ACROSS 1 Year Fleming invented diode vacuum tube. 3 This
quantity multipled by r.m.s. value of a.c. voltage will give peak voltage. 6 Slow record
player speed. 5 Difference frequency in kilocycles produced by mixing 1000·kc.
signal with 50·kc. signal. 9 Quantity by which peak value of a.c. voltage is multiplied
to obtain r.m.s, value.
12 One-half kilowatt expressed in watts. 13 Output frequency in
kc. of transmitter having crystal frequency of 2017.5 kc. and two doubler stages.
14 Lower limit of u.h.f. frequency band expressed in megacycles.
15 Large-size
hi-fi woofer.
17 Very slow record speed. 18 Year tetrode (screen-grid) vacuum tube was
developed. in reverse. 20 Mid frequency in megacycles of TV Channel 6 when
lower frequency limit equals 76 mc.
21 Total resistance of two 44-ohm resistors connected
in series. 22 Upper frequency limit in mc .. of super-high-frequency band.
24 Voltage drop across 20-ohm resistor when current flow is
10 amperes.
25 Number of feet in 12 yards of hookup wire. 26 Mid frequency of TV Channel
2 when upper channel frequency limit is 60 mc.
27 Actual filament voltage
rating of 6-volt vacuum tubes.
28 Popular-size TV screen.
30 Heater voltage of 35Z5 vacuum tube.
31 Separation in megacycles between TV sound and video carrier frequencies.
32 Number of zeros represented by letter K in stating resistor values.
33 Cycles in one megacycle. 34 Total voltage drop in series circuit when applied
voltage equals 50 volts. |
DOWN 1 Degrees of phase shift in voltage fed back to produce
degeneration in amplifier circuit. 2 TV aspect ratio; ratio of picture width to height.
4 Year Lee de Forest invented triode. 5 Voltage drop across 90-ohm resistor when current
flow equals 112 amperes.
7 Tape recorder slow speed in ips.
10 Wavelength in meters of 400-kc.
signal.
11 Fast record player speed in rpm (approx.).
14 Electrical degrees in one cycle of alternating
signal. 16 In resistor color code, number represented by green, white
and yellow.
17 Year pentode was developed.
19 Electrical degrees in one alternation of sinewave
signal.
23 Capacitance reactance of 1.0 ufd. capacitor at frequency of 60 cps.
24 Express 0.00271 henrys in microhenries.
27 Convert 650,000 watts to kilowatts.
29
Amount of capacitance in farads that will store 100 coulombs of electricity when applied
voltage equals 1.0 volt.
30 This number means "the end."
31 Grade
of solder often used in electronics work. |