[Elecraft] 2-30 MHz Transmit?

[Fred Townsend]

A longer version of EME? No it stands for Military Amateur Radio Service.
Before fiber optics made overseas calling cheap most US overseas bases had a
MARS station to facilitate phone patches to the dependents. Now they are
mostly an emergency backup or auxiliary.  
73
Fred, AE6QL

-----Original Message-----
From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of web.de
Sent: Tuesday, April 07, 2015 1:53 AM
To: mzilmer at roadrunner.com
Cc: elecraft at mailman.qth.net
Subject: Re: [Elecraft] 2-30 MHz Transmit?

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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> Matt Zilmer, W6NIA
> --
> "Always store beer in a dark place."  -R. Heinlein
> 
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