RX - Preamp module 2N5109

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!Tunning * There is nothing to tune on RF side. It is wide band amplifier. * You only need to set right TRANSISTOR BIAS current and Gain. ** disconnect jumper JP1 ** connect mA meter there (200 mA scale is fine) ** connect supply voltage you want - from 12 to 14 V ** turn the resistor trimmer R4 (BIAS) and set bias current you want - it should be from 60 to 85 mA - depends on application ** than connect jumper short back again * With the resistor trimmer (ATT-TRIM) you can set amplifier gain as you need. ** from 0 to about 18 dB ** turn the ATT-TRIM (201)
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