Looked up the 121-687 and NTE/ECG is currently crossing this to the 107 . But watch the basing ! The tech manual for this radio shows the emitter and base REVERSED! on the (2) 687's in the FM tuner ... Nor does the 107 include the "shield" pin .

The 316 IS a four lead device, BUT! Be very careful of the basing!

The 121-692 is shown for the three units in the WB
front end. This one crosses to the 161, which has the
same pinout as the 316 . However, the 692's pinout is
"normal" ... you won't have to twist the leads around
on the replacement to have it match up with the socket.

I suppose one could _alternately_ rewire the two sockets on the FM tuner and use either the 161 or 316.

I used a plain old 2n2222 for the FM RF amp, and it's
playing just fine...

jeff_nospam_picks@hotmail.com ( remove _nospam_ )
:Hi Rick
:
: In some ways transistors are easier the replace than tubes. Most only have 3 leads.
:
: ECG cross reference for 121-687 is #316. Most electronic stores will know this number. It's listed as a high frequency, silicon, NPN transistor.
:
:Norm
:
:
::tubes I can find....
::
::BUT what about the pesty Z7000 series transistors
::part number 121-687
::
::I could use 3...
::
::who stocks and sells those? and the others?
::
::Nick
::Plano, TX
::