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Anyone have a schematic or design for wideband RF amp?
Not high power, looking for receive boost across TV band.
MPF102, BF998, and such. Fet, bipolar, whatever.
I have a few ideas, and have looked at some components. I'm looking for suggestions, I of course have not thought of every possibility.
It would be for 75 ohm impedance. Lowest noise is best naturally. 15 to 20dB gain.
I want something relatively flat, low noise, without paying $200 like high quality industrial items. I know very well I can make one for a whole bunch less.
3 Answers
- tlbs101Lv 71 decade agoFavorite Answer
Go to http://www.minicircuits.com/
They have wideband RF amps for less than US$2.00. Add a 12V power supply, bias resistor, a couple of surface mount capacitors, and you have yourself an amp, for very cheap.
I have used this one in the past. They are simple to use and work great:
http://www.minicircuits.com/pdfs/ERA-5+.pdf
I have also used the ERA-6 and the ERA-3.
.
- Robert_WLv 51 decade ago
You might consider specifying a noise figure and how broad band VHF & UHF? And watch the input impedance.
