Страница 1: ...element ARMO DUR case Million Cycle leaf type switch controlling microphone and external relay or switching circuits Modular construction Exceptional ease of field service Life time hang up button and mounting bracket TRIPLE FLEX cable provides exceptionally long life APPLICATION The Model 507B microphone is highly recommended for all types of mobile communications for hams industrial and commerci...
Страница 2: ...voided SPECIFICATIONS TYpe Dynamic Frequency Response 100 to 5 000 Hz see Figure 3 6 I0 Z s o C W c j I0 W L L I I I I l I l l l l l I I l l l l l l l I J 20 50 100 lpO0 lO 000 Pop00 FREQUENCY IN HERTZ TYPICAL FREQUENCY RESPONSE FIGURE 3 Output Level at 1 000 Hz Open Circuit Voltage 39 0 dB 11 2 mV Power Level 58 0 dB O dB 1 volt per 100 microbars 0 dB 1 milliwatt per 10 microbars Impedance Microp...