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* [[Media:Tektronix transformers design and manufacture.pdf|Tektronix Transformers: Design and Manufacture (PDF)]] | * [[Media:Tektronix transformers design and manufacture.pdf|Tektronix Transformers: Design and Manufacture (PDF)]] | ||
* [[Media:157- checked and tested tubes specs and procedure.pdf|157- Checked and Tested Tubes: Specs and Procedure (PDF)]] | * [[Media:157- checked and tested tubes specs and procedure.pdf|157- Checked and Tested Tubes: Specs and Procedure (PDF)]] | ||
* [[Media:Tek raw tube and aging specs.pdf|Raw Tube Aging (PDF)]] | |||