550 MHz, 34.5 dB gain push-pull amplifier with the following Features :

• Excellent linearity
• Extremely low noise
• Silicon nitride passivation
• Rugged construction
• Gold metallization ensures excellent reliability

Intended for CATV systems in the 40 to 550 MHz frequency range.

The circuit is intended to be used as a CATV amplifier. They are usually used in an 75 Ω system. We do not broadcast any television signal. Instead we roast atoms in a vacuum chamber. That's why we use a 50 Ω environment. When connecting anything 75 Ω to anything 50 Ω, a mismatch loss will occur. This reduces the performance of the amplifier. By using this nifty calculator, we can verify, that the mismatch loss is ≈ 0.177 dB - not be a big deal.

PARAMETER	VALUE MEASURED / APPLIED / GUESSED
Supply	24 Volts DC
Current	350 mA, small signal or no signal
Min. Freq.	40 MHz
Max. Freq.	550 MHz
Gain S21	35 dB, somewhere in band
Max. Power	> 30 dBm, measured @ 148 MHz
Input Match S11	10 dB (minimum)
Output Match S22	10 dB (minimum)

This is a very easygoing gain block. It survived many years, even tortured hard by our physics students. In case you need more output power, the supply mayst be increased. Please bear in mind, that cooling must be double checked in that case. And yes, read that datasheet and consult an engineer.

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