From: Patrick Jankowiak (recycler@swbell.net)
Date: Sat Mar 19 2005 - 12:38:46 PST
The only questionable thing that sticks out on that one (besides
what it probably costs) is:
"Gain -6 db to +1 db ref 1/4 Wave radiator on 10X10X10 GP"
J. Wiehe wrote:
>>From Aug. 27, 2003.
>
> I have not tried this so, as some have said,
> " Your mileage may vary ".
>
> If you're in the just gotta have mode:
>
> http://shakespeare-military.com/broadband/sf3512.htm
>
> Jim Wiehe VA3JHW
> j.wiehe@sympatico.ca
>
>
> From: "prcradio" <km6ab@p...>
> Date: Wed Aug 27, 2003 3:31 pm
> Subject: Re: Modify an MX-6707 with AS-1729 for use on CB?
>
>
>
>
>
> Here are some instructions I gave someone a while back, don't know if
> they did it or how it worked but it's worth a try:
>
> Take the bottom cover off the 1729 and look at the bottom of the ant
> with the coax cable/connector facing you. Find the 5th tuning
> capacitor
> (small screw driver adjustment) counting from the coax cable in a
> counter-clockwise direction. This capacitor (C8) tunes the lowest band
> 30-33mhz on the antenna and will probably allow you to match the
> antenna at 27mhz. You will need to have the whip attached and
> preferably mount the antenna on the vehicle. If not mounted, tune the
> antenna on a wooden ladder, away from any large metal objects. This
> antenna does not require a ground plane.
> Hope this helps.--
>
> In armyradios@yahoogroups.com, "Rick" <kingkozy@p...> wrote:
>
>>Hi Again,
>>
>>Wow thanks for all the responses. I put a MX6707 and AS-1729 on my
>>Hummer for visibility on drives in dust and the such like, mag
>
> mounts
>
>>are okay, but they get knocked off all the time from overhead
>>branches, I'd really like to try the mod on the MX6707 to match to
>
> CB,
>
>>it is an awesome, damage tolerance antenna. Does anybody have a list
>>of the values of the coils and condensers shown on the schematic for
>>the MX6707? There is an empty position on the rotary switch that
>>would lend itself beautifully to modification. I checked the SWR
>
> and
>
>>it was 4.5 at CB freqs in the 30-33 position and about 7 at 56-60
>>position, with the appropriate frequencies, it was 1.1 to 1.3 over
>
> the
>
>>entire range on nearly all freq position, I was impressed, the
>>government makes good stuff. I wish they would go to 2meters.
>>
>>Rick
>
>
>
>
>>OTOH, if you make it work, I'd definitely be interested to hear about it.
>>I'm currently gearing up to try to figure out what it'd take to use an
>>AS-1729 on CB (I'm mostly intererested in how to modify the antenna to
>>reduce SWR, rather than just assuming that I have to match using
>>electronics). However, I'm a beginner and there isn't all that much
>>technical info available on the beast... I don't even know (yet?) what exact
>>elements were used in MX-6707 for 30-33MHz range. I think I'll have to
>>find/build a grid dip oscillator as a starter point (and I suspect you'd
>>have to do the same, no matter which antenna you pick). However, if you're
>>in the rural area, you might be able to go to some good CB/HAM shop. I have
>>no idea where to find one in the Bay Area :-(
>>
>>Vadim.
>
>
>
> ===Mil-Veh is a member-supported mailing list===
> To unsubscribe, send e-mail to: <mil-veh-off@mil-veh.org>
> To switch to the DIGEST mode, send e-mail to <mil-veh-digest@mil-veh.org>
> To reach a human, contact <ack@mil-veh.org>
>
This archive was generated by hypermail 2.1.4 : Sat May 07 2005 - 20:41:24 PDT