Just got the package from the China Vendor. He had also wrote a long letter to me.
The thing is a modified Bosch 009 Distributor with 8 sets of new modified electronic ignition.
The new electronic ignition system is even bigger then the petronix ignitor.
The casing of the distributor needed to drill 2 holes to fasten the bigger electronics and heat sink.
Average Rating: 4.7 out of 5 based on 199 user reviews.
Additional mod to the tach:
1. Added ST L7812 voltage regulator to the circuit. Stabilize the input voltage to 12V
2. Added a 220uF cap on the regulator output.
3. Cleaned and assembled
Test will be carried out on weekend on my VWs.
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Found the circuit schematic from Internet. it is somehow different version as our tach. but the basic concept is the same:
- 7W Z1 Zener diode ouput 7.1 V … okay , working
- 3 transistors BSX68 … okay, de-soldered and checked
- 3 IN4148 diode, … okay, checked working
- 3 capacitors de-soldered.. checked okay, some leaking and weaken capacitance, but still working
Spare transistor parts: BSX68 is a 40 years old transistor. Common replacement is NPN 2n3904 that I have a few at home.
Average Rating: 4.4 out of 5 based on 262 user reviews.
This is the precise Signal Generator from my company Lab.
Technicians claimed it worth twenty thousand HKD back 10 yrs ago.
I tried 10v to 14v square wave, range 1khz to 10khz. No response. 🙁
Then tried to put a 3v DC across the pointer rotor motor. It turns. 🙂
Average Rating: 4.6 out of 5 based on 227 user reviews.
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Got another shipment from Element14 (Farnell). This IC will be put on the ignition sub circuit.
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Average Rating: 4.9 out of 5 based on 280 user reviews.