[TenTec] cw creation

[James Duffer]

>From: "Steve N4LQ" <n4lq at iglou.com>
>Reply-To: Discussion of Ten-Tec Equipment <tentec at contesting.com>
>To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
>Subject: Re: [TenTec] cw creation
>Date: Mon, 25 Apr 2005 20:14:49 -0400
>
>Name one for instance so we can check it out.


One example could be the SBE Model 34 (Sideband Engineer) with its coadapter 
which generated a "close" to sine wave audio tone that was introduced into 
the microphone jack, generating an apparently legal type of "CW."  Similar 
generation was accomplished in the early Collins line.

Other examples are the "Ultra Low-Cost HF SSB/CW Transceiver (20 watts) 
designed by Denys Roussel F6IWF published in VHG Communication Magazine (URL 
www.vhfcomm.co.uk/vhfindex.htm, and "A Single Sideband Modulator for the Low 
Frequency (LF) Transmitter (The Phasing System of SSB revisited by Lloyd 
Butler VK5BR, originally published in "Amateur Radio", September 2000.

Apparently this method had it problems and required rigid alignment to 
prevent unwanted transmitted frequencies associated with this method.

73, Jim (wd4air)






>
>Steve Ellington
>N4LQ at iglou.com
>----- Original Message -----
>From: "James Duffer" <dufferjames at hotmail.com>
>To: <tentec at contesting.com>
>Sent: Monday, April 25, 2005 7:51 PM
>Subject: Re: [TenTec] cw creation
>
>
> >
> >
> > Snip
> >
> >>In any case the best way to get
> >>a clean CW signal out of most rigs is to use CW mode and an key input,
> >>NOT SSB and a keyed audio tone input.
> >
> > Snip
> >
> > That is what this thread was about!  The method a SSB rig uses to create
> > CW.
> >  A great many rigs use a single sinusoid audio tone to create a psuedo 
>CW
> > signal.
> >
> > An interesting thread.
> >
> > Jim wd4air
>