[TenTec] AM operation (Jupiter 538)

[James C. Owen, III]

I think auto-set was used with an earlier version of the
software. With an earlier version the auto-set worked on my
Jupiter with the last couple it hasn't but the set up is fine.
Just set to AM, press the PTT and adjust the power out for less
than 25 watts and adjust the mic gain for the ALC light to wink
and all will be fine. If you make long transmittions on AM it is
nice to have a whisper fan blowing across the heat sink. At 25
watt carrrier it can get quite hot after 10-15 minutes, a fan
keeps it near room temp.
73 Jim K4CGY 
--- Bill Mahaffey <w6eet at cox.net> wrote:
> 
> I have read this. Numerous times.
> For months.
> 
> And I have followed it as well as my
> limited mental capabilities permit.
> 
> It does not work here.
> 
> Auto-set does not work as documented.
> 
> Thanks for responding.
> 
> 73, Bill W6EET
> 
> 
> 
> 
> > Jason N1SU,
> > 
> > The following information was copied from the RF Squared web
> site... 
> > 
> > This procedure does work..!
> > 
> > 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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