[timmy]

Originally Posted by bandersen

How much voltage are you putting across it? Red seems to work best.
http://www.hanssummers.com/varicap/varicapled.html

Same guy trying rectifier diodes as varactors.
http://www.hanssummers.com/varicap/varicapdiode.html

I think it’s around 30-35 volts different ground options for this it may be 15 volts or maybe just use a to92 transistor with high enough voltage and cut the base pin off.