Akai GX-77 Service Manual
Specifications and Main Features
- Track System: Dual Channel System with a 4 Track
- Reel Capacity: 175mm Min. With Reel
- Heads:
- Two GX heads for recording.
- Two GX heads for playback.
- Two erase heads.
- Motors:
- A single FG Servo DC motor attached to the capstan drive.
- A pair of DC motors attached to the reel.
- Tape Speed:
- 19 cm/s +/- 0.8%(7 ½’)
- 9.5 cm/s +/-1.0%(3 ¾’)
- Wow & Flutter:
- 19 cm/s- WRMS is less than 0.03% and in accordance to DIN 45500 is 0.07%
- 9.5 cm/s- WRMS is less than 0.04% and in accordance to DIN 45500 is 0.10%
- Tape Winding Time: 80 sec time to end use of a 360 m(1200 ft) tape
- Frequency Response (Using a EE Tape):
- 19 cm/s recording- 25 to 33,000 Hz + 3 dB (-20 VU) and a 25 to 26,000 Hz + 3 dB (0 VU)
- 9.5 cm/s- 25 to 15,000 Hz + 3 dB 0 VU
- Signal to Noise Ratio: Outdoes 63dB while recording at 19 cm/s as per DIN 45500
- Harmonic Distortion: A minimum of 0.5 percent while recording at 19 cm/s.
- Input:
- Impedance of Microphone: 600onz
-Line:70mv(input impedance:47k ohms)
- Output:
-line:0.775 at 0 v,u
-required load: more than 20ohm
-phone: 1.3mv at 8 ohm
-din Input: 2.0 mv(input impedance:10k ohms)
-output: 0.3 volt
-dimensions: 440 x 244 x 227mm
-weight 17.0 kg
-power requirements as follows:
- 110/120/220/240 for everyother country
- 100v 50/60 for japan
- 120 60 for USA and canada
- 220 50 for other parts of europe
- 240 50 for UK and australia
- Power consumption:
- JPN 30W
- U/T: 50W csa 50W
- Note: For improvement purposes, specifications and design are subject to change without the notice.
Frequently Asked Questions
Q1: what is the tape speed of the device?
A1: the tape speed is 19 cm/s +0.8%(7-1/2ips.) and 9.5cm/s +1%(3-3/4ips.)
Q2: What kind of heads does the device possesses?
A2: As for the device, it possesses GX heads for media recording (x2), GX heads for media playback (x2), and erase heads (x2) as well.
Q3: Can you kindly inform me the weight of the device?
A3: With great pleasure as the weight of the device is 17.0 kg which is equivalent to 37.5 lbs.
Q4: What are the power requirements for this device?
A4:
- For Japan it would be a an input of 100V, 50/60 Hz.
- While for USA and Canada a 120V 60 Hz input will suffice.
- For the Continent Europe, excluding the UK, a 220V and 50Hz would be ideal.
- For UK, Japan and Australia, the best fit voltage will be a 240V 50Hz.
- While It would require a 110/120/220/240V, 50/60 Hz switchable for the other countries.
Q5: Also might I know what is the signal to noise ratio of the device?
A5: In respect to the mentioned query, the signal to noise ratio is greater than 63 dB in 19 cm/s during DIN 45500.
Q6: Finally and not the least, what is the time to wind up 360 meters of tape?
A6: In order to wind 360 m (1200 ft.) of tape it requires approximately 80 seconds.
Q7: What is the frequency response using a EE tape?
A7: The frequency response is 25 to 33,000 Hz at +/- 3 dB (–20 VU) for a speed of 19 cm/s while it ranges from 25 to 26,000 Hz at +/-3 dB (0 VU) for the same speed. At 9.5 cm/s it becomes 25 to 25,000 Hz while at +/-3 dB (-20 VU) the speed is 9.5cm/s at 25 to 15,000 Hz the speed remains the same at +/-3 dB (0 VU).
User Manual
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