CZK - TP-25 (poľný telefón)

TP-25 (TP-25 - diskusze) - field telephone used by the Czechoslovak People's Liberation Army (CSLE), Slovak Armed Forces (SAF) and the Czech Army. Currently being replaced and phased out.


Manufacturer.


Purpose: to establish field telephone communication in combat conditions


For connection between two telephones is used double line, for distance up to 28 km. A crank inductor is used to ring the subscriber. A cable integrity check is ensured, it is possible to connect an additional telephone via jumper pins.


A telephone exchange TÚ-11(TÚ-11R) or TÚ-21 is used to form a telephone network and to connect individual subscribers.


The telephone is powered by its own power source (battery).


Tactical technical data:


Power supply: 1.4 V, max 150 mA
Dimensions: 100 x 170 x 270 mm
Weight: 3.5 kg (without battery)
Operating temperature range: -35°C & +45°C
Battery: dry, IEC S4, dimensions 57x57x115 mm, weight 410 g
URL : https://www.valka.cz/CZK-TP-25-polny-telefon-t37950#143640 Version : 0
Originally the pouzivala battery ctvercovym prurezem and air depolarizaci. Help I can not remember the typove mean hammer. To reach, it depends on pouzitem led (LK1, LK-2, PK-1, PK-2 ........) to dalkovemu to control the radio stations into the internal part of the TP25 pripojoval pridavek TP25RD. 1XGP.
URL : https://www.valka.cz/CZK-TP-25-polny-telefon-t37950#184772 Version : 0
On the bottom side of the battery is this:LN 82083,4 Bs S204/f.
Source:personal property..
URL : https://www.valka.cz/CZK-TP-25-polny-telefon-t37950#188329 Version : 0
The designation is perhaps this AS 4 but this one is the "civil" in the military was as far as I remember quite a bit less writing. But to them it was stated 1.5 (which should be properly here is 1.4 which is pretty special. This article is for civil use either the u Joints (later Telecom) as the power of their MB phones, or for the same phones of other users (railways, energy) the Article is stored closed and before use it is necessary to pull the two plugs on the upper side. I think that the production has already finished some time ago, and instead used the adapter on one round battery that is on the upper figures (but only guess).
TP-25 is strikingly similar to the German polnímu the phone, which was apparently the inspiration for the manufacturer.

