This is Radio Frequency filter that operates at cryo temperatures of around -200C. It uses a free piston Stirling engine that is electrically driven to cool a chamber down to these very low temperatures. The chamber houses some electric components that can filter out unwanted signals. At room temperature it filters the signal but losses a substantial amount of signal strength. By using the cryocooler to cool the components to superconducting temperatures the signal can be filtered while keeping most of the signal strength.

This device is used to filter mobile/cell phone signals. In other worlds it helps make your phone signal better! It is surplus and may no longer meet its original specification. However Stirling engine enthusiasts will be interested in removing the filtering components and just using the Stirling engine.

You can see a really good video of converting one to generate liquid nitrogen Convert a Stirling engine to generate liquid nitrogen

The product is described as “.. is a highly selective and sensitive RF filter used in the receive path of wireless base stations. The SL Rx eliminates the trade-off between selectivity and sensitivity. The superior performance of the SL Rx enables wireless service providers to enhance customer satisfaction and increase their subscriber base by improving the quality of voice and data transmissions of their networks.”

We have the software and manual. It is sold as is, without warranty or support.

WE CANNOT SHIP THIS BY THE FREE (LANDMARK GLOBAL) COURIER SERVICE. THIS MUST GO BY FEDEX.