Hi Folks, I'm trying to stretch the tuning range of a varacter-tuned oscillator. I'd like it to cover the standard 88 - 108 MHz band, but I'm only getting from
88 to 96. The varactor is NTE613, and the spec sheet says that the C2/C30 ratio is about 2.9. I think the frequency ratio is the square root of that, so that would be about 1.7. That's a pretty wide tuning ratio. I'm only getting about a 1.1 ratio, but I only need about 1.3. That doesn't seem like asking too much does it? I'm operating the varacter from 0 to 26 volts regulated. It tunes nicely, but I don't know how to extend the range. Any suggestions would be greatly appreciated.Allen
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