Hello

I found a modulator from an old analog sat receiver, it work between channel 30 to 42 (550 - 650MHz), so how can I build an amplifier stage with one or two transistor (common transistor not the RF transistor so difficult to found).

thnks

 

nobody can help me ? I just need to amplify the very low output to 100 or 200mW with minimum of other frequency perturabtions or atenuation of video quality pics

 

Hello,

Common audio transistors will not at those high frequencies.
Better look for a transistor called BFW16. (see attached datasheet)

Bertus

 

it's possible to use the test circuit in the datasheet ?
My video modulator has an output power of - 60 to - 40 dbm