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| electron Tube Data sheets |
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| Precision 660 |
The Precision 660 tube tester with my DIY socket adapter
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| Circuit diagram |
| Circuit diagram tubes part only |
| Tube-list in excel (updated 2014-03-18) |
| G140 adapter |
| TRC-HB |
| TRC-63-10 |
| TRC-63-10-s |
| TRC-65-08-15 |
| TRC-65-10-01 |
| TRC-65-10-25 |
| TRC-66-04-01 |
| TRC-66-06-25 |
| TRC-67-08-09 |
| TRC-68-10-01 |
| TRC-69-04-01 |
| TRC-70-02-01 |
| TRC-70-06-01 |
| TRC-70-11-01 |
| TRC-71-02-15 |
| TRC-71-06-01 |
| TRC-76-01-01 |