[sdiy] "Load" on power supply changes pitch of VCO...

[tony Rolando]

Tried a 15VAC supply?

TR


>From: "Mike Beauchamp" <mikebeauchamp at gmail.com>
>To: synth-diy at dropmix.xs4all.nl
>Subject: [sdiy] "Load" on power supply changes pitch of VCO...
>Date: Thu, 22 Feb 2007 01:07:45 -0500
>
>Paul Perry> If it helps, the powersupply I made for the XR-2206 VCO is
>a 12VAC wallwart that gets rectified, filtered with .1uf caps and
>470uF caps and fed into  7815 and 7915 voltage regulators to give me
>+15 and -15V.
>
>My VCO is "stable" in that it doesn't drift, however the frequency
>changes if I add more load (like an led or something) to the power
>supply.
>
>Maybe I'm wrong assuming that using power from voltage regulator chips
>gives me a "regulated power supply"?
>
>Mike
>
>On 2/21/07, Paul Perry <pfperry at melbpc.org.au> wrote:
>>If you want a stable VCO using an XR-2206, then you need a
>>regulated power supply.
>>
>>paul perry Melbourne Australia
>>
>>----- Original Message -----
>>From: "Mike Beauchamp"
>> > The first VCO I built was Thomas Henry's XR-2206 VCO
>> > (http://mypeoplepc.com/members/scottnoanh/birthofasynth/id20.html).
>> >
>> > I'm noticing that when I experiment and add various things, the pitch
>> > changes. It's as though the pitch is dependent on how much current I'm
>> > drawing from the power supply.
>> >
>>
>>
>
>
>--
>Mike Beauchamp
>Cross Canada Project: http://mikebeauchamp.com/crosscanada
>Personal: http://mikebeauchamp.com
>Business: http://therevox.com
>Windsor News: http://windsorinb.relyon.ca
>
>
>--
>Mike Beauchamp
>Cross Canada Project: http://mikebeauchamp.com/crosscanada
>Personal: http://mikebeauchamp.com
>Business: http://therevox.com
>Windsor News: http://windsorinb.relyon.ca

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