- 6N15 (6J6)Mini hybrid push pull amplifier
- 6N15(6J6) Mini Single End amplifier
- 811A Single Ended Class A2 audio amplifier
- RIAA network design for phono pre-amp(pdf)
- 6J1(6AK5) 6P1 Single End Class A audio amplifier
- One tube Regenerative radio power by one AA battery (build in inverter)
- One Lithium ion cell DC DC step up concept for Portable tube radio
- 6J2(6AS6) 6J1(6AK5) super hetrodyne tube radio power by 12V
- Homemade MC Phono Cartridge LOMC
- Homebrew TV (2006years Experiment)
- 6AB8/ECL80 1 watts Single End audio amplifier
- 6SN7 300B GZ34 single end Audio amplifier
- Rewind scarp transformer for vacuum tube project(pdf)
- MC34063 Low Frequency Boost Converter
- Simple 6V inverter using 2N3055 build in 1990 years
- Synthesis Willamite Flourscent powder
- Experiment with Vacuum pump for lamp and tubes
- One Transistor Audio amplifier power by Single AA cell
- 6P15 Triode Connection 1.2Watts SE audio amplifier
- 6C19 Triode Single End 2Watts Audio amplifier
- 6J1/EF95/6AK5 one tube audio amplifier 148mW
- DIY scan coil and focus coil for Radar CRT(2014)
- Repair Megger (insulation tester) 2017
- 8051 microcontroller SPI Wave player for music box
- Restore portable vacuum tube TV ECKO TX275
- Design and Build RCC converter
- Restore 80s 2Band MW/SW transistor radio.
- SuperHet tube radio with transistor IFT (rewind).
- Using EE16 ferrite transformer to clone ST-32 transistor radio output transformer.
- Make Rechargeable NEDA-213 45V battery and repair Emerson 838 radio
- Vacuum tube amplifier 6N2 6P15 with flyback SMPS power supply
- 6N15 (6J6/ECC90) 6V hybrid amplifier with TDA2282
- Restore Australian 1930s Sander Tube radio.
- Solid State Vibrator. (voltage step up)
- Discrete Transistor FM superhet radio.
- Experiment 2P2 battery tube to operate at Lower anode voltage (6V,12V,24V)
- Experiment with Flat CRT and sony Flat CRT 04JM.
- Faulty 2AP1 Scope CRT re-use for TV with magnetic Scan coil.
- 10 transistor FM radio power by 1.5V AA battery.
- Cassette Tape Experiment.
- Simple one tube audio amplifier.
- Simple one tube FM super regenerative receiver circuit analysis
- Experiment tube base colpitts style FM super regenerative receiver.