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LOPT / FBT Tester Page! K-7205 Kit
(Discontinued by Dick Smith Electronics of Australia in 2007)
Please note - this kit has been updated and released again by the designer - Bob Parker -
as the Blue Ringer!
Last update: . June 14, 2013
Big photo of the LOPT/FBT Tester!

The original (and the updated Blue Ringer) kit contained all required hardware and components. All you needed to provide wasthe battery, and you were in business.

Brief Specifications

Measurement range: 0 to 8+ 'rings' of inductor/transformer under test
Peak probe-tip voltage: 650mV
Update speed: 10 readings/second
Power supply: 6V DC (4 x 'AAA' cells) 9V battery works...
Controls: Push on/push off power switch
Dimensions: 2.7 x 5.2 x 2.2 inches (69 x 132 x 56mm)


* Can generally test LOPT/FlyBackTransformers in circuit, if no other components are faulty.
* Also useful for testing deflection yokes and switching power supply transformers.
* No fiddling with 'threshold' controls etc; readout is a clear 'bargraph' display.
* Kit assembly instructions and schematics (PDF) contains the complete text of the manual with information and hints for using the tester and diagnosing horizontal deflection faults.
(You will need Adobe Acrobat's free PDF reader to see this.)

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