Re: First dot (was Re: [TenTec] Orion in action)

[Joe Giacobello <k2xx@swva.net>]

Carl, thanks for your reply and the enlightenment.  I now understand 
what you were actually referring to.  Your description of the QSK delay 
makes sense because I can hear the Orion's T/R relay clicking in synch 
with my keying irrespective of the delay setting.  So they're only 
controlling the time that the audio's off while the T/R relay follows 
the keying.

I understand the function of the "Ext T/R delay" for the amplifier, but 
would it also control the delay of the relays in the Orion?  That might 
solve the limitations on the delay at slower CW speeds that I was 
referring to and also minimize wear and tear on the Orion's T/R relay?  
I'll check it.

73, Joe

Carl Moreschi wrote:

> No, the QSK delay has nothing to do with this.  All the QSK delay does it
> change the time the receiver audio comes back on after transmitting.  The
> amp relay delay time is controlled by "Ext T/R delay".  This is set from 0
> percent to 100 percent with 100 percent equaling one second.  This control
> sets the extra time the amp key line stays on after the key line goes off.
> It is used to keep the amp antenna relay from coming up and down for each CW
> element.
>
> The keying problem That I was refering to in the earlier post can only be
> comtrolled insode the Orion firmware.  It relates to how long the
> transmitter actually transmits compared to how the CW key line is on.  The
> transmitter keys 20 milliseconds (that 20/1000 seconds) after the CW key
> line comes on.  In order to make up for this loss of 20 milliseconds, the
> transmitter should continue to stay on for 20 milliseconds after the key
> line goes off but it doesn't.  It only stays on for another 12 milliseconds
> making all CW elements short by about 8 milliseconds.  I see this as a
> firmware bug that should be corrected.
>
> Carl Moreschi N4PY
> Franklinton, NC
> ----- Original Message -----
> From: "Joe Giacobello" <k2xx@swva.net>
> To: <tentec@contesting.com>
> Sent: Thursday, March 25, 2004 3:17 PM
> Subject: Re: First dot (was Re: [TenTec] Orion in action)
>
>
>  
>
> > Carl and others, I am a new Orion owner and I have been trying to extend
> > the relay delay (or on time) by increasing the "QSK delay" setting.  I
> > am practically at a 100% and still the delay is quite short, especially
> > for speeds below 20 WPM.  When you refer to holding "the keying output
> > for about 12 seconds", are you talking about this setting?  I presume
> > that this setting is the only way to control the CW delay for non-QSK
> > operation?  If so, it is a serious limitation.
> >
> > 73, Joe
> >
> > Carl Moreschi wrote:
> >
> >    
> >
> > > Yes, they are all shortened.  In the tentec keying scheme, all dits and
> > >      
> dahs
>  
>
> > > are the first one.  The Orion needs to keep the keying held down for
> > >      
> about 8
>  
>
> > > milliseconds longer when the key line is released.  The current scheme
> > >      
> keys
>  
>
> > > the radio about 20 milliseconds after the key line is grounded but only
> > > holds the keying output for about 12 milliseconds after the key line is
> > > released.  This should be able to be corrected in a future firmware
> > >      
> release.
>  
>
> > > Carl Moreschi N4PY
> > > Franklinton, NC
> > > ----- Original Message -----
> > > From: "Carter Grabarczyk" <k8vt@ameritech.net>
> > > To: <tentec@contesting.com>
> > > Sent: Thursday, March 25, 2004 12:58 PM
> > > Subject: First dot (was Re: [TenTec] Orion in action)
> > >
> > >
> > >
> > >
> > >      
> > >
> > > > Tommy wrote:
> > > >
> > > >
> > > >
> > > >        
> > > >
> > > > > And yes, there is some clipping on the first couple of dot on the
> > > > > Orion.
> > > > > Tom - W4BQF
> > > > >
> > > > >
> > > > >          
> > > > Been reading about this topic for awhile. I also saw the keying picture
> > > > in QST with the first dot shortened.
> > > >
> > > > However, I'm confused. With QSK, isn't *every* dot the first dot? (thus
> > > > if one was shortened, you would think they would all be shortened).
> > > >
> > > > 73/Carter/K8VT
> > > >
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> > > >
> > > >
> > > >        
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> > >
> > >
> > >
> > >      
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> >    
>
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