Time Machine... (fwd)

[prinaldo@mindspring.com]

Gang,
FYI. Sounds like your old pre-d recorder.
Paul, W4RI

-------- Forwarded message --------

>N4ES, Bill Coleman of Clearwater, FL, has designed a device that will
>permit the recording of 80 kHz of any HF amateur band on the audio
>portion of a "hi-fi audio" VCR. It is marketed as a kit called the
>"Time Machine" by Expanded Spectrum Systems of Tampa. A number of us
>bought these kits at Dayton.
>
>The device basically is a bandpass-filter that lets a single amateur
>band through, followed by an I-Q mixer that heterodynes the signals to
>DC. I and Q data are then recorded on left and right channels of the
>VCR audio track. They are later read out, upconverted, and then can be
>fed into a receiver's antenna terminal. You can tune the receiver up
>and down the band.

http://www.expandedspectrumsystems.com/

L