Now that is interesting - I never tried to use one for a varicap. RJG ----- Original Message ----- From: "Mark" To: Sent: Monday, January 26, 2004 6:39 PM Subject: Re: [OT ] Quick 1N400? question > On 26 Jan 2004 at 21:46, Mike Harrison wrote: > > > On Mon, 26 Jan 2004 12:54:54 -0800, you wrote: > > > > >Just for kicks, I decided to do a quick bench test of a 1N4004 and compare > > >it to a UF4004 to see the reverse recovery times (trr) first hand. I used > > >an HP3314A signal generator to drive the rectifier connected in series with > > >a 50 ohm load and measured the trr with a Tex 2456DMS scope. The signal was > > >a square wave at 100KHz at 10 volts p-p. > > > > > >The results: > > > > > >1N4004 4 microseconds trr (!) > > >UF4004 55 nanoseconds trr > > > > > >Interesting. > > > > It's hardly news that 1N diodes are lousy for switchmode applications...! > > > > But they make pretty good varicaps.... ;-)) > > Mark > > -- > http://www.piclist.com hint: To leave the PICList > mailto:piclist-unsubscribe-request@mitvma.mit.edu -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu