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hi again, if I didn't use NP0 capacitors will that make a big difference do you think?
Ok, thanks very much!! :)
ah, ok, thanks!!! :) I will have a go and see how it goes, I plan to use it for tracking animals (for my post-grad. zoology course). If I can get it working I will then try to find a way to make the battery last longer. Thanks again!
Hi, I would like to make this but I can't understand the section about tuning. What is it that needs tuning, are some of the components adjustable with a screwdriver? They look too small. Or maybe I need to change some of the components to different values in order to tune this? Can I use an oscilloscope? I've made microcontroller and surfacemount pcb stuff before but never rf so I have no idea. If you could tell me or direct me to another website which explains this that would be really appreciated. Thanks!!!
.... sorry, I mean the section where you say "The adjustment of the RF oscillator can be tricky but works fine with the components shown here. The jumper resistor over the SAW element allows the frequency to be adjusted near the SAW fundamental frequency, then the jumper is removed and the circuit will oscillate at the SAW frequency".
p.s. thank you for posting this it looks really great! :)
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Thanks!! Very useful!!!
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