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Old Feb 16, 2012, 09:35 AM
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capediablo83's Avatar
Ancona, Italy, Europe
Joined May 2009
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Help!
Strange pins in FUTABA FF7 40mhz module

Does anybody knows the meaning, the function of these three pins that yesterday i found in the TX circuit... In the picture u can see them in white just above the capacitor, above the connector underlined by the sheet.

Sorry for the quality of the picture... it's not mine!
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Old Feb 16, 2012, 10:06 AM
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thechannelmast's Avatar
martinsville indiana
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hi

v+,v-,signal but not in that order check with ohm meter for the + and -
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Old Feb 16, 2012, 10:43 AM
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Ancona, Italy, Europe
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Quote:
Originally Posted by thechannelmast View Post
v+,v-,signal but not in that order check with ohm meter for the + and -
wait wait wait.... i'm not talkin' about the one with the cables cutted... do u understand? Look above...

Or... I didn't understand? If we are talking about the same thing why futaba placed there another 3 pin connector with the same function as the other?
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Old Feb 16, 2012, 01:11 PM
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sorry

sorry I didn't understand but that is a good ???
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Old Feb 17, 2012, 03:09 PM
We want... Information!
Bruce Abbott's Avatar
Hastings, New Zealand
Joined Jan 2001
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They are used to generate fixed high or low modulation (by plugging a jumper into one side or the other) while adjusting the trim pots (P101, P102) which set the FM frequency deviation.
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Old Feb 18, 2012, 01:11 PM
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Quote:
Originally Posted by Bruce Abbott View Post
They are used to generate fixed high or low modulation (by plugging a jumper into one side or the other) while adjusting the trim pots (P101, P102) which set the FM frequency deviation.
Wow!
So... for us MODELLERS there's no utility!?
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Old Feb 20, 2012, 03:55 AM
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Bruce Abbott's Avatar
Hastings, New Zealand
Joined Jan 2001
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The 'utility' is that you can use it to check and/or fine-tune the frequency of your transmitter.

Other than that, not much. What were you hoping for?
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Old Feb 20, 2012, 01:50 PM
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Quote:
Originally Posted by Bruce Abbott View Post
The 'utility' is that you can use it to check and/or fine-tune the frequency of your transmitter.

Other than that, not much. What were you hoping for?
Nothing exactly... just fantasize something!
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