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发表于 2010-12-7 18:06:02
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GX-747个人认为非常漂亮,在民用级别上完全满足要求了,有待DBX版本的,可惜上次没有拍到,只好退而求其次,GX-646本人也非常喜欢。
2 m( s3 y1 i- d# b; D: F& e' y各项指标如下:! N- g5 r4 I+ ^1 C1 v, l
% E4 A. ]" e$ X; K7 v/ g
Track System….4 Track 2 Channel Stereo System 2 ]) U* B% T: B" F2 j4 l+ g* K& O
Reel Capacity....Up to 10” Reel " O8 n! ?! V6 {- I) o* F8 q2 q8 @
Heads....5 g8 w' @6 i6 h2 r
GX head for recording x 2; 9 d: y: D$ K* z( p
GX head for playback x 2; 4 M6 |8 D) u) a; y! @. C
Erase head x 2 + ]; a; [# `/ ]: {9 G" y/ _
Motors....
0 y: I+ Y) N; G5 n5 y$ rAC Servo motor for capstan drive x 1; & X9 W+ M% Q% u$ [/ l, ^+ C
AC Eddy current motor for reel drive x 2
% |& C! W; f/ b+ }8 {% A; S- nTape Speed....3 E) |! L" N$ q/ \3 y4 |
19 cm/s +0.8% (7 ½ ips.);
7 \- g8 l4 I; w. P. J; C) K/ N: I9.5 cm/s +1.0% (3 ¾ ips.) ( ~+ f* ^9 J& j0 g
Wow and Flutter....
6 s4 B/ p2 q2 c b5 l% v7 l/ ~Less than 0.03% WRMS at 19 cm/s;
, s5 e1 {3 M* mLess than 0.04%WRMS at 9.5 cm/s * M6 ^7 {- o# B1 S) S6 d# Q- i, G
Tape Winding Time....75 sec. using 360 m (1,200 ft.) Tape # A& p5 B1 s6 h* z- B0 c
Frequency Response....
2 u: [* s6 Q' v. h0 Y25 to 33,000 Hz +3 dB at 19 cm/s; # X0 v9 r3 ~( E+ S6 I+ g8 g
25 to 26,000 Hz +3 dB (0 VU);
2 g% |- N8 M: n25 to 33,000 Hz +3 dB at 9.5 cm/s; ) r. X6 a9 _: T: n# \6 N8 F
25 to 15,000 Hz +3 dB (0 VU)
% e' g" ?# o: M2 K- G# wSignal to Noise Ratio....Better than 65 dB (19 cm/sec dbx switch: OFF)
6 j1 j4 \3 B T* _Dynamic Range....128 dB (dbx switch: ON, 1 kHz, peak recording level)
. b. W( T( c( u* M3 JHarmonic Distortion....Less than 0.4% at 19 cm/s * G% o$ E* _( p' V
Input....
+ ]& n; ] t J& a3 SMIC: 0.25 mV; Required microphone impedance: 600 ohms;
7 R# W2 W4 [/ g2 R( F5 e. H& FLine: 70 mV ( W9 Q5 S' d/ K7 T( t& }
Output....( X' `2 {% v( ]4 A
Line: 410 mV; 6 B. ~+ C+ y' }/ `) @
Phone: 1.3 mW 4 F5 _8 O% V& m% c
Power Requirements....110V, 120V, 220V, 240V; 50/60 Hz switchable & u# H2 B! u$ d% q
Dimensions...440 (W) x 493 (H) x 256 (D) mm; (17.3 x 19.4 x 10.1 inches)
8 [7 u. J9 h5 x. h- F! dWeight....23.2 kg (51.0 lbs) |
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