[TenTec] TT Orion: Also SEMI-BK-IN possible ?

[Bob Henderson]

So far as I'm aware, all contest programs have provision for PTT 
control. However, I am unaware of any that provide the functionality you 
refer to for the Orion or any other rig.

Bob, 5B4AGN


Carl Moreschi wrote:

>The same computer program can then change the semi-BK-in delay when the last
>character has been sent because on the Orion, everything is also adjustable
>in software.
>
>Carl Moreschi N4PY
>Franklinton, NC
>----- Original Message -----
>From: "Bob Henderson" <bob at cytanet.com.cy>
>To: <tentec at contesting.com>
>Sent: Sunday, December 28, 2003 1:44 AM
>Subject: Re: [TenTec] TT Orion: Also SEMI-BK-IN possible ?
>
>
>  
>
>>Carl
>>
>>The computer knows exactly when the last character element of an
>>exchange has been sent and can reliquish PTT at exactly that moment.  No
>>delay.  Using semi BK-in the delay you set has to be long enough to be
>>sure you have sent that last character element before you revert to RX.
>>Working at high speed this extra delay causes problems.
>>
>>Bob, 5B4AGN, P3F
>>
>>Carl Moreschi wrote:
>>
>>    
>>
>>>The Orion "Amp Key" line will go to ground about 20 milliseconds before
>>>      
>>>
>the
>  
>
>>>Orion actually transmits a signal.  It will then stay ground for up to a
>>>      
>>>
>one
>  
>
>>>second delay after transmit finishes.  This delay is adjustable from 0 to
>>>      
>>>
>1
>  
>
>>>second.   It seems to me that this line provides all the timing that is
>>>necessary to key external equipment and protect it from a transmit
>>>      
>>>
>signal.
>  
>
>>>Am I missing something?
>>>
>>>There is also a variable QSK delay you can independently adjust for  how
>>>long it takes the receiver to come back on after transmit is finished.
>>>      
>>>
>This
>  
>
>>>delay is also adjustable from 0 to 1 second.
>>>
>>>Carl Moreschi N4PY
>>>Franklinton, NC
>>>----- Original Message -----
>>>From: <K3BU at aol.com>
>>>To: <tentec at contesting.com>
>>>Sent: Saturday, December 27, 2003 11:40 PM
>>>Subject: Re: [TenTec] TT Orion: Also SEMI-BK-IN possible ?
>>>
>>>
>>>
>>>
>>>      
>>>
>>>>In a message dated 12/27/03 6:18:13 PM Eastern Standard Time,
>>>>dh0ghu at dh0ghu.de writes:
>>>>
>>>>
>>>>        
>>>>
>>>>>>Of course I agree with Jack that on HF, QSK is an abolute must for
>>>>>>
>>>>>>
>>>>>>            
>>>>>>
>>>>reliable operation. It has nothing to do with PTT: Be sure, I'll not use
>>>>a PTT for CW contesting, I only have two hands, one for the PC, one for
>>>>the keyer, that's all...)<<
>>>>
>>>>If I understand, you seem to consider PTT to be Phoot To Talk.  PTT line
>>>>
>>>>
>>>>        
>>>>
>>>is
>>>
>>>
>>>      
>>>
>>>>used by computer to switch system from receive to transmit and vice
>>>>        
>>>>
>versa.
>  
>
>>>>        
>>>>
>>>With
>>>
>>>
>>>      
>>>
>>>>bunch of equipment like amplifiers and switching systems for radios and
>>>>antennas, precise control of PTT signal timing allows to fine tune the
>>>>
>>>>
>>>>        
>>>>
>>>system,
>>>
>>>
>>>      
>>>
>>>>eliminate hot switching, millions of unnecessary cyclings and
>>>>        
>>>>
>unnecessary
>  
>
>>>>        
>>>>
>>>delays
>>>
>>>
>>>      
>>>
>>>>as experienced with semi-BK. We do not use PTT for foot switch type
>>>>
>>>>
>>>>        
>>>>
>>>control by
>>>
>>>
>>>      
>>>
>>>>real feet.
>>>>
>>>>Yuri, K3BU
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>>>>
>>>>
>>>>        
>>>>
>>>_______________________________________________
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>>>
>>>
>>>
>>>      
>>>
>>
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>>    
>>
>
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>