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Old 10-07-2003, 05:05 PM   #1
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Power Supply??

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I have just purchased a PIC serial interface cable to hook my Tx up to FMS, my question is, do I need to use the Tx batts. to operate FMS, or is there another solution? I would hate to be flying and have to quit because my Tx batts are dead. Any ideas on an external power source??
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Old 10-07-2003, 05:21 PM   #2
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If you pull the crystal out of the TX your batteries should outlast your thumbs by quite a bit . I've "flown" for a solid day and still been at 90+ percent. You should always take it out anyway, as broadcasting with your antenna down can burn out the rf unit in your transmitter.


If you don't have time to do it right this time, how are you going to have time to do it again?
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Old 10-07-2003, 07:10 PM   #3
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Yo,, what he said
Busy is defined as your wife won't let you come out to play!!

Take the Dog approach

If you can't eat it or hump it,
P*ss on it and walk away
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Old 10-08-2003, 04:40 AM   #4
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Hi Shawn

I built the parallel interface for my Hitec Flash5 TX. When I plug the cord into the back of my TX it automatically disables the transmitting and the TX just becomes a standard input device. You still need to turn on the transmitter to use it. I have never drained my 600mah battery after a couple hours use. It takes me about 3 weeks to drain the battery if I use it every night. I also have never removed the crystal because like I said earlier the TX is disabled and the battery lasts.
If you are still worried you are transmitting you could try using your TX with the patch cord plugged in and see if it will operate the RX in your plane.

Yes as you can tell from my avatar I like FMS.

Good Luck


Flying quietly in Southern Ontario
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