The Sencore TF46 Portable Super Cricket Transistor/FET Tester manual provides detailed instructions for 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 specific tests such as the Cricket Gain test, leakage tests, and parameter tests to ensure efficient troubleshooting of solid-state circuits.
Manual Overview
The Sencore TF46 Portable Super Cricket Transistor/FET Tester is designed for efficient troubleshooting of solid-state circuits, offering both in-circuit and out-of-circuit testing capabilities. The device features the patented Cricket Gain test for Good/Bad assessment of transistor gain without needing basing information, using a Permutator test switch to cover all possible combinations. It also provides a Super Cricket Parameter Test for detailed engineering parameters, crucial for matched push-pull circuits and critical gain circuits. The TF46 tests all six transistor leakage paths and includes a special IpsS leakage test for FET grading. Calibration is essential for maintaining accuracy, and the manual provides guidance on this process. The tester includes an Auto-Off circuit to conserve battery life. Troubleshooting is facilitated by the ability to determine unknown transistor basing, aiding in selecting replacements when cross-reference data is unavailable. The manual emphasizes safety precautions, such as using an isolation transformer with hot-chassis equipment and ensuring test leads are in good condition to prevent shock hazards.
Quick Issues Covered
- Diagnoses transistor gain issues with Cricket Gain test.
- Calibrates using zero reference voltage for accurate measurements.
- Includes schematics for effective circuit tracing and 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 testing of transistor gain without requiring basing information. The device also includes a Super Cricket Parameter Test for determining transistor engineering parameters, tests for all six transistor leakage paths, and a special leakage test for FETs. Additionally, it provides complete 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: Vor = +4.0 VDC, VpE = 7 VPP on zero reference
- Test Currents: I¢ = 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: Iq — (Sig Trans) 25 mA maximum, Ic – (Output Trans) 150 mA maximum, Ip — (Sig Trans) 50 uA maximum, Ip — (Output Trans) 300 vA 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: Vor = +3.5 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
- FET Leakage Test (IGss):
- Voltage Level: +3.5 VDC (source open)
- Leakage Range: 0-2500 microamps
- Zero Bias Drain Current Test (Ipss):
- Voltage Level: Vps= +4.0 VDC, Ves @0
- Ipss RANGE: 0-50 milliamps
- General:
- Test Leads: Connected, terminated in color-coded E-Z Hook® connectors
- Batteries: Six alkaline, carbon zinc, or rechargeable “AA
- Power Consumption: 11 mA, current at idle, 120 mA maximum
- Meter: 4*/", 100 uA, 5%, mechanical shock protected
- Size: 10” x 54/2”
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:
This marking indicates that the operator must refer to an explanation in the operating instructions.
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 2 Operation manual (PDF – 4.1 MB)
Operation manual for Sencore TF46 Model 2. Guides technicians in testing, troubleshooting, and maintaining transistors and FETs. PDF size: 4.1 MB.
- Brand: Sencore-tf46-portable-super-cricket-transistor-fet-tester-operation-maintenance-manual
- Model: 2
- Type: Operation manual
- File size: 4.1 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 2 operation manual (PDF)
Sencore TF46 Portable Super Cricket Transistor FET Tester Overview
The Sencore TF46 Portable Super Cricket Transistor FET Tester is a compact and reliable handheld device designed to test and analyze transistors and field-effect transistors (FETs). Ideal for technicians and electronics enthusiasts, this tester quickly identifies transistor types, checks their gain, and verifies proper functionality, helping to streamline troubleshooting and repair of electronic circuits.
Main Features and Specifications
- Portable and lightweight design for easy field use
- Tests bipolar junction transistors (BJTs) and field-effect transistors (FETs)
- Measures transistor gain (hFE) accurately
- Identifies transistor pin configuration automatically
- Large, easy-to-read analog meter display
- Battery-operated for convenient cordless operation
- Durable construction suitable for workshop and field environments
Basic Usage and Operation Tips
To operate the TF46 tester, first ensure the device has fresh batteries installed. Insert the transistor into the designated test socket according to the device’s pin layout guide. Power on the unit and observe the analog meter to determine the transistor’s gain and condition. The tester will indicate whether the transistor is good, weak, or faulty. For accurate readings, make sure the transistor leads are clean and properly seated. Avoid touching the transistor leads during testing to prevent interference.
Troubleshooting and Maintenance Notes
If the tester does not power on, check and replace the batteries as needed. Clean the test sockets periodically to maintain good electrical contact. If readings appear inconsistent, verify the transistor is correctly inserted and that the leads are not damaged. Store the tester in a dry, dust-free environment to prolong its lifespan. For calibration or repair, consult the official Sencore service guidelines.
Safety Reminder
Always disconnect power from the circuit under test before using the transistor tester to avoid electric shock or damage to the device. Handle transistors and electronic components with care to prevent static discharge damage. Use the tester only as directed in the manual to ensure safe and effective operation.