539
Common name: Astatic 539
Production Status: Discontinued / Vintage
The 539 is a high-output, high-impedance noise-cancelling ceramic microphone for radio communication applications. It features a lip-bar for optimal mouth-to-microphone spacing and a DPD push-to-talk switch wireled for relay or electronic switching.
Electrical Characteristics
Frequency Response
100Hz - 3.5 kHz
Output Sensitivity
31.6 mV/Pa
Max SPL
Max SPL, THD:
Self Noise (CCIR)
dB
Self Noise (DIN/IEC)
dB-A
Output Impedance
-
Recommended Load
100000kΩ
Powering
Supply Current
mA
Alternative Powering
Switchable Options
Pad
Filter/EQ
Physical Characteristics
Connector
4-pin
Connector notes
Available Colours
Weight
226.7 g
Length
85.72 mm
Min diameter width
Max diameter
69.85 mm
Depth
33.33mm
Accessories
Included
Optional