[Elecraft] 2-30 MHz Transmit?

[Tim Tucker]

Wikipedia has a pretty good explanation on the history and current mission
of the MARS services:

http://en.wikipedia.org/wiki/Military_Auxiliary_Radio_System



On Tue, Apr 7, 2015 at 7:05 AM, Matt Zilmer <mzilmer at roadrunner.com> wrote:

> Military Auxiliary Radio System.
>
> 73,
> matt W6NIA
>
>
> On Tue, 7 Apr 2015 10:53:26 +0200, you wrote:
>
> >Hello,
> >
> >Just for me as a Kraut, what is MARS?
> >
> >Christian
> >
> >Von meinem iPad gesendet
> >
> >> Am 06.04.2015 um 19:04 schrieb Matt Zilmer <mzilmer at roadrunner.com>:
> >>
> >> Hi Jay,
> >>
> >> I use my older K3 and a newer one on MARS frequencies.  The KX3 is
> >> used as a MARS ECOM / mobile unit with the KXPA100 amp.
> >>
> >> The K3 has a TX donut hole around the 8.2 MHz IF.  I think TX is
> >> locked out from 7.5 to 9.0 MHz (if memory serves).  The KX3 has no
> >> such restriction, being a Zero IF transceiver.
> >>
> >> Elecraft customer support can assist you with the unlock programs
> >> needed.  You may have to supply your MARS credentials, but I'm not
> >> sure how that is handled today.  It's been a while since I unlocked my
> >> radios here.
> >>
> >> Except for the K3's IF range, I've found no problems with TX and RX
> >> from around 2.8 MHz to 25 MHz.  KBPF3 use is recommended though, so
> >> that you have enough gain between ham bands.  Otherwise, the
> >> sensitivity falls off in between bands.  Note: There is very little
> >> MARS / SHARES activity above 20 MHz.
> >>
> >> I'm also using the KX3's 2m module to work an above-and-below MARS VHF
> >> repeater split, plus the odd set of simplex frequencies NMCM has
> >> around 2m.
> >>
> >> Again, from memory, Elecraft specifies performance inside the ham
> >> bands.  I don't believe there are any published specs for general
> >> coverage.  I haven't found any problems with between-band operation -
> >> plenty of sensitivity and dynamic range, etc.
> >>
> >> 73!
> >> matt W6NIA / NNN0UET
> >>
> >>
> >>
> >>> On Mon, 6 Apr 2015 09:37:12 -0700, you wrote:
> >>>
> >>> Can someone furnish the exact "unlocked" or MARS transmit frequency
> >>> specifications for the K2, KX3 and K3?
> >>>
> >>>
> >>>
> >>> I think some of these radios may have gaps - due to RF filtering, IF,
> etc.
> >>>
> >>>
> >>>
> >>> Also, what about the unlocked transmit specs for VHF in these radios?
> >>>
> >>>
> >>>
> >>> Thanks,
> >>>
> >>>
> >>>
> >>> Jay
> >>>
> >>> W6CJ
> >>>
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> >>>
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> >> Matt Zilmer, W6NIA
> >> --
> >> "Always store beer in a dark place."  -R. Heinlein
> >>
> >> ______________________________________________________________
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> >>
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> >> Message delivered to dg5bka at web.de
> Matt Zilmer, W6NIA
> --
> "Always store beer in a dark place."  -R. Heinlein
>
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NNN0GAF FOUR, Southern CA Director Assistant for Training, Navy MARS