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ITC Delta SeriesDelta Series Cartridge Machines (ITC)


ITC's Delta series cartridge machines were designed to fit in 1/3 of the width of a rack to conserve valuable space.  This compact size also allows versatility without compromising operator convenience.  Front panel switches are simple and convenient for error-free operation.  Any Delta reproducer is converted easily to a recorder at any time by adding a Delta IV recording amplifier and a record head.

Delta series cartridge machines are available in a number of cost-effective and space-efficient configurations with the flexibility of mono or stereo reproduction and recording. The Delta series is flexible and versatile and can be made to suit specific requirements and application needs. 

Delta I Single Deck Reproducer
High-speed cue increases speed of operation 7-1/2 PS operation standard
Field convertible to 3.75 IPS or 15 IPS operation 
Designed for simplicity in operator use 
Add recording capability by combining with the Delta IV recording amplifier 
The industry standard in front-panel layout 

Delta IV Recording Amplifier
Converts Delta I reproducers and bottom deck of Delta III machines to recorders 
All three NAB cue tones standard
1/3 rack width 
Designed for simplicity in operator use 

Delta IV is a stand-alone single-deck reproducer for size A and AA cartridges. High-speed re-cue and all NAB cue tones are standard. A Delta IV recording amplifier may be added to provide complete recording capabilities. 

Delta I Reproducer Features
Efficient toroidal power transformer
Stable micro-adjust headblock assembly with adjustable long life stainless steel tape guides 
Long-life switches with easily replaceable lamps 
Crystal referenced brushless DC servo motor for low flutter and precise speed control
Repeat/play lock-out prevents cart from being played twice in a row. This feature can be disabled. 
Flashing "cart played" indicator 
High-speed re-cue, 22.5 IPS for convenience 
Scuff- and scratch-resistant polycarbonate front panel 
Transformerless output configuration with XLR connectors standard for performance
Plug-in PC cards with socketed ICs and gold flash edge connectors 
Automatic auxiliary start pulse for clock reset, standard on all Delta reproducers 
Audio mutes on detection of end-of-message cue tone 
High-slew rate and low-noise 5500 series audio amplifiers (5532, 5534 AN) for clean audio 
Modular motherboard and daughter board construction with plug-in PC cards 1/2-inch thick anodized tool plate aluminum desk resists wear and is warp resistant 
Compact size, 1/3-rack width conserves space in today's tighter installations 

Powerful Air Damped Solenoid
Powerful air-damped solenoid with adjustable linkage allows repeatable and accurate long-term pressure roller adjustments.  Solenoid control is accomplished by a dedicated power supply.  Neither heat nor line voltage fluctuations will change pressure roller pressure, virtually eliminating skew-induced audio phase error.  

Precision Micro-Adjustable Head Block
This precision micro-adjustable head block module is designed to provide accurate and repeatable height, zenith, and critical azimuth alignment.  Cross-linked azimuth arms inside the block allow fine precision adjustments. Independent set screws have lock units to assure long term stability.  Heads are specially designed for very flat frequency response and long life. 

Interchangeable Printed Circuit Boards
Reproduce amplifiers and cue detectors are all on a single board. The reproduce amplifier cue detector board may be exchanged between single or triple decks. The reproduce logic also is interchangeable between single and triple decks. 

Microprocessor Circuits
Microprocessor circuits make Delta machines more reliable, serviceable, compact and efficient. Microprocessors allow inclusion of many features not practical in discrete component designs. Troubleshooting is easy because searching for an individual component is eliminated. 

Microprocessor Logic
Microprocessor logic in Delta machines monitors all front-panel switches, controls motor speed, operates all lamps and makes all operating decisions for the machine. Microprocessors eliminate virtually all troublesome relays and discrete components of other designs. 

Cue Detection
Cue detection in Delta machines is done by digital microprocessor logic.  Digital cue tone detection eliminates adjustment of components subject to drift or change, making operation more dependable and repeatable.

Delta IV Recording Amplifier Features
With the addition of a Delta IV recording amplifier, a Delta I reproducer or the bottom deck of a Delta III reproducer can be converted to a recorder.  

Group delay compensated, low-distortion recording amplifier 
Precision, crystal referenced bias and cue tones for no drift and low distortion
Front-panel meters with simulated "VU" ballistics and A scale. Meters automatically switch between record (input) and reproduce (output) 
Record set switch Secondary and tertiary cue tone record switches 
Front panel controls for 1 kHz cue tone add and defeat 
Independent front-panel input level controls. Knobs may be removed and holes capped to prevent level tampering 
Convenient meter selection switches allow front-panel selection of record, play cue or bias indications 
Record amplifier interconnect cables mate with rear panel connectors on Delta I or Delta III reproducers to provide power, logic and head lead interconnection. 

