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ITC Series 2ITC Series 2  Audio Cartridge Machines 


ITC's Series 2 Audio Tape Cartridge machines configured as recorders or reproducers were available in stereo or mono versions.

Standard features included:
Three Cue Tones
High-Speed Re-cue
Audio Mute at EOM
1 kHz Primary Cue Tone Delete for Looping
Dynamic Braking
Replay Lock-Out
Digital Tape Timer
Active Balanced Inputs and Outputs with XLR-type connectors.

Recorders included Dolby HX Pro™ Headroom Extension and high-resolution LED bargraph metering which was selectable for VU or peak ballistics and monitoring of play, record, cue or bias signals.  The motor is selectable for command or continuous run at a standard speed of 7.5 IPS (19 cm/s) or optionally at 3.75 IPS (9.5 cm/s) or 15 lPS (38 cm/s).

ITC's Series 2 cart machines are designed specifically for low internal operating temperature and are housed in a one-piece, unventilated outer case to prevent contamination from dust, dirt, liquid spills or other foreign matter which commonly decrease the efficiency and life expectancy of similar units. The motor is a DC, crystal referenced unit with PLL servo control.  A unique cam latching solenoid mechanism with Teflon-coated plunger ensures constant and positive pressure roller contact.  The robust tape transport system is based on a precision-machined, nickel-plated cast aluminum deck and features Kevlar™ tape guides and an improved cartridge hold-down mechanism.

The legendary dependability of these products is enhanced in Series 2 by the extensive use of microprocessor logic and surface-mount devices. These components, widely used in the majority of modem high-technology products, have been proven to significantly increase reliability and functionality while reducing equipment cost.

ITC's Series 2 provides reliable and continuous service, while requiring only a minimum of maintenance and alignment. When maintenance is required, the entire internal chassis slides out of the outer case, providing easy access to heads, pressure roller, motor, power supply and all internal printed circuit assemblies. The cleaning mode allows the pressure roller to conveniently be brought into operating position. Micro-adjust head blocks are referenced to the deck plate and have independently locking set screws for long-term stability.

All audio alignment settings are adjusted accurately via multi-turn potentiometers. The use of Dolby HX Pro™ ensures maximum recording quality and elimination of the self-bias/self-erasure effect sometimes exhibited during analog tape recording processes.  The motherboard concept of construction facilitates simple PC board removal and exchange, and a universal extender board is available for use with all Series 2 circuit boards.

ITC's Series 2 operates on all standard international mains voltages, from 105 VAC/60 Hz to 264 VAC/50 Hz.  The lEC standard mains receptacle meets all applicable international electrical safety standards.  An optional universal rack mount permits three Series 2 units to be mounted horizontally in a standard 19-inch equipment rack.

Series 2 Features
Premium Quality XLR-Type Audio Input and Output Connectors
Auto-ranging Power Supply with Universal Mains Receptacle
On/Off Switch, Removable Fuse Case
Earth Lug
Playback and Record Remote Connectors
3-Cue Tones
Microprocessor Logic
Replay Lockout
Primary Cue Tone Defeat/Looping
VU/PPM Metering
Dolby HX Pro™ Headroom Extension
Familiar, Easy to Operate Controls
Digital Tape Timer

Audio Electronics Specifications

Active Balanced
Impedance – >10K Ohms Bridging Standard. Adjustable for 600 Ohm Termination
Input Level – Variable from -20 to +18 dBm

Active Balanced
Impedance – <50 Ohms
Output Level  – +18 dBm Maximum, Variable from -18 to +18 dBm

1975 NAB or 1981 IEC Standard
Signal-to-Noise Ratio (Ref. 20 Hz - 20 kHz), Bias/No Signal – >55 dB* with virgin DRS Cart 2 Loaded, No Tape Running – >60 dB*
DRS Cart 2 Loaded, Mute – >74 dB

System Distortion
<1.0% THD @ 1 kHz
<0.5% Third Harmonic

Amplifier Distortion
<0.1% THD @ 0 dBm
<0.2%THD @ +l8dBm (TotaI Output Distortion May Be Greater, Dependent on Cart/Tape Used)

>50 dB PGM to PGM
>50 dB CUE to PGM

Frequency Response
± 2 dB from 31.5 Hz to 16 kHz

Cue Tones
NAB Primary 1 kHz
NAB Secondary 150 Hz
NAB Tertiary 8 kHz
Logging/FSK – None Internal to Machine

Cue Input
Impedance – > 10K Ohms, Unbalanced
Level – 0.5 Vrms Nom. 125 Hz to 10 kHz

Cue Output
Impedance – 4,700 Ohm Source
0.5 ± .25 Vrms
125 Hz to 10 kHz
Cue Bias Enable

LED – 12 Segment (+9,6,3,2,1,0, - 1,3,5,7,10 & 20 dB)
Switchable Mode – Fast Response VU or Quasi-Peak
Selectable in Either Mode for
PGM Play (Auto-Switched in RUN)
PGM Record
PGM Bias
CUE Play/CUE Bias

* Referenced to 1 kHz @ 250 nWblm record level, stereo system

Tape Transport Specifications

Cartridge Type
NAB Type A or AA

Start Time
100 msec. Min., Adjustable

Stop Time
100 msec Max. (from 7.5 IPS)

Tape Speed
Record/Reproduce – 7.5 IPS (19 cm/s) Standard,3.75 IPS (9.5 cm/s) or 15 IPS (38 cm/s) Selectable
Fast Forward – 22.5 IPS (57 cm/s), Defeated When Set for 15 IPS;11.25 IPS (28.6 cm/s) When Set for 3.75 IPS

Tape Speed Accuracy
< 0.2%

Head Configuration

Capstan Motor
Brushless PLL DC Servo, Crystal-Referenced

Wow and Flutter
Reproducer – < 0.09% Maximum
Recorder – <0.12% Maximum (DIN Referenced @ 7.5 IPS (19 cm/s)

Physical Specifications

Power Requirements
105 VAC/60 Hz to 264 VAC/5O Hz

Ambient Environment
50° to 122° F, 10° to 50° C

Tabletop or Optional 19-inch Rack

5-7/32 H x 5-9/16 W x 16 D (inches); 13.256 H x 14.127 W x 40.64 D (cm)

Reproducer – 20 lbs. (7.46 kg)
Recorder – 24 lbs. (8.95 kg)

Dolby HX Pro™ Headroom Extension was originated by Bang & Olufsen and was manufactured under license from Dolby Laboratories Licensing Corporation.

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This page last updated 7/31/2007