Raketa 3056A

Description

In the early 1980s, the russian quartz caliber Raketa 3056A was launched, which was an update to its predecessor, the Chaika 3056, where the electronics part was modified and a Lavet stepper motor was used instead of a 45° stepper motor.

The suffix “A” in Russia was used, to distinguish calibers with the same size (30mm) and same functions (56 = quartz with center seconds indication) and different parts.

Not only Raketa, but also Poljot, Slava and Chaika produced this caliber; here the Raketa version is shown.

As on most modern quartz movements, the crown mechanism is located on the inner side of the base plate. This plate with quite large with a diameter of 30mm (in reality even 31.0mm) and shows a well execution. We have a massive brass bearing for the minute wheel, two ruby bearings for transmission- and third wheel and a recess, into which the stator and the bearing of the rotor (with rubies) of the Lavet stepper are inserted.

You can also the thin spring levers, which, when the crown is pulled out, stop the movement, mechanically and electronically.

The rotor bearing with the stator are pushed and screwed into the base plate. The rotor is beared on its lower side only, because it is magnetically held in place.

We have to common gear trian of a quartz movement: The stator drives the transmission and reduction wheel, followed by center seconds wheel, third wheel and the center minute wheel.

When the crown is pulled, the transmission wheel is blocked mechanically, while at the same time, a pin of the electronics board is shortened to ground and thus halted.

With six jewels in total, the Raketa 3056A is made very well.

There’s a rather large electronics module, which carries the IC and a trim capacitor, which helps to adjust the frequency of the quartz resonator to 32768 Hertz.

The coil of the Lavet stepper motor is attached with two contact plates, unfortunately, on the specimen shown here, they are broken because of a leaked battery.

The Raketa 3056A uses an almost vintage-like huge U-shaped quartz oscillator. In the 1980s outside Russia, this was no longer state of the art, because everywhere else, tiny fork-shaped quartz were used.

On oddity of this movement is, that the dial side uses a cover, which secures crown- and changing wheel.

Technical data

Usage gallery