TransistorPro: Amp Repair

TransistorPro is the transistor reference tool built for guitar amp techs, repair professionals, and serious electronics hobbyists.

Pull a transistor off the board. Find its equivalent in 10 seconds. No more hunting through 10 websites mid-repair.

FEATURES:
- 29+ verified transistors with full specs (VCEO, IC, hFE, Pd, fT)
- Pinout Verifier — step-by-step multimeter guide for every package type (TO-92, TO-220, TO-3, TO-126, JFET, MOSFET)
- Manufacturer Cross-Reference — search Peavey, Marshall, Fender, Vox, Mesa Boogie, Ampeg, Orange, Yamaha, Roland, Boss, and Hi-Watt part numbers
- AI Repair Assistant — ask anything about substitutions, biasing, and fault diagnosis (Pro)
- Calculators — Ohm's Law, Bias Point, LED Resistor, dB Gain, Power/Heat
- Reference — pinout tables, substitution rules, Japanese/European/American cross-reference
- Works offline — core database available without internet

FREE: Full transistor database, pinout verifier, calculators, reference
PRO ($4.99/month): AI Repair Assistant + web search for live datasheets
EXPERT ($9.99/month): Unlimited AI + real-time component pricing

Built by a tech who spent years fixing guitar amps and searching for transistor equivalents the hard way. This app exists because that pain was real.