Find out where you want it and put a dab of silicone sealer on each foot.  If you want to move it, just pry it up and peal the silicone off of the feet and desk!

Les, AA4F

Modifications to the MFJ 1925 ATAS antenna controller.

I have a mobile set up with the Icom 706 Mk IIG, a Yaesu ATAS 120 antenna and an MFJ 1925 controller for the antenna.  This makes a sweet mobile station!

A couple things about the MFJ controller bothered me and I came up with two modifications to make it work better.  The first problem is the controller keys the rig all the time a frequency change is being made.  Changing from 20 meters to 40 meters takes about 15 seconds for the coil to move the necessary distance. The rig is transmitting the entire time.  This problem can be fixed with a small SPST switch installed in the front of the box.  Mount it near the end and between the MFJ logo and ATAS.  This switch interrupts the white wire in the box, from the control cable to the large rocker switch. With the added switch in the  OFF position the antenna can be tuned for peak noise and turned ON for the final tune up.


The second problem is the rig is unkeyed as soon as the up/dn switch is released.  You can not be sure you did not pass the point of lowest SWR.  This is fixed by installing a 1000 mf. capacitor across the rocker switch.  The large rocker switch is soldered through the circuit board on the opposite end from the control cable and has 6 large pins.  Use 2 of the 3 pins next to the end of the board.  The capacitor is connected between the center switch pin and one of the other 2 pins. This lets the radio remain keyed about 2 seconds after the rocker switch is released.

With the added switch and capacitor you can minimize your transmitting time and QRM while tuning the antenna.  The delayed return to receive lets you be sure the antenna is tuned to the right place.  I have enjoyed using my controller with these mods and think you will too!


Les,  AA4F
lcox107@comcast.net

I see the FCC has approved the use of the F word on prime time network television.  Does this apply to Ham Radio too?

Do a search on ebay for either rig.  See how many are for sale. See what options are available and how much they cost.  If cost is a factor then this is a good place to start!  You may want to purchase one new, but this is a way to find out how much they are valued or how much they drop in value after the sale.

I have found this is a goodplace to start with any radio purchase.  If you buy a rig that is not popular or falls apart quickly you will see the price fall out fast.  If it is not popular the options will be available NEW ONLY, and at top dollar!

I started with a couple 706 mk2s and moved up to 2 706 Mk IIGs.  They are a great rig that just keeps on working!  You can not go wrong with this rig.

Not sure about the FT 857

Les,
AA4F