Neve 1058 Channel Amplifier 电路图.pdf

V. - *- - Channel amplifi er type 1058 is designed to accept signals from microphone and line sources and raise them to 0 dBm for feeding a 600 ohm load. Low noise and distortion and generous overload performance are important features of this amplifi er. High, mid (presence) and low frequency controls are included. A ten position input sensitivity switch covers the range 0 to -80 dBm. Two inputs are provided for line and microphone use. The line input is selected on the fi rst three positions of the sensitivity switch (0 to -20 dBm). The microphone input is selected on the remaining 7 positions (-20 to -80 dBm). The amplifi er is housed in a completely screened case with removable side panels and is fi tted with runners to slide between the rails of the I.S.E.P. (International Standard Equipment Practice) modular system. All con nections are made on a multi-way in-line connector socket at the rear which engages with a mating plug when the amplifi er is pushed home into the console desk or frame. Individual plug-in printed circuit amplifi ers are used for each stage. The sensitivity switch operates by varying both feedback and attenuation to maintain wide dynamic range at all settings. Frequency correction and fi lter characteristics are obtained by the use of selective feedback. Generous use of D.C. feedback results in extremely stable operation over the range 0 to +55C. FRONT PANEL 1. Sensitivity. Rotary switch giving 10 positions from 0 to -80 dBm (ref. 600 ohms) with microphone/line CONTROLS changeover at -20 dBm. 2. H.F. continuously variable boost and cut. 3. Presence frequency selection. 4. Presence amplitude control. 5. L.F. continuously variable boost and cut. BACK PANEL Amphenol 15-way connector. Rupert Neve ?,. . J- . 5- 00 KJiftttAX.V - . %. 10- * * . IT- f I O O t * - . KA1-F -. TK/CK. 7a- Hi: N 2 0 0 01 C 0 0 0 . 0 0 0 2 0 . 0 Frequency in cycles per second !058 CHANNEL AMPLIFIER PRESENCE FILTER 7,2-5,3-5,5-0and 7-0 KHz 1.000 Frequency in cycles per second 1 0 . 0 0 0 2 0 . 0 0 0 Rupert Neve .; ;< i .5. . ; . . ,W f w . S , : $j, r. j : 6 ; : 1 i I I rrrr kr. m k :i -. . M : yAftr * *. : .; *T*f y pwt warmv* m *) in . mOi gAjNnv. w!. !. O : ) . s O Q VWV- + f V W h R V I i + c O 00 u) z o X a. o a o H UJ fQ:*: o o OQ I O O * ) o & 11 i i IJ l i . ZJ N P C o C O I JE/iAflgq lHZ m?Lflft B) OA. :<-?. U / i o C i= I I - C Q*iv % ViST. NoiiB -r ojft, j * l$ASo-oxC-99 J/?-, 3 3 - loof 10 JB OOXf, -$ JB /JOa - zoof 2$J8 OOZ-7 t - 30 AS- & U - lco.? 36 dB 0 0 $6-*6 J8-.