Hi Ken,

It depends on the TV but all this has been 20+ years ago. In those days I
found a few transistors that made great shortwave amps. I believe their
part numbers pretty much all started with BU. When one type fell out of
favor with the TV manufacturers they showed up on markets by the carton.
Usually at dump shops or discounters.

The other types that worked even better were the video transistors that
drove the CRT. You had to secure a cheap source, no scavenging out of TVs
because each set only had three. But they were low power so that required
a soldering marathon and it only made sense when you could buy them a dime
a dozen. We used to do some crazy things such as running them oil cooled
because these weren't easy to mount on a heat sink.

Except for the CRT drivers the data sheets mostly didn't spec FT, just
switching times. But that used to be the same with small signal types such
as the BSS123 that I have used heavily in front ends.

Regards, Joerg
http://www.analogconsultants.com