THE NL3ASD MODIFICATION FILES - THE HAM RADIO MODIFICATION - PAGES T TO ZHOMEPAGE

Subject:Submitting TH-G71A Radio Mod.

Date:Mon, 12 Oct 1998 03:45:08 PDT





TH-G71A "Beyond MARS" Mod



1. Remove the battery pack and antenna

2. Open the SPKR/MIC dust cover.

3. Remove the three screws from the back panel of the transceiver.

4. Carefully lift up the bottom end of the back panel and pull the

entire back panel toward the bottom of the transceiver to clear the

antenna connector from the top panel.  Do not break the ribbon cable

that connects the back panel PCB to the front case PCB.

5. Set the back panel to the left of the front case.

6. Locate* and remove surface mount diodes D512 (Receive Extend) and/or

D513 (Transmit Extend) from the bottom right side of the front case

PCB. If the green jumper wire has been cut previously, reconnect it at

this time.

7. Assemble the transceiver by reversing the steps above.  The unit

will reset when powered up.



* Diode D512 is oriented vertically and located at the bottom left of a

trio of SMC parts.  These three parts form a "Pi" like shape

approximately 1/4 of the distance from the right hand side of the front

PCB when the radio is placed face down, bottom of the unit towards

you.  D512 is the right "leg" of the "Pi".   D513 is to the right of

this group and slightly closer to the edge of the board it is also

oriented vertically, near the bottom left corner of a larger

rectangular component.  The green wire is to the right of the larger

component.



NOTE:this change also allows the transceiver to access a previously

suppressed menu, number 16.  This menu allows the unit to switch

between FM and AM Rxr detection in the 118 -136 mHz band.



Resulting Operational Ranges:



TX:136.000mHz - 173.995mHz,  400.000mHz - 469.995mHz

RX:118.000mHz - 173.995mHz, 320.000mHz - 469.995mHz, 800.000mHz -

823.9875mHz, 849.000 - 868.9875mHz, 894.000mHz - 949.9875mHz






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