Xref: utzoo sci.electronics:19515 rec.radio.amateur.misc:1924
Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!caen!ox.com!emory!ogicse!orstcs!jacobs.CS.ORST.EDU!youngqd
From: youngqd@jacobs.CS.ORST.EDU (Dean Youngquist)
Newsgroups: sci.electronics,rec.radio.amateur.misc
Subject: Re: Adjust frequency of 4 terminal, rectanglular oscillators.
Message-ID: <1991Apr22.170544.17802@lynx.CS.ORST.EDU>
Date: 22 Apr 91 17:05:44 GMT
References: <1991Apr20.231230.5685@zoo.toronto.edu> <1991Apr20.235945.7393@zoo.toronto.edu> <1991Apr22.135656.20511@news.larc.nasa.gov>
Sender: @lynx.CS.ORST.EDU
Organization: Oregon State University, CS Dept.
Lines: 12
Nntp-Posting-Host: jacobs.cs.orst.edu

>Nope, he's probably using a crystal oscillator as you said (or one with a
>ceramic resonator).  What he should be using is a voltage-controlled
>oscillator in a 4-pin can, like the ones that MuRata Erie make.  I do 
>heartily recommend them.
>--scott
>   (or you can always open up the can and put a varactor diode across the
>element, then adjust the bias of the varactor to slew it like a VCXO)

I was using the xtal oscillators. A VCO in a can or a xtal osc with an
input to a variactor diode would be good. Please flood my mailbox with
sources!
Dean Youngquist      youngqd@jacobs.cs.orst.edu