- WAD 2A3 PSE Tweaks - Part 3
- WAD 2A3 PSE Tweaks - Part 2
- WAD 2A3 PSE Tweaks - Part 1
- PhonoII 3.18uS correction
- Lowering feedback in KIT34 KIT6550 KEL84
- Lowering feedback in KiT88 and KeL34
- Simple Mains Filter and Spike Suppressor
- Solid State Diodes - Choice
- Triode and Pentode Connection for KEL84
- Shunt Pot Volume Control for Better Sound and/or Gain Reduction
- Phono 2 3 3S - ECC83 5751 - Cathode Bypass Caps - 3180uS 318uS mod
- Balance Control
- Adjusting Overall gain from Pre3 using the Shunt Pot Mod
- Tweeter replacement for WAD KLS3 MkII
- WAD PreII conversion to Cathode Follower stage
- Improving the DC Heater Supply - Part 2; KIT34, KIT6550, 300BPSE, 300BPP
- Improving the DC Heater Supply - Part 1; KIT88, KEL34, KEL84
- Converting Kit/Kat6550 and Kit/Kat34 Rectifier from 5U4 to 6D22S