Some Great Finds Today

From: Gary Hildebrand <ghldbrd_at_ccp.com>
Date: Wed Jul 31 11:05:01 2002

Tony Duell wrote:
>
> > 3. A Advanced Electronic Applications, Inc. Computer Patch Interface. =
> > It's a gray metal box with the following on the faceplate Filter - Tune =
> > - Var Shift - STBY/PTT - NORM - OFF/ON - PWR light. Under the Filter =
> > title are three buttons named VAR - 170 - CW.
> > It's a model CP-1 and on the back are lots of phono ports. Anyone have =
> > info on this unit?
>
> No real info (as in : no manual), but it sounds like it's got something
> to do with amateur radio (ham radio). At least for RTTY (Radio Teletype)
> and maybe for morse code as well.
>
> 170 (Hz) is a common shift between Mark and Space frequencies for amateur
> RTTY IIRC. CW would be Continuous Wave, here used to mean on/off keying,
> normally used for morse code.
>
> -tony
It is a demodulator for AFSK signals used in ham radio and cmmercial TTY
stations. Common shifts are 170 and 850 Hz, commercial boys use 425.
Also copies CW morse code with proper software. You can hook it up to a
SW receiver and copy news broadcasts with the computer, if you have a
Baudot program.

AEA is still in business, in Lynwood, WA, if you need more info.

Gary HIldebrand
ST. Joseph, MO
Received on Wed Jul 31 2002 - 11:05:01 BST