| Country of Origin | United States |
|---|
Check the listing for details. homebrew (DIY or custom-built) vacuum tube-based electronic test instrument. Condition: For parts or not working, Made in United States. Listed at 49.95 USD. Vacuum tubes (including glass envelope types, one marked "ST" or similar) point to pre-transistor electronics, typical of mid-20th-century test gear. Large electrolytic capacitors : One is a multi-section can (labeled 50 MFD, 25 MFD, 100 MFD, 20 MFD at 75°C) — common in power supplies or filters for tube circuits.
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