[TenTec] RE : Keying Amp with my new Omni VI+

[Dave Edwards]

But if the amp is QSK, why not just connect it for QSK with the enable in 
and out connections...this way, not using the T/R relay?

....Dave
----- Original Message ----- 
From: <knesbitt at nucleus.com>
To: <tentec at contesting.com>
Sent: Wednesday, June 08, 2005 12:29 AM
Subject: [TenTec] RE : Keying Amp with my new Omni VI+


> Assuming the QRO amp is QSK capable will this permit the safe use of the 
> RELAY OUT on the OMNI in "semi break-in" mode (i.e: slow QSK). Theres no 
> way I'm going to want to mess with manual PTT in a cw exchange.
>
> Kirb,&nbsp; VE6IV
>
>
>
>>------- Original Message -------
>>From : Robert &amp; Linda McGraw K4TAX[mailto:RMcGraw at Blomand.Net]
>>Sent : 6/6/2005 9:00:36 PM
>>To : tentec at contesting.com
>>Cc :
>>Subject : RE : [TenTec] Keying Amp with my new Omni VI+
>>
>>One point often missed or not understood is the QSK keying process when
>>using an amplifier. In the case of the Paragon series and the Omni series
>>the relay in the transceiver shouldn't be used to key the amp. Tentec uses
>>a "loop through" sequenced process for the QSK event timing.
>>
>>I'll try to explain:
>>When the key is connected to the transceiver KEY jack on the rear and the
>>key is closed (line goes low) here's what happens. At this point the
>>transceiver RF section is not activated. The control signal goes to the TX
>>OUT jack (line goes low) which is connected to the KEY IN on the amp. This
>>line low keys the amp. The transceiver is still not activated. Once the
>>amp QSK circuit is activated the input and output relays have switched and
>>they have settled, then a signal is sent out of the KEY OUT jack (line 
>>goes
>>low) of the amp. This signal goes to the TX ENable jack on the 
>>transceiver.
>>This is the point that the transceiver is activated and produces RF to 
>>drive
>>the amp. This sequence thus prevents hot switching within the amp.
>>
>>If you elect to use the RELAY OUT on the transceiver to key the amp, you
>>have no way to prevent "hot switching" within the amp. The jumper is in
>>place between TX OUT and TX EN on the back of the transceiver. There is no
>>delay to allow the amp relay(s) to switch and settle. If your amp isn't a
>>QSK capable amp, then you're on your own. My suggestion is to use manual
>>PTT and not try to use QSK operation.
>>
>>73
>>Bob, K4TAX
>>
>>
>>
>>
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