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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。
# c2 F' ^- ^6 K# @6 T: Q* G9 C各项指标如下:" c; k* A' R0 o6 h/ u
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Track System….4 Track 2 Channel Stereo System
9 u1 s. v+ k5 A+ J; M6 gReel Capacity....Up to 10” Reel 7 k/ T4 y- M3 V8 U
Heads....
6 g1 p6 G, U |" O" I: Y; y+ E: qGX head for recording x 2;
$ P7 X% I* \3 c& G4 G/ ^GX head for playback x 2; : D" _0 `5 r. O
Erase head x 2
# Z8 R, b5 n n: q5 gMotors....8 l; ?% Y+ r; f. i4 y
AC Servo motor for capstan drive x 1; 7 R% e* X6 x6 o0 M0 }. u0 X% ~
AC Eddy current motor for reel drive x 2
, Y+ q5 W. d' Z! n* j9 [Tape Speed....9 | g! {- X' O0 W9 R
19 cm/s +0.8% (7 ½ ips.); ! Z) B* e6 ?' T
9.5 cm/s +1.0% (3 ¾ ips.) . X: f: U( w2 p* Y9 q% D
Wow and Flutter....5 N6 W8 {, }9 x8 o2 G9 [% Y
Less than 0.03% WRMS at 19 cm/s;
( w) X# P" O' tLess than 0.04%WRMS at 9.5 cm/s $ p9 @0 P5 q9 z) F4 ^
Tape Winding Time....75 sec. using 360 m (1,200 ft.) Tape
}, W" I5 C( m* R/ v/ eFrequency Response....3 s/ g. F* Z0 l- |. v. K$ \: `% F
25 to 33,000 Hz +3 dB at 19 cm/s;
/ d- u' }- |8 L$ g8 l; X25 to 26,000 Hz +3 dB (0 VU); ) p- }! M+ M$ x6 R0 Z$ T9 p% I
25 to 33,000 Hz +3 dB at 9.5 cm/s; " |5 x( ?- k$ O6 T
25 to 15,000 Hz +3 dB (0 VU) - h9 t6 ^; Q+ [* Q; K- j
Signal to Noise Ratio....Better than 65 dB (19 cm/sec dbx switch: OFF) / n# e, X: E# G! a( Z
Dynamic Range....128 dB (dbx switch: ON, 1 kHz, peak recording level)
: r- O" D @. l3 b9 A) j" PHarmonic Distortion....Less than 0.4% at 19 cm/s . z( u8 Q: H) ]7 U' A2 ?5 P# a
Input....% u8 P" o% M4 t" u# F* t
MIC: 0.25 mV; Required microphone impedance: 600 ohms; 8 w, r5 W' b9 f) }
Line: 70 mV
) M7 s' M" ]3 q; N* r0 gOutput...., b2 Q2 L: }5 Y
Line: 410 mV; 0 y4 [( `/ u7 r- j6 S3 B9 g1 E
Phone: 1.3 mW - p. r: d* ~3 I/ R6 @+ Y
Power Requirements....110V, 120V, 220V, 240V; 50/60 Hz switchable & F# ? a2 T' d4 ]. R/ m' u1 D
Dimensions...440 (W) x 493 (H) x 256 (D) mm; (17.3 x 19.4 x 10.1 inches)
, T1 i6 ^* N' @+ Z; f1 b5 OWeight....23.2 kg (51.0 lbs) |
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