Antennae and bases

[Mick_Marsh]

I have an antenna base for the Perentie.

So, what do all the switch positions mean?

Oh, and where can I get an antenna?

[aussiegregmac]

You're looking at three things on the base of the AMU-6707.
1.  The RF cable with a BNC fitting to receive and transmit the signal.
2.  The connector for the power wire from radio to the AMU
3.  Which also tells the AMU what Freq. you are using.
Which will then cause the little switch to rotate to point to the Freq. on
the illustrated figures.  Caused by a little solenoid inside which will rotate
one direction only.  If the solenoid is faulty or you don't have the power
wire you can select the Freq. used manually.
This then tell the Antennae to use the length necessary to suit the Freq.

Keep watching fleabay for the Ant. Elements.  Most likely Israel.
They are now superceded and surplus.  Hard to find someone in the US
who will export.   Known as the AS-1729 Antennae system.

http://www.associated-ind.com/vehicular_products_as1729.htm

Have fun,  Greg Mac.

[Mike C]

Mick

What you are looking for is the two antenna elements that form parts of the AS-1729/VRC antenna:

The lower is the Antenna Element AS-1730/VRC, which screws onto the top (the big spring-thing) of the Antenna Matching Unit Base MX-6707/VRC , ie the top of the Antenna Matching Unit. You already have the AMU.

The upper element was the Antenna Element AT-1095/VRC.

Those two numbers/nomenclatures should allow you to be quite specific when you are looking around or making inquiries.

As Greg said, there are two cables that connect the AMU with the RT set: the CX-4722/U attaches to the ANT CON terminal of the RT, and the MX-6707. If the CX-4722/U is not connected, the AMU has to be turned to the frequency manually. (cable '2' in Greg's post)

The CG-1773/U  is the RF cable between the set and AMU. ('1' in Greg's post)

Hope you have some luck in finding these.

Mike C



 

[kman]

and every so often undo the drain screw to release any water that has built up inside the unit.

Howard

[aussiegregmac]

Oh Yeah,  every so often undo the drain screw blah blah blah.  you know, what he said.
There's also a thread to screw on an earthing strap.

[kman]

blah, blah, blah is explained in this graphic

[BadCo.]

Can the Army antennae be used on the civilian band? Couldn't see a 27 or 477 on the base.

Or are you doing it for collecting reasons? Maybe commercial use?


Cheers,

Bad

[kman]

As it stands it cannot be used on 27 or 477 MHz. It can be used on the 6 metre amateur band, low band VHF commercial frequencies (e.g. rural fire, parks and wildlife qld).

Howard

[Diana Alan]

As it stands it cannot be used on 27 or 477 MHz. It can be used on the 6 metre amateur band, low band VHF commercial frequencies (e.g. rural fire, parks and wildlife qld).

Howard

Well actually with the length of the AS-1730/VRC and AT-1095/VRC element combination and the MX-6707/VRC ATU switched down to 30-33MHz you will get reasonable propargation on 27MHz CB.

You could then use an SWR meter/matcher to tune the antenna system properly. 

Years ago in the Whisky-Delta 4WD CB club we used to tune up gum trees as antenna,