Gallery of Photos for a visit to Metsähovi Radio Laboratory Visit to Metsähovi Radio Laboratory, photo collection

Visit to Metsähovi Radio Laboratory, photo collection

These photos cover some details of Metsähovi radiolaboratory telescope pedestal

The visit was done in the morning of 10th of July, 2001.


Climbing up the lower tower

The ladder trapdoor at the mid-level floor

New dish boxy support structure and (low left) part of mid-level floor edge and railing.

Dish fixing mechanics as viewed from under.

This one is the new dish at the site, but old fixing hole is visible below the new one.

Two views of right-side el-arm mid/upper half front-end from inside

General view of the receiver installations

Right-side El-arm mechanics from above.

One of two elevation drive servo motors (with speed encoder), and above it a stowage pin. All drive motors are identical.

The handle above the motor is for manual turning of the elevation axle; push it in, and turn.

Motor power is around 150-200 W. DC servo. (With brushes, not brushless!)

All motors are within the Az-fork, that is, Az-gear is stationary! (Which is customary with slewing-ring systems.)

Drive controller box; PC running DOS program, DC servo FET drives, safety interlock connections, etc.

Dish rear-side ladders to reach the dome apex

??

Az-fork and El-arm from below; the Az-fork structure is here merely covered with sheet-metal.

Cable pass-thru holes around the azimuth axle.

These cables are not rotating when the Az-fork rotates! The twist-around is implemented inside the az-axle mechanics.

The base tower mid-floor from below. Note the cable fall-thru path.

General view of the turning mechanics from below.

Note the ladder going up from the mid-floor to the upper floor.

Surface details of the new dish.

The auxiliary reflector assembly from side.

Pictures of the feed fixing structure; receivers are attached to that cone from their front-side, to give better stability when using higher elevations.

Side view of the tower and mechanics

Old dish rear support arms fixture points.

The "sun-disk" -- 11 GHz solar emission measurement

Pictures of the construction of the original telescope

Blueprints of the original pedestal