First dot (was Re: [TenTec] Orion in action)
Joe Giacobello
k2xx at swva.net
Sat Mar 27 10:57:52 EST 2004
OK, Carl. My first impression from reading the manual was that the "Ext
T/R delay" was as you say, but I thought maybe I had missed something.
This is my first TT transceiver so I wasn't aware of their keying
scheme. The QSK delay is then the only option to prevent hearing
receiver noise between code elements or words at slow speeds. I hope
they extend the range of that function in future firmware revisions.
Thanks for your help.
73, Joe
Carl Moreschi wrote:
>The EXT T/R delay has nothing to do with the Orion's T/R switching. It is
>just for external use.
>The Orion's antenna relay must switch on every dit and dah by design. Every
>tentec rig I have ever seen works this way since the Tritons. It is a
>proven design and works very well.
>
>Carl Moreschi N4PY
>Franklinton, NC
>----- Original Message -----
>From: "Joe Giacobello" <k2xx at swva.net>
>To: <tentec at contesting.com>
>Sent: Friday, March 26, 2004 5:05 PM
>Subject: Re: First dot (was Re: [TenTec] Orion in action)
>
>
>
>
>>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 at swva.net>
>>>To: <tentec at 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 at ameritech.net>
>>>>>To: <tentec at 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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>>>>>>TenTec at contesting.com
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>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>_______________________________________________
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>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>_______________________________________________
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>>>>
>>>>
>>>>
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>>>
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