Description: SKU: 102 Offered for sale is a lot of two boards: 1. Ferrite memory board called 1-M. 2. Thermal stabilization board. The 1-M Plate outside dimension: approx. 4.49 x 4.49 x 0.16 inches Capacity: 1 ferrite toroid = 1 bit A 32 x 32 core memory plate stores 1024 bit (128 byte) of data Weight: approximately 0.07 pounds The 1-M board is very carefully soldered from a ferrite memory cube from the 5Ts19 "Reseda" system. (For a better understanding, a photo of the cube is shown in photos 10, 11 and 12. The cube itself is not included in the lot, these last photos are used purely for demonstrative purposes). The cube from the 5Ts19 "Reseda" system is intended for data exchange between the computer centers of the missile attack warning system and a separate command and measurement complex. The cube is enclosed in an aluminum case, lined with foam rubber on the inside, and covered with heat-insulating, silver-colored, fine-pored foam on the outside. On the front side of the case there is a massive heat sink and two handles for carrying and facilitating installation of the cube in a rack. There are two connectors on the back side, and two guides for the hardware rack slide on the bottom. The cube consists of 18 ferrite plates, each containing 1024 ferrite rings (32 by 32 in one group). The total volume of the cube is 2.25 kilobytes. Plates with ferrite rings alternate with special plates containing parallel wound threads of copper wire to heat the air inside the cube body. Despite the fact that the rack with the cube had to function inside a heated building of the computer center, in order to maintain a stable operating temperature, it is technically easier to initially heat the air inside the cube body, insulate the body, and then maintain the set temperature. Each thread on such a plate starts from a special contact on one side, runs in parallel turns through the entire plate, ending at another contact on the opposite side. The number of turns is different for different plates (on the outer 29 turns, on the inner 14). At the ends and in the center of the cube, plates with threads come in pairs, in other cases they come alternately with ferrite. To control the temperature, plates with two thermistors were added to the cube. Please, note, we do receive this question quite often and I feel it is important to cover it here, in the item's description, I quote: (Q): "do you know what the extra 8 bits at the end are for?" (Answer): We have several theories why they put extra 10 rings (there are 10 extra ones on the photo, not 8). Since they are installed by manual labor, one of the theories states that it is done for convenience of folks who were installing them. But it is only a theory. Manufacturer does not explain it and there is no one we can ask to clarify this matter. Condition:Very good, clean, well preserved, vintage condition.
Price: 135 USD
Location: Brooklyn, New York
End Time: 2024-09-10T17:27:10.000Z
Shipping Cost: 0 USD
Product Images
Item Specifics
Return shipping will be paid by: Seller
All returns accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money Back
Brand: Unbranded
Type: Memory
Vintage: Yes
