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Jan 06, 2008, 09:39 PM
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How to get a micro receiver for surface vehicles?


How can I use a micro receiver (the kind often used in parkflyers), for surface vehicles? It seems like the only micro receivers are on aircraft frequencies only. If possible, I'd like a really tiny 27 Mhz receiver, but I can't find a single one.

Also, could I buy a 72 Mhz micro receiver, then use a 75 Mhz crystal from the same manufacturer in it? Note that getting a 75 or 27 Mhz module for my transmitter isn't a problem. I can deal with reduced range, but would it work for the most part?

Thanks
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Jan 06, 2008, 10:04 PM
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ebill3's Avatar
Don't know your definition of micro, but Futaba calls the R153F a micro and is available both 27 mHz and 75 mHz.

Here is a smaller GWS 75 mHz RX.

A 75 mHz crystal in a 72 mHz RX won't work.

Bill
Jan 06, 2008, 10:32 PM
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Quote:
Originally Posted by ebill3
Don't know your definition of micro, but Futaba calls the R153F a micro and is available both 27 mHz and 75 mHz.

Here is a smaller GWS 75 mHz RX.

A 75 mHz crystal in a 72 mHz RX won't work.

Bill
Thanks, but that receiver is too big. I'm looking for a 27 or 75 version of this:

http://www3.towerhobbies.com/cgi-bin...?&I=LXHHR5&P=7
Jan 06, 2008, 10:50 PM
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ebill3's Avatar
Take the Futaba out of the case.
Jan 06, 2008, 11:08 PM
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If range is not an issue, and you can go 900MHz, this is about as small and light as it gets:

http://www.microflight.com/Online-Ca...Servo-Rx-w-ESC
Quote:
At less than 1 inch long, and 1.2grams weight, this lightweight servo capable receiver enables you to build lighter flying models. Pure Digital R/C link provides smooth and solid control. Compare with competitor receivers that weigh more than double.
A $40 Tx module is here:
http://www.microflight.com/Online-Ca...ox-Transmitter
Jan 07, 2008, 05:28 PM
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Or, use a Spektrum air TX and an AR6100 or AR6300. Fractionally more weight than the previous post and a tad bigger.
Jan 07, 2008, 06:58 PM
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Thanks for the suggestions, but I don't think they will work (as I haven't told you all the facts).

I'm hoping to keep my Futaba 8UHFS transmitter and only stay on the 27 or 75 frequencies. Also, I want to use the "standard" servo plugs. 900 and 2.4 Ghz frequencies are bad choices for underwater use.

Basically I'm trying to use my above mentioned transmitter for all my R/C needs, but it doesn't seem like it's possible, at least legally.
Jan 07, 2008, 08:18 PM
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I (with some help) found one!

http://www.robotmarketplace.com/mark...receivers.html
Jan 07, 2008, 09:15 PM
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ebill3's Avatar
I'm confused.

1.65" x 1.12" x 0.52" is smaller than 1.18" x 0.79" x 0.37" ?

From post #2 - http://epyaya.com/product_info.php?products_id=1338

Bill
Jan 07, 2008, 09:26 PM
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Quote:
Originally Posted by ebill3
I'm confused.

1.65" x 1.12" x 0.52" is smaller than 1.18" x 0.79" x 0.37" ?

From post #2 - http://epyaya.com/product_info.php?products_id=1338

Bill
Wait, that's for 6 channels, so I just disregarded the dimensions listed. But even if I didn't:

15 x 25 x 8.6 mm = 4P
20.0 X 30.0 X 9.5mm = 6P
Jan 07, 2008, 09:44 PM
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http://sombralabs.com/products_sl8.php $45 bucks. ANY channel on 72 or 75 since it is synth!
Jan 07, 2008, 10:10 PM
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ebill3's Avatar
Quote:
Originally Posted by petn7
Wait, that's for 6 channels, so I just disregarded the dimensions listed. But even if I didn't:

15 x 25 x 8.6 mm = 4P
20.0 X 30.0 X 9.5mm = 6P
Hey, that's fine - it is your project. I thought size was the determining factor, not channels.

Bill


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