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Boffin's blog
tubes, amps and more…
Experiments
DHT Filament Heaters
Transformers
Tubes
Tube Amps
300B SE
KT88 SE UL
2A3 SE
1626 PSE
1625 PP
Dynaco 6v6 Push-Pull tube amplifier
Measurements
DIY Curve Tracer
uTracer3+
uTracer and ESP32
uTracerJS
ESP32 Spectrum Analyzer
CircuitGear Mini
FPGA
FPGA THD Analyzer
8Bit
GAL Programmer (Arduino)
EPROM Programmer (Arduino)
ZX Spectrum 48k
ZX Spectrum external 128k RAM upgrade
Other
8 Ohm Dummy Load
NIKKO TRM 40LA
Transistor Tester (MTester)
Ducky One Keyboard
About
ZX Spectrum 48k
External ROM
