IN TRADE

20 kHz Frequency Response 70us Equalization Test Tape

Suitable for Playback Frequency Response adjustment of any Cassette Tape Deck using an AC millivoltmeter

Recorded on new TDK, AMPEX or TEAC Chrome tape

Each Cassette Tape (except 5 Hz RAMM) is a Full-track Master tape (not a copy). Cassettes are recorded OFF SHELL using an OTARI 0.15" (3.81mm) Reel-to-Reel MX-5050BIII-F-P4 Production full-track tape recorder and professional test equipment. The Capstan motor of the tape recorder is controlled by digital Quartz- Locked PLL. This can work at standard speeds with 0.01% accuracy, and at any speed from 1-7/8 to 30 ips using an external clock generator. (If required a cassette can be recorded at 30 IPS)

Reproduction or Playback Head of the tape recorder is a 4-track 4-channel head to measure Level unevenness @ 400 Hz. PLEASE NOTE. Level unevenness is checked totally across the tape (not along the tape) before recording. Tapes with difference in Level more than 0.2 dB are discarded

Reproduction Equalization is calibrated using a Constant Magnetic Field Transducer which has been designed by GennLab.

Standard: IEC (Prague) 1981 Type II CrO

Time Constant: 3180us + 70us

Recorded 20dB below Nakamichi 400Hz Reference Level

Level fluctuation less than +/-0.2 dB measured. Typically +/-0.1 dB

Frequency fluctuation +/-0.01% measured

One tone recorded on each tape at the level corresponding to the Equalization curve

Duration of each Tape 10 min recorded at the BEGINNING of the Tape from 00 min 10 sec to 10min 10 sec

This Tape is equivalent to Nakamichi DA09001B Test Tapes

P.S. Good luck and please only bid if you are serious and going to pay in full within 3 working days

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