[TenTec] cw creation

[Williams, Barry]

Ken,

I have an ex-embassy commercial transmitter, the Sunair GSE-924 that
injects a 1 kHz sine wave while in USB mode to produce CW.  This is a
pretty impressive rig, no cooling fan 30 w AM, 100 SSB and 100 CW.  I
have an idea that it was not much used in the CW mode.  They do warn you
that the transmit frequency is 1 kHz above the indicated frequency while
in the CW mode.

Thanks,
Barry


-----Original Message-----
From: tentec-bounces at contesting.com
[mailto:tentec-bounces at contesting.com] On Behalf Of Ken Brown
Sent: Tuesday, April 26, 2005 12:30 AM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] cw creation

Re: Name one for instance so we can check it out.
...

Yea, really! I know a lot of rigs unbalance the balanced modulator with 
a DC input to generate CW. And I read in this thread that an old Collins

used the audio tone input to the balanced modulator. What other rig 
generates an audio tone on CW and uses it for anything other than the 
sidetone? I'm sure there must be one, can you name one?
...

In any case the best way to get a clean CW signal out of most rigs is to

use CW mode and a key input, NOT SSB and a keyed audio tone input.
...

That is what this thread was about! The method a SSB rig uses to create
CW.
...

Yes, and someone asked about using a sound card for CW generation. This 
may have the same result, but is not the same as the transceiver 
producing CW, when it is in CW mode, by generating an audio tone within 
the transceiver and sending it into the balanced modulator. I still 
maintain that using the rig in CW mode and keying it with a contact 
closure at the rig's key input (or using a builtin keyer) is in most 
cases going to produce a cleaner CW signal than running a sound card 
into it in SSB mode. There may be exceptions with certain rigs that 
produce bad CW. Yaeclix 1000s maybe.

...

A great many rigs use a single sinusoid audio tone to create a psuedo CW

signal.
...
 
I await your list of rigs that do this.

DE N6KB


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