The Sencore TF46 Portable Super Cricket Transistor/FET Tester manual provides detailed instructions on setup, operation, and troubleshooting, including battery installation, lead connections, and various test procedures for both in-circuit and out-of-circuit testing. It also covers safety precautions, maintenance tips, and features like the Auto-Off circuit and the Sencore patented Cricket Gain test for evaluating transistor gain and leakage.
Manual Overview
The Sencore TF46 Portable Super Cricket Transistor/FET Tester is designed for efficient troubleshooting of solid-state circuits. It offers both in-circuit and out-of-circuit testing capabilities, featuring the patented Cricket Gain test for Good/Bad transistor gain assessment without requiring basing information. The tester also provides a Super Cricket Parameter Test for detailed engineering parameter evaluation, crucial for matched push-pull circuits and critical gain circuits. The TF46 tests all six transistor leakage paths to identify transistors that may be failing, and includes a special Ipss leakage test for FET grading. Calibration and adjustments are facilitated by the permutator test switch, which rotates through all possible basing combinations. The tester’s dynamic beta and mutual conductance tests operate at a frequency of 2 kHz, with specific voltage and current parameters detailed in the manual. For maintenance, the manual advises checking for broken test leads and provides guidance on disassembly and calibration. An Auto-Off feature conserves battery life by automatically powering down the device when not in use.
Quick Issues Covered
- Diagnose transistor gain issues with in/out-circuit tests.
- Identify transistor leakage using six-path leakage tests.
- Trace circuits using detailed schematics for troubleshooting.
Overview
The TF46 Portable Super Cricket is a transistor and FET tester designed for both in-circuit and out-of-circuit testing. It features the Sencore patented Cricket Gain test for Good/Bad transistor gain evaluation without needing basing information, and the Super Cricket Parameter Test for detailed engineering parameter analysis. The device tests all six transistor leakage paths and includes a special Ipss leakage test for FETs. It also provides basing information for unknown transistors and features an Auto-Off circuit to conserve battery life.
Specifications
- Cricket Good/Bad Gain Test:
- Test Method: Detects ability of transistor to invert a square wave (Sencore patent 3,898,559)
- Test Frequency: 2 kHz
- Test Voltage: Vcr = +4.0 VDC
- VBE = 7 VPP on zero reference
- Test Currents: Ig = 12 mA maximum
- 2-3 mA average continuous
- Ip = 7 mA maximum
- 3 mA average continuous
- Bi-Polar Transistor Beta Test:
- Test Method: Dynamic Beta
- Test Frequency: 2 kHz
- Test Voltage: Vcr = +4.0 VDC
- VBE = 7 VPP on zero reference
- Test Currents: Ic — (Sig Trans) 25 mA maximum
- Ic — (Output Trans) 150 mA maximum
- Ip — (Sig Trans) 50 uA maximum
- Ip — (Output Trans) 300 uA maximum
- Beta Range: 0-500
- Bi-Polar Leakage Tests:
- Test Method: Key test measures reverse collector-base leakage (IcBo). All other paths tested with rotation of permutator test switch (IEBO, IBEO, IcEo, IEco, IBco).
- Test Levels: Vop = £38.5 VDC (emitter open)
- Leakage Range: 0-2500 microamps
- Field Effect Transistor Gm Test:
- Test Method: Dynamic mutual conductance
- Test Frequency: 2 kHz
- Test Voltage: Vps = +4.0 VDC
- Vag = 0 Volts
- Signal Level: .4 VPP
- Gm Range: 0-25,000 micromho
Controls & Indicators
Refer to the PDF for details.
Installation / Setup
Refer to the PDF for details.
Operation
Refer to the PDF for details.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
There is always a danger present when testing electronic equipment. Unexpected high voltages can be present at unusual locations in defective equipment. Every precaution has been taken in the design of your instrument to ensure that it is as safe as possible. However, safe operation depends on you, the operator. Become familiar with the equipment you are working with, and observe the following safety precautions:
1. Never exceed the limits of this instrument as given in the specifications section and the additional special warnings in this manual.
