[TenTec] AM operation (Jupiter 538)

[jsb at digistar.com]

On Tue, 16 Mar 2004, W1GOR wrote:

> The following information was copied from the RF Squared web site...
>
> This procedure does work..!

I've seen these before - to me it looks like I have to change AM-DRIVE to
25 watts or less and adjust the mic gain so that the ALC light only comes
on during voice peaks.

But what I do not understand is what the AM-AUTO-SET feature does since
i've already adjusted the mic gain and carrier level.

I pressed the TUNE button and let the rig sit there for a whole 60 seconds
waiting for something to change on the rig and nothing happened,
regardless of where the mic and drive gain settings were.


Anyone at Ten-Tec care to clarify?


thanks,
Jason

>
> 73, Larry - W1GOR
>
>
> Setting up AM transmit
>
>
> 	AM transmit capability has been added to the Jupiter and
> 	Pegasus transceivers. The transceiver must be adjusted
> 	before using AM transmit to set the carrier level. The
> 	carrier level should be adjusted to  25 Watts or less.
> 	The basic steps are similar on the Jupiter and Pegasus
> 	transceivers. In addition, the Jupiter has an additional
> 	auto-set mode. The microphone gain should be adjusted in
> 	SSB mode to prevent over modulation while in AM mode. If
> 	you are already using the transceiver in SSB then the setting
> 	should be fine. Presently AM Transmit Bandwidth is not adjustable.
>
>
> JUPITER 538
>
> 	On the Jupiter, two controls operate differently while in AM mode.
> 	The PWR setting control changes to become AM DRIVE control. This
> 	control is used to adjust the carrier level. The TUNE button
> 	activates a function called AM-AUTO-SET. When TUNE is pressed the
> 	transceiver will turn on the transmitter and adjust the AM-DRIV
> 	control for a nominal 25 Watt carrier. It takes the transceiver
> 	several seconds to perform this operation. When the process is
> 	complete the transceiver will return to receive. It is important
> 	to know that during this process the output from the transceiver
> 	will be a full 100 Watts. A dummy load should be used and any
> 	amplifiers in line should be switched to bypass. After the AM-AUTO-SET
> 	the AM DRIVE control can be used to adjust the output if needed.
> 	The PWR setting is not accessible in AM mode as AM DRIVE is used to
> 	adjust the power output.
>
>
> -----Original Message-----
> From: tentec-bounces at contesting.com
> [mailto:tentec-bounces at contesting.com]On Behalf Of Jason Buchanan
> Sent: Tuesday, March 16, 2004 2:17 AM
> To: tentec at contesting.com
> Subject: [TenTec] AM operation
>
>
>
> Has anyone out there any experience running AM on the Jupiter?
>
>
> I pressed the TUNE button while in AM mode but didn't see anything
> change as I expected - AM drive, mic gain, etc all stay the same values.
>   The jupiter's meter shows 14 watts out and just sits there until I
> press TUNE again to make it stop.
>
>
> Any ideas/suggestions?
>
>
> Thanks!
>
>
> 73 Jason N1SU
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