Date With Lena M

Date With Lena M

Back in the mid 1950s there was made a decision in the USSR to develop new radar stations not as mobile, but stationary ones. It allowed to create big antennas, not to save on equipment and its dimensions, and to protect this equipment from frost and heat. One of such radar stations was named Lena M or P-70.  The station was built in 1960-68 for operation on the long frontiers of the country.

Date With Lena M

The station had a maxium power output per unit area of the antenna – 17000 W/m2. The power of the transmitter amounted to 500 W per a square meter.

Lena P-70 was the world first radar station with a complex probe signal. Compressing a signal 50 times Lena P-70 could detect targets at the distance of 2300 km (it was 10 times longer than the previous development).

Date With Lena M

There were built eleven Lena stations in general. One of them is in Mongolia.

All the equipment was placed in a two-storey building covered with iron and equipped with hermetic doors.

Date With Lena M

For transportation of the whole station to the site of its installation they needed two eight-wheel carriages, 35 gondola cars, 128 KRAZ-2556 trucks, 150 helicopters of V-10 type and 22 aircrafts An-22. The station was assembled by a special team consisting of 45 workers, the period of assembly was equal to 210 days.

Date With Lena M

“Heating is on”.

Date With Lena M

Control panel.

Date With Lena M

Date With Lena M

Date With Lena M

Date With Lena M

“Order of activation/deactivation of the stations”.

Date With Lena M

Date With Lena M

Date With Lena M

Date With Lena M

Date With Lena M

Date With Lena M

Equipment of the transmitter.

Date With Lena M

Date With Lena M

Date With Lena M

Date With Lena M

Date With Lena M

Date With Lena M

The station had four amplifying stages.

Date With Lena M

Date With Lena M

Date With Lena M

Air cooling tubes of the amplifyers.

Date With Lena M

Modular units of the the transmitter amplifyers.

Date With Lena M

Date With Lena M

Date With Lena M

Anode compartment of the basic oscillator.

Date With Lena M

In addition, on the second floor were the classroom, laboratory and workshop, rooms for spare parts and restroom for attendants, library, kitchen, toilet. Interestingly, the refrigerator with food was enclosed with hermetic doors.

Date With Lena M

Date With Lena M

Date With Lena M

Date With Lena M

Date With Lena M

Date With Lena M

Date With Lena M

“Soldier, the frontier is close, be vigilant!”.

Date With Lena M

Date With Lena M

Date With Lena M

Electric power system elements on the first floor.

Date With Lena M

The station was fully activated for 8-9 minutes (with operating voltage frequency converters) and 12 minutes – without them.

Date With Lena M

Date With Lena M

Date With Lena M

Date With Lena M

Date With Lena M

Mechanism of the antenna sweep drive.

Date With Lena M

Date With Lena M

Date With Lena M

Bantam tubes.

Date With Lena M

Date With Lena M

Parabolic reflector dimensions – 48×28 m. The whole structure was rotating for 360 degrees. The weight of the rotating part was 42 tons. The antenna could melt ice with thickness of 5 mm for 40 minutes consuming 300-350 kW.

Date With Lena M

Date With Lena M

Date With Lena M

Date With Lena M

Date With Lena M

Date With Lena M

Date With Lena M

Date With Lena M

Most of the cables were taken away.

Date With Lena M

Date With Lena M

Date With Lena M

Date With Lena M

Date With Lena M

Date With Lena M

Date With Lena M

Date With Lena M

Date With Lena M

via ralphmirebs

11 thoughts on “Date With Lena M”

  1. Thanks, Ralph Mirebs, for the excellent photo tour of one of the sites from the now unused network. There is a similar network in US which is being shut down and abandoned. (People in both countries should not worry, as their coverage is handled by newer installations, with the exception of near-space debris surveillance done by the the US sites.)

    Looking at your pictures I also admire your efforts and time – and the climb to the upper portion of the large ‘dish’ gave me chills; I very much appreciate the work you put into this photo-essay.

    I find it at once a sad, chilling, yet proud feeling to see places like this, to abhor the need for them and admire the engineering of the building and the fortitude of those stationed at them.

    This website, and yours, Ralph, if the translation software works well enough for me to spend time there, offer a wealth of insight. You and the others put in a lot of effort to bring stories to light, some that need telling, some that are simply a delight.

    Thank you.

  2. The 126 foot wide early warning radar at Camp Hero, Montauk, Long Island, New York. Built in 1960, shut down in 1981. Dish is kept up as a landmark for mariners. http://4.bp.blogspot.com/-yHctOI7P1F8/T9UJEHG8MzI/AAAAAAAAAO8/YqQX_y6UACc/s1600/IMG_0517.jpg

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