[TenTec] new amp

[d.e.warnick at comcast.net]

Thanks Rick. Now I'll print your reply and study it with both manuals 

73 

Dave 

WA3F 





----- Original Message -----


From: "Rick - DJ0IP / NJ0IP" <Rick at DJ0IP.de> 
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com> 
Sent: Friday, August 17, 2012 1:28:03 PM 
Subject: Re: [TenTec] new amp 

Dave, 

When you key a dit 
  > The "T" line immediately is active 
  > The "T" line instantly applies a signal to the TX-Out jack, AND to the AMP jack. 
  > RF is normally applied about 15 ms later (might even be adjustable)... unless 
  > unless the keying loop is active. 
  > if the keying loop is active, the transceiver does not actually send RF until a signal is received back at its TX-EN jack. 
   
So for amps without the loop, they receive a signal to key their T/R relay about 15ms before RF comes, and it is assumed that is long enough.  For most modern amps, it is, but NOT all. 

In addition, the Orion and Omni7 can both add [what I call] "post-dit delay", which keeps the Amp's internal T/R relay keyed a tiny bit longer (adjustable in a software menu). 

73 
Rick, DJ0IP 

-----Original Message----- 
From: tentec-bounces at contesting.com [mailto:tentec-bounces at contesting.com] On Behalf Of d.e.warnick at comcast.net 
Sent: Friday, August 17, 2012 7:16 PM 
To: k9yc at arrl.net; Discussion of Ten-Tec Equipment 
Subject: Re: [TenTec] new amp 



Pleas e excuse my ignorance. I have used both methods of keying, but have never run a TenTec rig without the amp keying the transmitter. I understand that my xcvr will key the amp & that there needs to be a delay before the transmitter is keyed. 


What I'm missing is 'What keys my Omni VII or Orion II?' 

On theOrion II  TX menu, I could turn the Keying Loop off, but then I don't know where I would get any delay. The EXT TR delay will just hold the amp on so there is no true QSK. 

I shouldn't be confused, but I am. Sometimes I think the old gray matter is turning a different color. 

Thanks, 

Dave 

WA3F 




----- Original Message ----- 


From: "Jim Brown" <k9yc at audiosystemsgroup.com> 
To: tentec at contesting.com 
Sent: Friday, August 17, 2012 11:36:56 AM 
Subject: Re: [TenTec] new amp 

On 8/17/2012 7:01 AM, Duane Calvin wrote: 
> Does the KPA500 do full QSK when keyed by a TT rig (Orion, for 
> example)?  Does it use the keying loop strategy for keying?  Tnx. 

I haven't used it with a Ten Tec rig, but I see no reason why it would not do full QSK. It's designed to work with any transceiver, not only Elecraft rigs. It does NOT use the closed loop method. All you have to do is put the amp in TX mode (by activating the PTT line)  and the T/R switching will follow keying. 

73, Jim K9YC 
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