B&t Tracer unit, xenon flash not working.

[GPG]

And discharge the flash cap

 

[Andyuk]

I've just proved the SCR by soldering a wire where the middle pin was and tapping the other end on the trigger transformer and hey presto it fires.

Thanks for your help with that.

 

[Andyuk]

will this do it.

I can only get the MCR100-6g

 

[GPG]

https://www.onsemi.com/pub/Collateral/MCR100-D.PDF
Seems OK Different package though

 

[GPG]

http://www.littelfuse.com/~/media/e...ittelfuse_thyristor_sxx8xsx_datasheet.pdf.pdf
The tab will help with dissipation should you need to trigger often

 

[Andyuk]

which of these three.

 

[GPG]

Links to data?

 

[GPG]

Got a schematic of your interruptor/trigger circuit? This determines the current available to trigger the SCR. The original SCR is ~50μA