[TenTec] Orion Question

[Lee A Crocker <lee_crocker@yahoo.com>]

Here are a couple of web sites with the relevent dope:

http://www.kpsec.freeuk.com/trancirc.htm

click the link called "and PNP"  

Also see:

http://www.rason.org/Projects/transwit/transwit.htm

With respect to using a relay, the answer is yes you
can use a relay.  The PNP transistor is simply a
substitute.  A relay cost several dollars a 2n2907
costs 50 cents.  

With resect to the emitter follower, this link is to
what I have always tought an NPN emitter follower is:

http://hyperphysics.phy-astr.gsu.edu/Hbase/electronic/transwitch.html#c5

click on the link "NPN Emitter Follower"

I don't see how grounding the base of this transistor
causes the transistor to conduct.  

73  W9OY

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