No I do not have any power supply decoupling on the 24 volt line.

Perhaps I should have added that these are generally important, although it might not solve your problem.

 

Perhaps I should have added that these are generally important, although it might not solve your problem.

I will add these and test again.

Although, after I put in the 1N4001 diode in place of the 1N4148 the transistors were okay.

But i will still test with the caps.

Thank you Ron

 

I will add these and test again.

Although, after I put in the 1N4001 diode in place of the 1N4148 the transistors were okay.

But i will still test with the caps.

Thank you Ron

Well, that's pretty bizarre. 1N4148 is good for 200mA continuous current, and 100V reverse voltage. Where did you get them?

Maybe #12 was right.

 

Well, that's pretty bizarre. 1N4148 is good for 200mA continuous current, and 100V reverse voltage. Where did you get them?

Maybe #12 was right.

I purchased them from Future Electronics.

 

Here's a couple of links related to transient
suppresion from relay coils. Pretty basic but
may be helpful.

LINK 1

Link 2