"transistorphonics"

[Steve Farkas]

Microphones doesn't have to be tubes, a slight mechanical movement causes
capacitive and inductance changes (usually the former). There are commercial
microphones that take advantage of of capacitive changes to detect audio.

My first FM signal was generated my attaching a speaker to a VFO and making
the plates of the tuning cap shift the frequency.

Steve


> -----Original Message-----
> From: Heathkit Owners and Collectors List
> [mailto:HEATH at LISTSERV.TEMPE.GOV]On Behalf Of Peter L Thompson
> Sent: Tuesday, March 09, 1999 7:48 PM
> To: HEATH at LISTSERV.TEMPE.GOV
> Subject: "transistorphonics"
>
>
> Hi, Heath fans
> How can you have microphonics in a solid state scanner?
> Anyone have a suggestion for that one? I'll listen............
>
> pete.......51 years of electronicals & I still don't have all
>                 the answers.................pete14 at juno.com
>
> --- --- --- --- --- --- --- --- --- --- --- --- --- --
> To subscribe: listserv at listserv.tempe.gov
> and in body: subscribe HEATH yourfirstname yourlastname
> To unsubscribe:  listserv at listserv.tempe.gov
> and in body: signoff HEATH
> Archives for HEATH: http://www.tempe.gov/archives
> --- --- --- --- --- --- --- --- --- --- --- --- --- --
>

--- --- --- --- --- --- --- --- --- --- --- --- --- --
To subscribe: listserv at listserv.tempe.gov
and in body: subscribe HEATH yourfirstname yourlastname
To unsubscribe:  listserv at listserv.tempe.gov
and in body: signoff HEATH
Archives for HEATH: http://www.tempe.gov/archives
--- --- --- --- --- --- --- --- --- --- --- --- --- --