H
SECTION H — ELECTRICITY
 H03
BASIC ELECTRONIC CIRCUITRY
 H03J
TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS (indicating arrangements for measuring G01D; measuring, testing G01R; remote-control in general G05, G08; control of generators H03B)
 H03J 1/00
Details of adjusting, driving, indicating, or remote-control arrangements for resonant circuits in general (machine elements in general F16; coupling of knobs to shafts F16D)
 H03J 1/02
·  Indicating arrangements
 H03J 1/04
·  ·  with optical indicating means
 H03J 1/06
·  Driving or adjusting arrangements; Combined with other driving or adjusting arrangements, e.g. of gain control
 H03J 1/08 - 
H03J 1/12

Note(s)

Groups H03J 1/14, H03J 1/16 take precedence over groups H03J 1/08-H03J 1/12.

 H03J 1/08
·  ·  Toothed-gear drive; Worm drive
 H03J 1/10
·  ·  Rope drive; Chain drive
 H03J 1/12
·  ·  Friction drive
 H03J 1/14
·  ·  Special arrangements for fine and coarse tuning
 H03J 1/16
·  ·  Single control means independently performing two or more functions
 H03J 1/18
·  Control by auxiliary power
 H03J 1/20
·  ·  the auxiliary power being switched on as long as controlling current is switched on
 H03J 1/22
·  ·  with stepping arrangements actuated by control pulses
 H03J 3/00
Continuous tuning (combination of continuous and discontinuous tuning other than for band spreading H03J 5/00)
 H03J 3/02
·  Details
 H03J 3/04
·  ·  Arrangements for compensating for variations of physical values, e.g. temperature (automatic control of ambient conditions G05D)
 H03J 3/06
·  ·  Arrangements for obtaining constant bandwidth or gain throughout tuning range or ranges (automatic gain control H03G)
 H03J 3/08
·  ·  ·  by varying a second parameter simultaneously with the tuning, e.g. coupling bandpass filter
 H03J 3/10
·  ·  Circuit arrangements for fine tuning, e.g. bandspreading
 H03J 3/12
·  ·  Electrically-operated arrangements for indicating correct tuning
 H03J 3/14
·  ·  ·  Visual indication, e.g. magic eye
 H03J 3/16
·  ·  Tuning without displacement of reactive element, e.g. by varying permeability
 H03J 3/18
·  ·  ·  by discharge tube or semiconductor device simulating variable reactance
 H03J 3/20
·  of single resonant circuit by varying inductance only or capacitance only
 H03J 3/22
·  of single resonant circuit by varying inductance and capacitance simultaneously
 H03J 3/24
·  of more than one resonant circuit simultaneously, the circuits being tuned to substantially the same frequency, e.g. for single-knob tuning
 H03J 3/26
·  ·  the circuits being coupled so as to form a bandpass filter
 H03J 3/28
·  of more than one resonant circuit simultaneously, the tuning frequencies of the circuits having a substantially constant difference throughout the tuning range
 H03J 3/30
·  ·  Arrangements for ensuring tracking with variable inductors
 H03J 3/32
·  ·  Arrangements for ensuring tracking with variable capacitors
 H03J 5/00
Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner (for bandspreading H03J 3/10)
 H03J 5/02
·  with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings
 H03J 5/04
·  ·  operated by hand
 H03J 5/06
·  ·  ·  Settings determined by single indexing means with snap action
 H03J 5/08
·  ·  ·  Settings determined by a number of separately-actuated positioning means
 H03J 5/10
·  ·  ·  Settings determined by a number of positioning means mounted on a common support, which is adjustable to desired positions, a different positioning means being in operation in each position
 H03J 5/12
·  ·  ·  Settings determined by a number of separately-actuated driving means which adjust the tuning element directly to desired settings
 H03J 5/14
·  ·  operated by auxiliary power
 H03J 5/16
·  ·  ·  Settings determined by a number of separate positioning means actuated by hand
 H03J 5/18
·  ·  ·  Settings determined by a number of separate positioning means actuated by electromagnets
 H03J 5/20
·  ·  ·  Settings determined by a number of positioning means actuated by a second means adjustable to different positions by the same or by a second auxiliary power
 H03J 5/22
·  ·  ·  Settings determined by a number of separately actuated driving means which adjust the tuning element directly to desired settings
 H03J 5/24
·  with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection, for television channel selection (switches in general H01H)
 H03J 5/26
·  ·  operated by hand
 H03J 5/28
·  ·  ·  Tuning circuits or elements supported on a revolving member with contacts arranged in a plane perpendicular to the axis
 H03J 5/30
·  ·  ·  Tuning circuits or elements supported on a revolving member with contacts arranged in lines parallel to the axis
 H03J 5/32
·  ·  ·  Stationary tuning circuits or elements selected by push-button