elements of type AAAA. Battery
size 90 x 63 x 38 mm. Weight 270 g. The body I have made
of foil PCB, and the image labels printed on
photographic paper. As the contacts I used buttons for
clothes, they came up perfectly.
Also add that collect similar battery from the battery
acid is not advisable, since the manufacturing process
time-consuming, and resource development received very
little. Unfortunately, in a given volume can accommodate
the required number of batteries but without shells.
Besides acid batteries are short-lived, and can be
inferred.
You should also pay attention to an unpleasant
feature of the push-button switch. Power unit off by
pressing the left button, and the removed fixing button
selected range, and all three buttons are not pressed.
If you press the off button not strong enough (not to
stop), the fixation of the buttons will be removed, but
the power is switched. In this case the receiver will be
silent, and apparently understood that he was not
included. That's the receiver I was turned on all night.
This 8-hour battery anode discharged from 77 to
70
volts,
and battery filaments of tubes, with 1,6 to 1,4 Volts.
At the receiver performance is not affected.
Homemade
battery
anode
75
v,
collected
from
8 batteries
to
9
v
type
PP3.
The
photo on the left view panel on the back. In the photo
on the right are clearly visible plates two-section
variable capacitor with air dielectric. Previously,
these capacitors were obligatory attribute of any tube
receiver.
The photo on the left
of the refined batteries "D" (instead of 1,6-ФМЦ-У-3).
On the positive contacts soldered caps, made of tin. On
the right picture the first version of the radio,
"Tourist" in a wooden case. For more interesting
information about these receivers can be found
here.
Technical
characteristics
Power wiring - combined: battery 75-АМЦГ-22 (anode) and
1,6-ФМЦ-У-3 (2 pc., Batteries, radio tubes filaments),
as well as the AC mains 110, 127, 220 volts. Consumption
of the battery and AC power is 0,6 and 4
watts, respectively, at the rate of 1 and 6 watts. The
receiver applied to the lamp 1K2П (1K2P - broadband
amplifier RF), 1А2П (1A2P - mixer - oscillator), 1K2П
(1K2P - IF amplifier), 1Б2П (1B2P - detector and
preamplifier LF), 2П2П (2P2P - postamplifier LF). In the
selenium rectifier used drumsticks ВС-35-27 (VS-35-27 -
for filaments of tubes), and ВСМ-2 (VSM-2 - for the
anode-screen circuits). Nominal
output power at the supply from 0.04 watts to 0.03 watts
battery.
Radio range: 150 - 415 kHz (LW, 723 - 2000
m) and 520 - 1600 kHz (MW, 187.5 - 577 m). Intermediate
Frequency - 465 kHz. The
maximum sensitivity of TU at an outside antenna - 300 uV/m,
with internal - 1000 uV/m
Electric circuit radio Tourist PMP-56 (Турист ПМП-56)
