The usage of word "pill" is a "slang" word for RF transistors (bi-polar or
MOSFET) originated in US by non-technical radio operators.

Popular MRF/SRF RF transistors
http://www.rfparts.com/mototran.html

The 211 case style was very popular for bi-polar devices
http://www.rfparts.com/trancase.html

If you are aware of the voltage required (12/13.8; 24/28 or 48/50 VDC),that
would be useful in reducing your search candidates. Specifications:
http://www.rfparts.com/transistorspecs.html

You can inquire with RF Parts if you desire a cross reference - for future
replacement.
http://www.rfparts.com/product.html

Handling RF Transistors
http://www.rfparts.com/install.html

w9gb



These are useful pointers.
I am in the same situation as the original poster.
I have been given a bunch of RF power transistors (316-01 and 244-04 type
packages). I have been unable to identify them. The giver tried to find the
information where he works (they were being thrown away) but he can't find any
information.

Transistor 1 markings: C / M2519 / 185 / 9014 / RR15
the bag is labelled RF 10W UHF

Transistor 2 markings: C / 185 / 4340P3 / 8817 / MALAYSIA
the bag is labelled RF 12W VHF

Transistor 3 markings: C / (Motorola Wing) / 8133P1 / 8919 / MALAYSIA
the bag is labelled RF PA 28W VHF

Transistor 4 markings: C / 4340P1 / 8824 M52 / (logo)
the bag is labelled RF 4W VHF
these have logos of ST or Thompson CSF

The second from last line four digit number is the date code. In some cases
there are more than one transistor and this line does vary.

I Have tried adding MRF, 2SC, SRF in front of the ID and then I have done a
google, but this has found nothing.

Any ideas?

--Gary