Plantronics SHS1890-25 Push-to-Talk Amplifier

This product has been discontinued.

Description

Plantronics SHS1890 PTT with carbon type microphone amplifier, PJ-7 connector, and selectable switch operation (momentary or locking modes). Compatible with H-Series headsets.

Receiver - Plantronics SHS1890 allows the use of a wide variety of receiver styles. In addition to the characteristics listed in the table on the reverse side, each receiver has the following features:

Acoustic limiter - Solid-state limiting device across the receiver transducer
Frequency range - 300 to 3300 Hz
Distortion - <5%

Receiver Characteristics of Tops Used with SHS 1890 Push-to-Talk Amplifier

Plantronics Top	StarSet III H31CD	StarSet III H31/H31N	TriStar H81/H81N	Supra IV Monaural H51/H51N	Supra IV Binaural H61/H61N	Encore Monaural H91/H91N	Encore Binaural H101/H101N
1kHz Sensitivity (dBPa/V, ±4 dB)	20.5	19.5	22.0	30.0	24.5	Wide band: 26.0 Narrow band: 37.0	Wide band: 19.5 Narrow band: 31.5
Receiver Impedance (ohms, at 1 kHz)	600 ± 150	480 ± 50	450 ± 112.5	192.5 ± 57.5	385 ± 115	Wide band: 205 ± 30.8 Narrow band: 250 ± 37.5	Wide band: 395 ± 59.3 Narrow band: 440 ± 66
Source Drive Impedance (ohms)	600	10	10	10	10	10	10
Measuring Device	Bruel & Kjaer 4157 Ear Simulator	Bruel & Kjaer 4157 Ear Simulator	Bruel & Kjaer 4157 Ear Simulator	Bruel & Kjaer 4153 Artificial Ear	Bruel & Kjaer 4153 Artificial Ear	Bruel & Kjaer 4157 Ear Simulator	Bruel & Kjaer 4157 Ear Simulator