Re: [sdiy] voltage-controlled AM radio tuning

[rdrake]

i've done it w/ FM... found a kit w/ variactor tuning and just jammed in a CV.  as cheater sed, CAF.

bbob

>----- ------- Original Message ------- -----
>From: cheater00 at gmail.com
>To: synth-diy at dropmix.xs4all.nl
>Sent: Fri, 13 Mar 2009 15:11:09
>
>The idea sounds cool as fuck though.
>tuning into and out of a radio station in sync with
>tempo? hell yeah
>or better yet, 'choppers', 'blippers' and utility
>bands!
>
>On Fri, Mar 13, 2009 at 9:46 AM, Paul Perry
><pfperry at melbpc.org.au> wrote:
>> The cap ratio has to vary as the square of the
>frequency range ratio, so
>> that means a ratio of about 10 to 1.
>> You might find that to get a range like this, the
>max applied voltage will
>> bewell over 10 volts.
>>
>> What is worse, is that you will need to have at
>least two tracking systems -
>> the RF preamp and the local oscillator.
>>
>> paul perry Melbourne Australia
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