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Remember to follow reddiquette when in doubt. Abusive comments will be subject to removal. We don't all have the same taste and we all don't have the same level of knowledge ( relevant XKCD). Ask about anything you like as a long as it's related to makeup. OP07 is always available in an 8 pin hermetically sealed dual in line IC packaging (DIP) or a TO-99. The IC offers low offset and long-term stability by means of a low-noise, choppersless, bipolar-input-transistor amplifier circuit. OP07 is an ultra low offset voltage operational amplifier. Skip the misleading ads, paid bloggers, sponsored Instagrammers and enjoy some real information from other redditors. OP07 Ultra Low Offset Voltage Op-Amp Datasheet. Makeup tips and advice from other people who have no agenda. Well for that type of circuit I never use a breadboard ! I am a Ham and know VHF issues. But it is very sensitive so who knows what it may detect? Again depending on your environment. The easiest way is getting the "AD8307 module" that Zim referenced. Depending on your electronic envirenment, FM-stations, TV-transmitters, cell towers etc, you may end up getting some strange readings. But - there are many knowledgable people on this board so I'd wait for more people to weigh in on this!Īs for a measuring antenna, a quarter wave whip is approximately 50cm long on 2m. I'd go with the broad band version to see what it can do. You already have a tuned circuit in there and if you add more, and add gain into the equation, there may be a risk of oscillations. That is a really good question! 144MHz is a high frequency and results may be unpredictable with regard to components and circuit layout if you don't have good measuring equipment. In that case, how to connect it to te preamp ? What is the best : to use the preamp like that as a wide band or to tune it also with a LC circuit.
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