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Positive shift vs negative shift for servos.

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Old 11-15-2005, 10:39 PM
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Default Positive shift vs negative shift for servos.

Can Futaba servos be used with JR or Airtornics radios and vise versus? In other words, do the servos care what shift (pos. or neg.) the receiver operates on? I'm not asking about the connectors, which I know are slightly different, J vs. Z. With a file and an X-acto knife I can modify a J connector so it will fit a Z connector. I'm asking about the shift thing.
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Old 11-15-2005, 10:47 PM
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Default RE: Positive shift vs negative shift for servos.

for a short answer No the servos do not care about the shift of the radio .
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Old 11-16-2005, 12:10 AM
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Default RE: Positive shift vs negative shift for servos.

rccrazedman is correct servos don,t care what modulation shift is used by the Tx, Rx. To carry it a bit further with another common misconception, Tx's operating with FM (PPM) modulation type don't care if the Rx is a dual or single conversion type Rx.

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Old 11-16-2005, 06:17 AM
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Default RE: Positive shift vs negative shift for servos.

All current servos will work with all of the USA named brand receivers. With the airtronics application, some of the older servos moved the positive lead to the outside where the ground in most servos reside. Other than this slight difference, they all use the same format and are interchangable.
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Old 11-16-2005, 07:45 AM
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Default RE: Positive shift vs negative shift for servos.

JohnBuckner, To carry it even further; TXs don't care if there IS an RX! However, were you meaning that people thought if you had a dual conversion RX, you needed a PPM TX that was also dual conversion? I guess I'm unsure of what you were getting at. I don't want to put forward the idea that dual conversion is un-necessary! Maybe that is your point?!?
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Old 11-16-2005, 09:39 AM
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Default RE: Positive shift vs negative shift for servos.

I was just trying to point out that in the same way modulation shift does not matter to the servo, that the rx filtering (dual, single conversion) is not a compatability issue with the Tx.

That is just another common related misconception that seemed like a good idea to mention. It was not neccesssarily directed at you and it was certainly not intended as any kind of indication of suitability of either filtering method, they both have their place.

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