2. A severe shock hazard can result if the chassis of the equipment being serviced is tied to the “hot” side of the AC line. An isolation transformer should always be used with hot-chassis equipment. Also, be sure that the top of your workbench and the floor underneath it are dry and made of non-conductive materials.
3. Remove the circuit power before making connections to high voltage points. If this cannot be done, be sure to avoid contact with other equipment or metal objects. Place one hand in your pocket and stand on an insulated floor to reduce the possibility of shock.
4. Discharge filter capacitors (after removing power) before connecting to any part of the circuit requiring power to be removed.
5. Be sure your equipment is in good order. Broken or frayed test leads can be extremely dangerous and can expose you to dangerous voltages.
6. Remove the test lead immediately after the test has been completed to reduce the possibility of shock.
7. Do not work alone when working on hazardous circuits. Always have another person close by in case of an accident. Remember, even a minor shock can be the cause of a more serious accident, such as falling against the equipment, or coming in contact with high voltages.
8. Improper Fuse(s) Void Warranty. Fuses are for your protection, so always replace fuse with proper type and current rating. The proper fuse type description is marked near the fuse holder and in the manual. Always:
A. Be sure you are replacing the right fuse. On units with more than one fuse, be sure you are placing the proper fuse value in the fuse holder.
B. Have the proper size replacement fuse in stock. With each new instrument, be sure to update your fuse inventory with any special value fuses your instrument may require.
9. Explanation of symbols.
A. This marking indicates that the operator must refer to an explanation in the operating instructions.
B. A terminal at which a voltage with respect to another terminal or part exists or may be adjusted to 1,000 volts or more.
Download MANUAL Operation manual (PDF – 11.0 MB)
Operation manual for Sencore TF46 Portable Super Cricket Tester: troubleshoot, calibrate, and maintain transistor and FET devices. PDF 11.0 MB.
- Brand: Sencore-tf46-portable-super-cricket-transistor-fet-tester-operation-maintenance
- Model: MANUAL
- Type: Operation manual
- File size: 11.0 MB
Overview
Brief overview of the product.
Specifications
- Key spec 1
- Key spec 2
Controls & Indicators
Control panel/button layout.
Installation / Setup
- Step 1…
- Step 2…
Operation
Basic usage, modes, cycles.
Troubleshooting & Error Codes
| Issue / Code | Fix |
|---|---|
| Example | How to fix… |
Safety & Warnings
- Important warning…
Downloads
Download MANUAL operation manual (PDF)
Sencore TF46 Portable Super Cricket Transistor FET Tester Overview
The Sencore TF46 Portable Super Cricket is a versatile transistor and FET tester designed for quick and accurate identification and analysis of semiconductor components. This handheld device allows technicians and electronics enthusiasts to measure transistor gain, check for shorts or opens, and identify transistor types with ease. Its portability and user-friendly interface make it ideal for field service, repair work, and educational purposes.
Main Features and Specifications
- Tests Bipolar Junction Transistors (BJTs) and Field Effect Transistors (FETs)
- Measures transistor gain (hFE) and leakage currents
- Identifies transistor type and pin configuration automatically
- Compact and lightweight portable design for field use
- Battery-operated with low power consumption
- Clear analog meter display for easy readings
- Durable construction suitable for workshop and outdoor environments
Basic Usage and Operation Tips
To use the Sencore TF46, first ensure the device has fresh batteries installed. Connect the transistor or FET leads to the appropriate test sockets as indicated on the tester. Power on the unit and observe the meter reading to determine the transistor’s gain and condition. For best results, make sure the component leads are clean and properly inserted. Refer to the included chart for interpreting meter readings and identifying transistor types.
Troubleshooting and Maintenance
If the tester fails to provide consistent readings, check the battery voltage and replace batteries if necessary. Clean the test sockets regularly to maintain good electrical contact. Avoid exposing the device to moisture or extreme temperatures. If the analog meter needle sticks or behaves erratically, gently tap the meter or consult a qualified technician for calibration or repair.
Safety Reminder
Always disconnect the transistor or FET from any circuit before testing to prevent damage to the tester or the component. Handle the device with care and avoid contact with high voltage circuits. Follow all standard electronic safety precautions to ensure safe operation.