This circuit is from a 1965 Radio Electronics. The triggering transformer generates high voltage pulses. The generated light pulse depends on C1 and C2.
This circuit with RIAA equalization is from 1985 US documentation. The circuit has a flat response...
January 2017 - Mouser Electronics has announced the availability of Pulse Electronics' new...
This circuit was found in an American documentation from 1977. The mechanical resonator or ceramic...