Nagra SNST-R Manual de usuario

NAGRA SNST-R

OPERATING INSTRUCTIONS FOR THE NAGRA SNST-R KSA PART NUMBER 20 24002155

Parts indicated on the photograph on the previous page:

1 Case –lower half attachment screws

2 Supply reel

3 Rewind handle

4 Standstill brake

5 MAN / AUTO selector

6 Reel holder fixation

7 Take-up reel

8 TEST / BATT Control

9 Meter

10 OFF position lock

11 Pinchwheel

12 Phones Jack 2 x 600 Ω

13 Tape Tension Adjustment

14 Operating lever

15 Power and Remote socket

16 Mike / Line sockets

POWER SUPPLY

Batteries or rechargeable cells

Turn the SNST-R over and remove the base by loosening the three attachment screws (1) with a coin or screwdriver.

Insert two “AA” batteries or two 1.2 V rechargeable cells, with the positive pole (head) towards the spring-loaded contact and the negative pole

(base) against the serrated contact. To facilitate insertion and removal of batteries, the spring-loaded contact is compressed (Fig 1). Replace

the SNST-R’s base and tighten the three screws.

(Fig 1)

IMPORTANT

NEVER LEAVE DISCHARGED BATTERIES IN THE SNST-R: they could leak and the corrosive liquid would cause a great deal of damage.

TO OPEN THE SNST-R

To open and to close the lid, see Fig. 2 and Fig. 3.

Fig 2 Fig 3

Slide the thumb piece (Fig. 2) a short distance to the right and lift the lid. Disengage the rear hinge (Fig 3) to remove the cover completely.

OFF position lock

This locking mechanism (10) blocks the control knob in the OFF position to avoid inadvertent functioning of the recorder during transportation

(Fig. 4). If the main control lever (14) cannot be pressed, then verify the position of the lock.

Fig. 4

“MAN” OR “AUTO” SWITCH

This switch is not used in the SNST-R and should be left in the “MAN” position.

TAPE SELECTION

The desired capacity and quality of the recording dictate the choice of the tape. 18µstandard tape (TAA – RED reel) produces a better sound

quality than extra-thin 9µtape (THA – BLUE reel), which in turn has the advantage of allowing a longer recording time. A good compromise is

the 12.5µtape (TEA – GREEN reel) which gives the same quality recording as 18µ, although mechanical behaviour is slightly less. The

SNST-R is factory adjusted and optimised for our 12.5µTEA tape (in this case 0 dB=250 nWb/m).

Red Reel 18µGreen Reel 12.5µBlue Reel 9µ

Recording time 28 mins 38 mins 45 mins

Tape loading

The operating lever (14) is pulled out and locked in “REWIND & LOAD” position (Fig. 5). This disengages both pinchwheel (11) and standstill

brake (4).

Ensure that reel fixations (6) are aligned with catches (Fig. 6) of the reel holders to allow the reels to be fitted easily.

The supply reel (2) is placed on the left and the take-up reel on the right and both are held in position by rotating fixation bars (6) through an

angle of 90° (Fig. 7).

The tape is threaded as shown in Fig. 8, by passing the index finger through one of the holes closer to the centre of the reel, the tape is

pressed against the reel holder. Then by slowly turning the supply reel clockwise, the tape is rewound until only a few millimetres extended

beyond the point where it is held by the finger (Fig. 9).

It is now possible to wind on the tape by turning the take-up reel 360° anti-clockwise all the while maintaining the tape with the finger. If the

operation is carried out correctly then the tape will no longer slip on the right-hand reel and a few more turns will ensure firm positioning. Now

return the operating lever to the OFF position. The above method is most commonly used, being quicker and preventing the possibility of any

noise from the free end of the tape rubbing against the lid of the SNST-R.

Fig. 8 Fig. 9

Fig. 6 Fig. 7

CONNECTIONS

INPUTS

The two rear most green plastic connection sockets on the left-hand side allow the connection the microphones, or the SCLST-R line input

cable. The front most green connector is not used on the SNST-R.

“MIKE or LINE” (16)

The left channel corresponds to the upper track and the right channel to the lower track; the input signals originate from the SCLST-R line

input cable or from the Beyer MCE-7 microphones connected to the microphone connectors. The input impedance is 10 kΩand for 0 dB

during record the input level is 630 mV.

OUTPUTS

The outputs of the SNST-R are available on the two 3.5mm jack plugs (12) located on the front edge of the SNST-R where the HD 25-13

stereo headphones can be connected with an impedance of 2 x 600 Ω. If a line output is to be used then the output cable SCUCSTR is also

connected to this point. The output impedance is 2 kΩand the output voltage from a 0 dB signal is 630 mV.

OPERATION

TO OPERATE

The operating lever (14) has three positions for the following functions :

-OFF or Neutral : Position in which it can be locked using the locking cam (10) located next to the meter.

-ON position: The SNST-R functions when the operating lever is pressed in. The tape runs and the reproduced signal is present at

the output. However recording is not possible unless there is a connection at “Mike or Line” (16) input.

-REWIND & LOAD : By pulling the operating lever (15), the pinchwheel and the standstill brake (4) disengage.

IMPORTANT

Care should be taken not to leave the operating lever (14) in the ON position when there are no batteries installed in the SNST-R, since

prolonged pressure of the pinchwheel against the immobile capstan could cause damage to the rubber tyre.

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