CZK - RM31 (Vertikalni tycova antena)

Vertikalni tycova antena RM31 s kapacitnim kloboukem


Tato vertikalni tycova antena byla vyvinuta pro pechotni verzi radiostanice RM31-P a cely antenni system byl umisten u rucniho dynama ZD 31-1 pohaneneho dvema klikami umistenymi na skladaci konstrukci se sedackou pro obsluhu tvorici s nositky a platenym obalem komplet MB 31-3 o rozmerech 230x540x260 mm s celkovou hmotností 21,5 kg.


Platene pouzdro RM31-5 v klasicke khaki barve obsahovalo 18ks tycek z kalene oceli s medenou vrstvou a lakovou povrchovou upravou. Kazda tycka v celkove delce 530mm mela na svych koncich po jednom vnitrnim a vnejsim zavitu. Sada v pouzdre obsahovala dale hlinikovou ruzici, sadu kotevnich snur, patni izolator a dalsi drobne prislusenstvi.


Dle potreby a aktualnich podminek bylo mozne ze sady sestavit dva typy anteny:


1. Standardni jednoducha vertikalni tycova antena. S pouzitim vsech 18ks tycek bylo dosazeno celkove vysky 8.6m


2. Zkracena vertikalni tycova antena s kapacitnim kloboukem. Pro vlastni vertikalni antenu bylo pouzito 12ks tycek v celkove vysce 5.7m a ze zbylych 6ks se sestavil s pouzitim hlinikove ruzice na vrchu anteny kapacitni klobouk. Takova kotvena vertikálni tycova antena cca 5.7 m vysoka s kapacitnim kloboukem (hvezdici) ma prostorovou slozku zareni potlacenou a je pro nektere typy spojeni vyhodna.


Vertikalni antena RM31 v tomto provedeni byla resena jako vertikal s pevnou vyskou a v obou pripadech instalace byla na pracovnim kmitoctu (2-5.995MHz) naladena/prizpusobena pomoci antenniho clenu RM31-3. Tento antenni clen byl schopen svym rozsahem kapacit a indukcnosti prizpusobit i kratke tycove anteny z pechotni sady RM31-P nebo zarice montovane napr. u automobilove verze RM31-A na terennich automobilech GAZ69 nebo dratove dipolove anteny 2x7m NVIS apod.


Antena nebyla vzhledem ke komplikovane instalaci a nutnosti dvojiho kotveni prilis oblibena a jednotky se jejimu pouziti pri cviceni (predevsim v zimnim obdobi) peclive vyhybaly.


73 - Petr, OK1RP


Zdroj:
Spoj-21-3 Radiova stanice RM 31. Popis, pouziti a provadeni oprav; 1961
Popis a navod k obsluze pro soupravu RM 31-P (RM 31-Pa)
Mat-spoj-I-31 Mala radiová stanice RM 31-P a RM 31-A. Popis a navod k obsluze
Vlastni poznamky ze vzpominek tatinka, OK1SP, 5. PLO/5.PLDP - Ochrany velitelstvi 1.tankove divize, Slany, VU 2478.

Vertical antenna RM31 with capacitive hat


This vertical antenna was designed and used only for RM31-P version of the radioset.(portable/field version)


The antenna suite contained the MB31-5 khaki canvas quiver with 18pcs of pipes made from tempered steel + copper after the temper. The pipes was 530mm long each with inner/outer thread. Also the aluminium rosette tool for capacitive hat, set of ropes, insulator base and some other ancils was included.


According to actual needs or field conditions it was possible to assemble 2 types of the antennas:


1. Full vertical radiator - where all of the 18pcs pipes was assembled together with total of 8.6m height.


2. Shortened vertical radiator - where 12pcs of the pipes was assembled together to make 5.7m tall vertical and rest of the pipes (6pcs) was used to create the capacitive hat on the top of the antenna using the aluminium rosette part. This type of the vertical antenna has higher radiation pattern angle if needed.


The antennas was designed as fixed height vertical radiators and in both cases antennas was tuned/matched on the operating frequencies (2-5.995MHz) using the antenna matching unit RM31-3.


This tuner was able to tune also the shorter antennas like mobile whip mounted on the GAZ69 vehicles as same as the wire antennas like 2x7m NVIS dipole etc.


As my daddy observed this vertical antenna was not so popular between the radio operators in Army as the installation was not engaging primarily in the winter time. In their troop squad the antenna has been installed just two times to practice it and never again...


73 - Petr, OK1RP


(v anglictine zpracovano pro http://greenradios.blogspot.com)