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Tourist PMP-56



Used Google translator

     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 1 450 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)

Manufacturer - Riga plant "WEF", USSR.



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