What common emiiter amplifier impedance?

jiripolivka said:

If you really want to "amplify" the Tesla-coil output, be aware that no transistor can survive the voltage peaks reaching several kV. Even using special HV vacuum tubes is doubtful.
Tesla coil is a pulse transformer, so increasing its output voltage is easy by adding secondary turns. Also tuning it to resonance will help.
BTW,typical RF transistor amplifier has an input impedance typically 20-50 Ohms, and e-b breakdown voltage is 6 to 50 V in reverse

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boylesg said:

You misunderstand. The purpose of the antenna and transistor is to produce a signal from the RF that is used to keep the tesla coil in tune while it is running. The only reason why the transistor would conduct HV is if there was a strike to the antenna which I would want to avoid.

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jiripolivka said:

Then I do not see any purpose in using a transistor amplifier close to the Tesla coil. To indicate resonance one only needs a small one-turn pickup coil with a diode detector, located to get a suitable DC output that will peak at resonance.

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