The 220 (aka 20) is a power triode. It is used as an audio amplifier in early battery type radios from the 1920’s. 1 Cunningham CX-220 aka 20 Vacuum Tube. Hickok TV-7D/U test reads 22. This tube is from early 1930’s USA production.
Item Tag: Cunningham
1 Cunningham CX-220 Vacuum Tube RARE 1920’s Power Triode for Vintage Radios
The 220 (aka 20) is a power triode. It is used as an audio amplifier in early battery type radios from the 1920’s. 1 Cunningham CX-220 aka 20 Vacuum Tube. Hickok TV-7D/U test reads 22. This tube is from early 1930’s USA production.
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(3) CX-301-A Cunningham Vacuum Tubes – Good filaments – Free shipping in USA
The product is a set of three CX-301-A Cunningham vacuum tubes with good filaments as per ohmmeter. These vintage vacuum tubes are made by the brand Cunningham in the United States. They are original and not modified, making them ideal for vintage audio and video equipment. This product does not come with any custom bundle items.
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