{"query": "Varactor — tuning by voltage", "count": 20, "results": [{"id": "card_n_f9e74aa145cc", "title": "Varactor — tuning by voltage", "shelf": "science", "surface": "secular", "snippet": "A reverse-biased junction is a capacitor whose plates move with voltage — so voltage\ntunes frequency. The law that seals is exact: since f ∝ 1/√C, halving the capacitance raises\nthe frequency by exact"}, {"id": "card_c_106861f9474c", "title": "Varactor — tuning by voltage ↔ Oscillator — LC resonance, the bench's own S", "shelf": "connections", "surface": null, "snippet": "since f ∝ 1/√C, halving the capacitance raises the frequency by exactly √2  — a concord the card itself states; mined + verified."}, {"id": "card_src_book_17571", "title": "Piano Tuning: A Simple and Accurate Method for Amateurs — J. Cree (Jerry Cree) Fischer", "shelf": "gutenberg", "surface": "secular", "snippet": "Piano Tuning: A Simple and Accurate Method for Amateurs, by J. Cree (Jerry Cree) Fischer. Subjects: Piano -- Tuning. Read the full text (public domain): https://www.gutenberg.org/ebooks/17571"}, {"id": "card_c_b432c299ac6e", "title": "Varactor — tuning by voltage ↔ Electronics — the resonant chain, from Ohm's", "shelf": "connections", "surface": null, "snippet": "since f ∝ 1/√C, halving the capacitance raises the frequency by exactly √2 ... and the tempting error 'halving C halves f' seals BROKEN with residual √2 − 1/2  — a concord the card itself states; mine"}, {"id": "card_src_book_57354", "title": "Theory and Practice of Piano Construction With a Detailed, Practical Method for Tuning — William Braid White", "shelf": "gutenberg", "surface": "secular", "snippet": "Theory and Practice of Piano Construction With a Detailed, Practical Method for Tuning, by William Braid White. Subjects: Piano -- Tuning; Piano -- Construction. Read the full text (public domain): ht"}, {"id": "card_src_word_high_voltage", "title": "high-voltage", "shelf": "dictionary", "surface": "secular", "snippet": "high-voltage: (adjective) operating on or powered by a high voltage — syn: high-potential · (adjective) vigorously energetic or forceful — syn: high-octane, high-powered, high-power, high-energy"}, {"id": "card_src_word_high_potential", "title": "high-potential", "shelf": "dictionary", "surface": "secular", "snippet": "high-potential: (adjective) operating on or powered by a high voltage — syn: high-voltage"}, {"id": "card_src_word_transformer", "title": "transformer", "shelf": "dictionary", "surface": "secular", "snippet": "transformer: (noun) an electrical device by which alternating current of one voltage is changed to another voltage"}, {"id": "card_n_cdb747a427d2", "title": "Electronics — the resonant chain, from Ohm's law to the radio wave", "shelf": "science", "surface": "secular", "snippet": "One sealed chain runs the whole bench: Ohm's law (V = I·R), the capacitor's\nexponential clock (one time constant → 63.2% charged), the diode's exponential gate (current\ndoubles every ln2·nVT ≈ 17.9 mV"}, {"id": "card_sys_electrical", "title": "Electrical & electronic systems", "shelf": "systems", "surface": "secular", "snippet": "Effort = voltage, flow = current. Resistors dissipate (Ohm: I = V/R); capacitors store charge (potential); inductors store field (flow). Governed by Kirchhoff's laws and Maxwell's equations. The circu"}, {"id": "card_src_word_armature", "title": "armature", "shelf": "dictionary", "surface": "secular", "snippet": "armature: (noun) coil in which voltage is induced by motion through a magnetic field"}, {"id": "card_src_word_substation", "title": "substation", "shelf": "dictionary", "surface": "secular", "snippet": "substation: (noun) a subsidiary station where electricity is transformed for distribution by a low-voltage network"}, {"id": "card_src_word_electrosleep", "title": "electrosleep", "shelf": "dictionary", "surface": "secular", "snippet": "electrosleep: (noun) unconsciousness brought about by the passage of a low voltage electric current through the brain"}, {"id": "card_src_word_power_pack", "title": "power pack", "shelf": "dictionary", "surface": "secular", "snippet": "power pack: (noun) a device for converting a power supply to a voltage required by particular equipment"}, {"id": "card_src_word_crystal_pickup", "title": "crystal pickup", "shelf": "dictionary", "surface": "secular", "snippet": "crystal pickup: (noun) a cartridge in which an output voltage is produced by the vibration of a piezoelectric crystal"}, {"id": "card_src_word_linac", "title": "linac", "shelf": "dictionary", "surface": "secular", "snippet": "linac: (noun) ions are accelerated along a linear path by voltage differences on electrodes along the path — syn: linear accelerator"}, {"id": "card_src_word_dial", "title": "dial", "shelf": "dictionary", "surface": "secular", "snippet": "dial: (noun) the face of a timepiece; graduated to show the hours · (noun) the control on a radio or television set that is used for tuning · (noun) the circular graduated indicator on various measuri"}, {"id": "card_src_word_linear_accelerator", "title": "linear accelerator", "shelf": "dictionary", "surface": "secular", "snippet": "linear accelerator: (noun) ions are accelerated along a linear path by voltage differences on electrodes along the path — syn: linac"}, {"id": "card_src_word_stun_baton", "title": "stun baton", "shelf": "dictionary", "surface": "secular", "snippet": "stun baton: (noun) a weapon designed to disable a victim temporarily by delivering a nonlethal high-voltage electric shock — syn: stun gun"}, {"id": "card_src_word_stun_gun", "title": "stun gun", "shelf": "dictionary", "surface": "secular", "snippet": "stun gun: (noun) a weapon designed to disable a victim temporarily by delivering a nonlethal high-voltage electric shock — syn: stun baton"}]}