TheExperimenter wrote:
I desperately need these three items for a project, but I'm having a
hard time finding them. I had hoped to order all from a single source
to save shipping costs, but I don't know if that's feasible. A cross
reference with same pinouts might be helpful, but even having trouble
with that... and running short on time. Any parts source and/or good
cross reference would be welcomed. Thank you.

D40D5 NPN power tab transistor
2n2646 UJT
MCR 106-8 or C107D or 2n4444

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Go to http://www.nteinc.com/, search for your part numbers. Replacement
part numbers are all listed. Beside each replacement part number, click on
the "Check Stock" button under Distributor Inventory to find sources for the
parts. According to the web site listings, they are all available from NTE
Parts Direct. (1-866-285-3959).

Good luck with your project.
Dave M