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.
>------- Original Message -------
>From : Robert & Linda McGraw K4TAX[mailto:RMcGraw@Blomand.Net]
>Sent : 6/6/2005 9:00:36 PM
>To : firstname.lastname@example.org
>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.
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