The source of my own experience of service in the CSLA.
URL : https://www.valka.cz/CZK-TP-25-polny-telefon-t37950#188341 Version : 0
In fact, I would like to see how the MB phone (i.e. TP 25) is powered from a battery somewhere in the exchange. I'd be quite interested in that attraction. It's not possible. The microphone circuit is separated by a voice trnsformer and as we know DC current does not pass through it. So the microphone which is carbon is without power and even if we connect the circuit after the missing battery (otherwise it would be disconnected). To power it from the "counterpart" is simply not possible, the whole circuit would have to be changed and the microphone would be on the other side of the transformer (and the handset which in turn would suffer from DC current and would have a tendency to demagnetize (permanent magnets) would have to be separated by a transformer (or capacitor) The principle would be completely changed, so you can't just take the TP 25 and power it from the other side. Besides, components like the earpiece and microphone have different parameters for the MB (they are different and it's written on them). The components can be used from UB operation but in doing so the parameters will deteriorate. Since I did this for a living in civilian life I can say that for sure Smile MB phone cannot be operated like UB. And the PBX 11 does not allow to power the devices at the other end.
URL : https://www.valka.cz/CZK-TP-25-polny-telefon-t37950#188380 Version : 0
TP-25 bol always napájaný of batérie, etc if bol pripojený in took vybudovanej sieti (used sme him on strážnych stanovištiach ešte after the year 2000) and in the case of zhoršenia spojenia sa immediately menili batérie. On napájanie sme used nabíjateľné accumulators (batérie)..
URL : https://www.valka.cz/CZK-TP-25-polny-telefon-t37950#188389 Version : 0
We often used "flat" batteries in the seventies, it increased the range quite a bit but the microphone suffered a lot (had to be changed quite early) the original batteries were often cracked (bakelite casing) perhaps from frost or maybe they were badly sealed, so replacements were sought and the flat battery fit nicely diagonally.
URL : https://www.valka.cz/CZK-TP-25-polny-telefon-t37950#188392 Version : 0
Listen guys, I am here reading exclusively on the use of the pair, but I know that at military service, we always were pulling just one wire - the other was the ground! It is true that the pair was about the connection better, but we had it even on the pionýráku (about 1957) and I know that it was one wire!
You don't know how much it gives one an inductor (In, And)?.
URL : https://www.valka.cz/CZK-TP-25-polny-telefon-t37950#190343 Version : 0
The inductor gives 120V on empty and about 75V loaded, Amps are minimal and not given.
Even the way you describe it is with two "wires: Smile of course it goes with the ground, but it is not very good enough to reduce the range, and when I was in the army the cable had two wires (cables) in one package, so it was pulling clearly only the one "wire" but it was a two-line.
URL : https://www.valka.cz/CZK-TP-25-polny-telefon-t37950#190525 Version : 0
Just for echt enthusiasts, what is stamped on the pertinaxu the last picture is actually a diagram of the inductor, the one is at rest bridged with (into short circuit ) the contact at the end of the anchor, when you rotate the loop slightly axiálně moves towards the outside (that's why there is the arrow which shows the direction of the shift of the loop and anchors the inductor) and thus an inductor gets from the short circuit and begins to produce alternating current (the transfer frequency is "stabilized" at around 25 Hz, it is not about the stabilisation in the truest sense of the word, but the fact that the average person in addition to the resistance manages to make a given number of turns). Překlemování inductor, secondly, prevents its damage and mainly it switches off of the circuit during the call.
Source : once again own memories of the period of VZS and work at the joints.
URL : https://www.valka.cz/CZK-TP-25-polny-telefon-t37950#263088 Version : 0
Used to be PK-1 and PK-2 - 1 core and 2 core field cable - guaranteed range 25 km (that's why PK25!) in the army we used to say - TP-25 - CONNECT THE WHOLE WORLD...
URL : https://www.valka.cz/CZK-TP-25-polny-telefon-t37950#280893 Version : 0
For discussion: originally they used cells called AS2, but even these had only 1.4 V, this is due to the perincipient of the air depolarization used. The capacity of the cell was about 20Ah and the storage life was 12 months versus 6 months for conventional monocells. AS4 is just a more modern version. The difference was e.g. in the use of plastic plugs instead of cork plugs.
In the picture I am sending preparations for remote control of RM31Ma TŘINEC, RM31 and R105-8 (ASTRA) radios.
The use of a single wire is possible, but forbidden in combat conditions, as it will be possible to eavesdrop on calls using a current flowing through the ground. This was possible up to a distance of about 2 km.
Emergency telephoning was also possible without a battery, by shouting into the handset see. Mr. Bell's telephone. Even if a 2.2 k ohm resistance was connected in the line.
URL : https://www.valka.cz/CZK-TP-25-polny-telefon-t37950#296694 Version : 0
At the time of my VZS, it was common to use flat batteries, because the standard articles were apparently scarce, moreover, most of was for some reason (frost?) cracked and older than 5 years, so their paametry were outside the assumptions. On the battery with the higher voltage of the phone of course worked, but led to excessive wear and tear on the microphone. Less knowledgeable (well most) of it replacing the microphone of the conventional phones, which has different parameters (resistance) and, of course, deteriorated the characteristics of the instrument.
Phone without battery, of course, was possible, but it was the "simplex" so, either I scream or I listen to, in addition, it was limited by the parameters of the guidance. Personally I have not experienced that we would use the earth as one conductor, already in the seventies was the standard I use cable PK-2 so it was not the reason..
URL : https://www.valka.cz/CZK-TP-25-polny-telefon-t37950#296703 Version : 0
Source: own collection
CZK - TP-25 (poľný telefón) - Scéma telefónu TP-25

Scéma telefónu TP-25
CZK - TP-25 (poľný telefón) - Schéma prípravku pre ovládanie rádiostanice rady ASTRA

Schéma prípravku pre ovládanie rádiostanice rady ASTRA
URL : https://www.valka.cz/CZK-TP-25-polny-telefon-t37950#415785 Version : 0

Diskuse

Good day,
they can be somewhere to get hold of the original microphone and the handset in this phone? Thanks for the report..
URL : https://www.valka.cz/CZK-TP-25-polny-telefon-t37950#370609 Version : 0
It will probably no longer a problem today, the original handset should be MB, therefore, with an impedance of 2x100 ohms, as far as I know made only of a metal and the production seems to have ended sometime in the seventies. The microphone should be marked also MB and as far as I know and its production has been discontinued no longer in the same time. You can also use the newer (and more affordable) inserts from the phone with číselnicí, but you have other parameters and the parameters of the TP is slightly worse. Only where it is (besides the museum) it was possible to find are about different yourselfer, the former employees of the connections and maybe radio amateurs..
URL : https://www.valka.cz/CZK-TP-25-polny-telefon-t37950#370611 Version : 0
I have a bag of headphones, just write to my email on the web vhtm.valka.cz
URL : https://www.valka.cz/CZK-TP-25-polny-telefon-t37950#415790 Version : 0
Does anyone have any spare MB inserts please ?
URL : https://www.valka.cz/CZK-TP-25-polny-telefon-t37950#678149 Version : 0
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