Nagra IV SJ Portable Stereo Tape Instrumentation Recorder Kudelski

NAGRA IV-SJ - Portable Self-Contained Instrumentation Tape Recorder for Scientific Analysis !

Specifications :
Detailed specifications, see the photos below

Track system: 2-track, 2-channel, stereo/monaural system
Tape speeds: 1 7⁄8 3 3⁄4 7 1⁄2 15 ips
Wow and flutter: 0.005% (15 ips)
Frequency response: 25Hz to 35kHz (15 ips)
Signal to Noise Ratio: 44dB
Total harmonic distortion: 1.5%
Output: 1.0V (line)
Dimensions: 333 x 242 x 113mm
Weight with batteries and tape : 7.3kg

Comes with :
1. Tape recorder
2. Leather bag
3. The original power supply - ATE 110 to 220V
4. Dust cover
5,6. Two types of cables: for recording and playback with RCA connectors.

Made in Switzerland (KUDELSKI)

CONDITION - Recorder is tested - PERFECT WORKING CONDITION !
Cosmetic appearance is excellent - please look closely at the pictures below !

For more details, look at the photos. If you need more photos - please ask me.

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Shipping WORLDWIDE - Contact me for shipping cost (Registered Airmail with tracking number)

The photos are taken from the actual selling item.

1972 saw the adaptation of the popular IV-S into the IV-SJ.This was an instrumentation recorder for noise and vibration measurement and other scientific audio analysis organisations. Equipped with special microphone pre-amplifiers, modulometer and stepped input attenuators the IV-SJ is used for a multitude of different environmental and industrialization applications.

Customers for the IV-SJ varied from NASA to Rolls Royce and Greenpeace.

Nagra IV-SJ - Stereo Nagra for instrumentation and logging. Pots are replaced with switches to set gain in precise steps, no limiters, and when present, the microphone inputs are for high-voltage unbalanced instrumentation mics rather than low impedance balanced with T-power and phantom.

Interesting and probably rarer version of the famous portable audio recorder, this Nagra is a highly specialized instrumentation recorder ! What sets this machine appart is that it has two 'direct' type wideband recording channels that have a frequency response of 2.5 Hz to 35 kHz, and one frequency modulated channel with a frequency response of 0 Hz (DC) to 4 kHz. It also has precision switched input attenuators with a resolution of 1dB (see the photos), an accurately calibrated 'modulometer' with Peak and RMS scales, and in-built physiological filters type A, B, C and D. In other words it is actually a precision recording sound level meter to the 'CEI 179 norm', and with a separate B&K measuring microphone, made this recording measuring instrument a popular tool for noise and vibration analysis.

The IV-SJ was a stereo machine destined towards the music industry, allowing musical performances to be captured in Stereo in a portable format !

Thanks for looking !