GE Mastr Exec II Instructions Manual

Instructions for Converting a GE Mastr Exec II for Reapeater Operation

By Michael Mullikin W8EHH

with Thanks to Ron Wright N9EE and Ryan Seregow

1.MAKE SURE THE RADIO WORKS BEFORE DOING ANY MODS. Download LBI 30043 from the Repeater Builders GE files section, If you do not have this already.

2.Remove Top and Bottom Cases.

3.Unscrew the Plastic Handle/Front.

4.Remove the Top 6 Screws from the receiver side and Loosen the Bottom 4 screws. This will allow the side plate enough movement to remove the TX and RX cable to the front. Save the Receiver Ant cable for later use.

5.Remove the 4 screws 2 top , 2 bottom holding the Power/Control Plug.

6.Mark it out so you can open the opening. Be sure to leave enough room for mounting screws. I just barley had enough so be cautious. Also mark out for Rcvr connector.

Should look like this

7.Now cut a piece of aluminum for the face plate about 3 ½” X 3 1/8”. You do not have to have all the controls that I have. Use as much or as little as you like. I have Volume, Squelch, PTT LED, COS LED, Power LED, Monitor or CTCSS switch and a TX-OFF-Repeater Switch. Plus a DB-9 for the Controller. If you Just want a Repeater with no controls other than the Controller you just need the DB-9 and the TX PL-259

8.Lay out your panel and drill all the holes. BESURE to place panel on opening and mark your side top and bottom limits. In case you haven’t guessed I have not fancy tools. All Hand tools that why it is so rough.

9.Use the 14 pin Plug P901 that was on the power control plug you removed Cut and splice the wires you need.

The way I wired the DB-9 is as Follows.

Pin 1	NC
Pin 2	NC
Pin 3	PTT	Pin 6 of 901A
Pin 4	TX Audio	Pin 14 of 901A
Pin 5	RX Audio	Pin 11 of 901A
Pin 6	Ground	Pin 2 of 901A
Pin 7	COS	TP 901 on SAS Board

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