1. © Bob York Basic Amp

2. © Bob York Amp with Tone Control

3. © Bob York Speaker Measurements VgVg VLVL R |Z| + - RcRc LcLc LmLm RmRm CmCm

4. © Bob York LM386 and LM358

5. © Bob York LM386 Amp

6. © Bob York Summing Network

7. © Bob York Test Circuit

8. © Bob York Tone Control Circuit

9. © Bob York 3.5mm Stereo Jack and Plug

10. © Bob York Microphone Circuit

11. © Bob York Microphones

12. © Bob York LF353

13. © Bob York MIC and Gain Stage

14. © Bob York Test Circuit

15. © Bob York Microphone Improvements

16. © Bob York Speech Filter

17. © Bob York LM384