Re: Favourite Test Equipment

On Fri, 5 Apr 2024 09:24:53 +0100, liz@poppyrecords.invalid.invalid
(Liz Tuddenham) wrote:

Jan Panteltje <alien@comet.invalid> wrote:
>

Giggle Hertz oscillations are not happening in LC circuits of specific
kind where those can happen you can figure from the parts used, no giggle
Hz in a BC109.

>
Back in the 1970s I found that a BC109 could be used as a self-
oscillating transmitter output stage at 100 Mc/s on a 1.5v supply (it
was for small animal cardiography).  Most "R.F." transistors wouldn't
work under those circumstances.

We used to make bugging devices using '109s with button cap
microphones that worked on that VHF broadcast band. They were highly
effective as I recall.