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    JFET Mic Pre Advise Please

    The overload characteristics are exactly why I want jfet, I can design an opamp preamp quite easily and don't want to go down this road again as I already own some very low noise opamp pre's, some based on the ina217 which I built recently, these are very very good but opamp designs from a...
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    JFET Mic Pre Advise Please

    Firstly thanks for the responses guys, Audioguru: "Why use Jfets? Why not use an audio opamp instead?" i am looking to avoid opamp designs for personal reasons, I hate the fact the signal goes through so many stages, i love the sound of jfets and their gracefull distortion/overload...
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    JFET Mic Pre Advise Please

    Hey, I have been slowly teaching myself audio electronics over the past few years (part time). My knowledge is somewhat lacking to say the least, so please excuse this. I am trying to design a simple twin stage JFET mic preamp with components I have laying around, I have plenty of these (100 x...
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    gating rf frequencies

    quote: The signal being switched should always have a voltage within the supply voltage range ---- Ok so maybe i should look at a solid state relay instead? the function generator output signal is sine and varies from -1v to +1v at 3-5mHz and i need to gate this signal at 25% duty (on) 75% off...
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    gating rf frequencies

    hi, thanks for responses, i have been looking at the 74hc4006 since your reply, not sure if response time is fast enough yet untill i study data sheet in a bit more detail but it surely appears to have the bandwidth for my application, thanks. am i correct in assuming that in order to use...
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    gating rf frequencies

    hi, i am fairly new to all this so please excuse my lack of tecnical knowledge.... I am trying to design a device to gate the output of a function generator. The generator output is sine at 2vpp ac and needs to be varied between 3 and 5Mhz. I have designed the 555 timer at the values: 1330hz...
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    ultrasonic transducer 1 - 3mhz source

    hi, i am building a project and i need to source a ultrasonic transducer that can output frequencies over a bandwitdth of 1 to 3mhz minimum without significant frequency attenuation. The only thing i can find online is research papers to Lead Zirconate Titanate Thick-Film Ultrasonic...
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