Post AUiYhsHTP3hVFl0eCe by ChartreuseK@mastodon.sdf.org
 (DIR) More posts by ChartreuseK@mastodon.sdf.org
 (DIR) Post #AUiYhsHTP3hVFl0eCe by ChartreuseK@mastodon.sdf.org
       2023-04-16T17:16:50Z
       
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       Probably deserves a large post, but picked up a Lafayette Grid Dip Meter at the local ham swap meet yesterday. The grid dip meter is an interesting piece of test equipment, but what I want to show you is what's inside it.See that small metal can? It's not some early transistor, it's a 6CW4 newvitron. It's a vacuum tube, showing the incredible miniturization possible.
       
 (DIR) Post #AUiYht56QXOpjgEHYm by ChartreuseK@mastodon.sdf.org
       2023-04-16T18:15:56Z
       
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       Sorry got the name confused there when typing it in from my phone. It's a NEWVISTOR not a newvitron (kinda got it mixed up with the newvicon video camera tube from the 80s). http://www.r-type.org/exhib/aaa0274.htm
       
 (DIR) Post #AUiYhtYsdpDdE2A3yS by publius@mastodon.sdf.org
       2023-04-16T18:21:57Z
       
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       @ChartreuseK Nuvistors were prized for the input stages of instruments owing to their extremely high impedance with a small imaginary component (due to having very small electrodes and inter-electrode spacings compared to conventional tubes), and many models of instrument were all solid state except for a Nuvistor input stage.