Wireless Servicing Manual |
From inside the book
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Page 39
... choke . One remedy is to orient the choke to the position of minimum hum , just as in the case of an a.f. transformer , but it need not , of course , be disconnected . An alternative is to replace it by an astatically wound choke , such ...
... choke . One remedy is to orient the choke to the position of minimum hum , just as in the case of an a.f. transformer , but it need not , of course , be disconnected . An alternative is to replace it by an astatically wound choke , such ...
Page 61
... choke and capacitor as shown for a typical arrangement in Fig . 7.5 . When a choke is used , it is usually the self - capacitance which is of importance in the r.f. filtering and this may be as much as 3 pF - allowing for stray wiring ...
... choke and capacitor as shown for a typical arrangement in Fig . 7.5 . When a choke is used , it is usually the self - capacitance which is of importance in the r.f. filtering and this may be as much as 3 pF - allowing for stray wiring ...
Page 97
... choke is effectively in shunt with the tuned circuit , erratic tuning will occur if the choke has a sub - resonance within the tuning range . Such sub - resonances are liable to occur with sectionalized chokes . Each section has a ...
... choke is effectively in shunt with the tuned circuit , erratic tuning will occur if the choke has a sub - resonance within the tuning range . Such sub - resonances are liable to occur with sectionalized chokes . Each section has a ...
Common terms and phrases
a.g.c. diode a.g.c. system adjusted aerial amplitude distortion anode circuit anode current anode voltage bias resistor C₁ C₂ capacitance cathode cause chassis choke class AB coil common connected coupling decoupling decoupling capacitor defect detector eeeee effect feedback filter frequency-changer gang capacitor grid bias grid circuit grid current grid leak h.t. supply harmonics heater i.f. amplifier i.f. valve impedance inductance input instability interference intermediate frequency kc/s leads loudspeaker mains hum maximum Mc/s medium waveband milliammeter mistuning modulation mutual conductance necessary negative normal obtained occur ohmmeter operation oscillator circuit oscillator frequency oscilloscope output stage output transformer output valve parasitic oscillation pentode pick-up possible potentiometer primary push-pull push-pull amplifier r.f. stage R₁ R₂ reactance receiver reduce resistance resistor response screen secondary short-circuit short-wave shown in Fig signal speaker station superheterodyne switch test oscillator time-base trimmer triode tuned circuit tuning control usually V₁ voltmeter whistle wiring