Delta Series Rear Panel 

Audio inputs are via rear panel XLR connectors. Units are shipped configured for 20K Ohm bridging, but may be field converted to 600 Ohm or 150 Ohm balanced, terminated. Input transformers are standard, while jumpers allow the use of true differential, transformerless input amplifiers 
Easily removable top cover 
Full remote control available through rear panel connector 
Delta IV recording amplifier interconnection socket 
International IEC type AC connector with removable cord and integral RFI filtering 
XLR audio connectors. Audio outputs are factory transformer coupled. May be field converted to balanced active transformerless by jumper changes. Audio output impedance selectable to operate into 600 or 150 Ohms

Delta Series Specifications

105 - 132 VAC or 210 - 264 VAC
50-60 Hz

Power Consumption
Delta I Reproducer 50 VA Typical; 65 VA Maximum
Delta III Reproducer 120 VA Typical; 135 VA Maximum 
*Delta IV Recorder/Reproducer 5 VA Typical; 10 VA Maximum

Tape Speed
7.5 IPS (19 cm/S) Standard
3.75 IPS (9.5 cm/S) Strappable Option
15 IPS (38 cm/S) Strappable Option

Speed Accuracy
Better Than 0.2% Record/Play Flutter
Play Maximum 0.12% Din Weighted @ 7.5 IPS
Record/Play Maximum 0.15% Din Weighted @ 7.5 IPS

Audio Output Configuration
Transformer Coupled Standard
Balanced Transformerless Operation Available Via Field Conversion

Audio Output Impedances
600 Ohm Standard Termination Impedance (275 Ohm Source Impedance)
150 Ohm Optional Termination Impedance Via Strap Change (50 Ohm Source Impedance)
Transformerless Output - 150 Ohm Source Impedance

Audio Output Level
+ 18 dBm Before Clipping into 600 Ohm Load
+ 22 dBm Transformerless Clip Level
Variable from 0 Level to +18 dBm (Referenced to 1 kHz at 160 nWb/m)
Continuously Variable "Useable" Range of -18 dBm to +18 dBm

System 1.5% or Less Thd. (Tape Dependent)

Signal-to-Noise - No Tape Running; Scotchcart Broadcast Cartridge in Place Mono 62 dB (or Better); Stereo 60 dB (or Better)
Signal-to-Noise - Measured with Bias/No Signal; Input Shorted; Virgin Cartridge Mono 60 dB (or Better); Stereo 58 dB (or Better)
Squelch Noise -70 dB or Better
Noise Measurements Are 20 Hz - 20 kHz Bandlimited, Unweighted

Crosstalk (System)*
-50 dB Minimum Separation between Any Two Channels

Frequency Response
Record Playback 2.0 dB, 50 Hz - 16 kHz

1975 NAB Factory Standard
1964 NAB Field Convertible Via Jumper
CCIR Field Convertible
Adjustments High Frequency Via Potentiometer

Cue Signals (Conform to NAB Specification)
NAB Primary Cue 1 kHz
NAB Secondary Cue 150 Hz
NAB Tertiary Cue 8 kHz

External Cue
Cue Record Logging Input-Source Impedance - 10 K Ohms or Less Volts in 0.5 V .25 V rms
Cue Reproduce Audio Output-Load Impedance - 47 K Ohms or Greater Volts Out 0.5 V .25 V rms

Audio Input Sensitivity
Line Input 0 dBm Nominal
Input Range -18 dbm to +18 dBm (Strappable for -6 dBm or + 6 dBm Center Range)

Audio Input Configuration
Transformer Coupled 20 K Ohm Bridging Standard; Strappable for 150/600 Ohms Terminating Impedance
Transformerless Balanced Available

Monitors Input Level to the Recorder; Automatically Switches to Playback When Not Recording; Manually Switchable for Record/Play/Bias/Cue
Taut Band Movement with VU Type "A" Scale

119.3 kHz, Crystal Referenced

Cartridge Size
Delta I and Delta III Reproducers - NAB A and AA

Ambient Operating Temperature Range
10 to 50C (50 to 122F)

Tabletop Standard
Rack-Mount Optional with URM-0001 Rack Mount Kit (Three Units May Mount Side by Side)

Delta I Reproducer 14.1 cm (5-9/16 inches)
Delta III Reproducer 14.1 cm (5-9/16 inches)
Delta IV Recording Amplifier 14.1 cm (5-9/16 inches)
Delta I Reproducer 30.5 cm (12.00 inches)
Delta III Reproducer 33 cm (13.00 inches)
Delta IV Recording Amplifier 30.5 cm (12.00 inches)
Delta I Reproducer 13.3 cm (5-7/32 inches)
Delta III Reproducer 26.6 cm (10-15/32 inches)
Delta IV Recording Amplifier 13.3 cm (5-7/32 inches)
Add 1 cm (.375 inch) for Feet
Note: All Machines Require 8.75 cm (3-1/2 inches) Additional Depth at Rear for Interconnection.

Weight (Typical)
Delta I Reproducer 10.0 Kg (22 lbs.)
Delta III Reproducer 16.8 Kg (37 lbs.)
Delta IV Recording Amplifier 5.9 Kg (13 lbs.)
Total Shipping Weight Less Than 22.7 Kg (50 lbs.) Maximum

* Specified Using a Scotchcart II Broadcast Cartridge at a Reference Level of 1 kHz at 250 nWb/m.

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This page last updated 7/31/2007