Hivac Y220 Harries beam tetrode
- Made:
- London
- maker:
- Hivac Limited
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LicenseBeam tetrode, Hivac Y220 Harries
Science Museum Group
© The Board of Trustees of the Science Museum
Beam tetrode, Hivac Y220 Harries, made by Hivac Limited, aka the High Vacuum Valve Company, London.
