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JB 150 Kian keying relay
- Thread starter 552fl
- Start date
BJ radionut
Supporting Member and 6m addict
The current flow is backwards. This is overly simplistic, One would be for a Positive ground car and the other for a Negative ground.
https://learn.sparkfun.com/tutorials/transistors/all
https://learn.sparkfun.com/tutorials/transistors/all
Last edited:
BJ radionut
Supporting Member and 6m addict
2n2222 are still very common and cheap! However, if you sub it for something else make sure the current rating is higher.
If memory serves me the 2n2222 has a switching current rating of 600 milliamps.
http://web.mit.edu/6.101/www/reference/2N2222A.pdf
http://pmsciart.com/wp-content/uploads/2015/09/Screen-Shot-2015-09-11-at-4.05.35-PM.png
PS: If yours has an electrolytic cap across the coil of the relay. I would change that as well.
I just looked at the diagram. Check those diodes also, one rectifies the 12vac to DC the other rectifies the input to the transistor. My 2 cents, remember that amp is 40+ years old.
If memory serves me the 2n2222 has a switching current rating of 600 milliamps.
http://web.mit.edu/6.101/www/reference/2N2222A.pdf
http://pmsciart.com/wp-content/uploads/2015/09/Screen-Shot-2015-09-11-at-4.05.35-PM.png
PS: If yours has an electrolytic cap across the coil of the relay. I would change that as well.
I just looked at the diagram. Check those diodes also, one rectifies the 12vac to DC the other rectifies the input to the transistor. My 2 cents, remember that amp is 40+ years old.