Stephan
Attached GIF file is the schematic for a common base amplifier with
about 12dB of gain into a 50 ohm load.
The amplifier will not saturate even if the load is open circuited.
Q102 temperature compensates Q103 which regulates the dc collector
current of the common base transistor.
Other transistor types with equivalent performance may be susbstituted.
The RF transformers are coupled to the amplifier with series capacitors
to avoid saturating the cores with dc current.
Bruce
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