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Old Jun 12, 2010, 05:11 PM
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Lawmate vs BOB Fox 700 Tx/rx combo which one has the 1160?


Closing the thread, all infos availble here
Last edited by iacei; Jul 23, 2010 at 10:16 AM.
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Old Jun 12, 2010, 10:12 PM
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ch7 on Fox is 1200MHz.
ch6 is 1160MHz.
Old Jun 13, 2010, 02:29 AM
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They also share ch3, 1080Mhz, for which there is an unique sweet transmitter.
Old Jun 13, 2010, 03:42 AM
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Originally Posted by RENATOA View Post
They also share ch3, 1080Mhz, for which there is an unique sweet transmitter.
Which is?


1080Mhz might be a good choice as I have 2.4Ghz RC Range problems....
Old Jun 13, 2010, 04:26 AM
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http://www.dinodirect.com/1-2GHz-Min...r-ESTX800.html

It is definitelly a winner... under 10 grams antenna included, CF card sized, the widest range of power choice, even at 5V is still spit some 200mW, powered from 2s works like a charm, from 3s a bit hot.
2.4GHz RC influence close to nothing, failsafe when under 5cm between antennas
Old Jun 13, 2010, 10:16 AM
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Quote:
Originally Posted by RENATOA View Post
http://www.dinodirect.com/1-2GHz-Min...r-ESTX800.html

It is definitelly a winner... under 10 grams antenna included, CF card sized, the widest range of power choice, even at 5V is still spit some 200mW, powered from 2s works like a charm, from 3s a bit hot.
2.4GHz RC influence close to nothing, failsafe when under 5cm between antennas
How do you select the frequency? What does this frequency description mean?
"Frequency Control: Can make all Kinds of frequency, adopt CPU frequency lock the wreath to control, with high frequency stability and non-adjust"
Old Jun 13, 2010, 11:04 AM
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It is single channel, hardcoded on 1080 Mhz.
There is a crystal inside, and a fixed 256 divider/counter, nothing programable.
You must change the crystal to 5MHz from 4.194 or so, how is now, to have 1280MHz, but a lot of PCB inductances still remains tuned on 1080MHz I guess.
See attached picture if you know a RF guru, already shared it with some and they are skeptical.
Old Jun 13, 2010, 12:46 PM
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Quote:
Originally Posted by RENATOA View Post
http://www.dinodirect.com/1-2GHz-Min...r-ESTX800.html

It is definitelly a winner... under 10 grams antenna included, CF card sized, the widest range of power choice, even at 5V is still spit some 200mW, powered from 2s works like a charm, from 3s a bit hot.
2.4GHz RC influence close to nothing, failsafe when under 5cm between antennas
Really interesting because my current BOB av combo TX just kills my RC, just had another shutdown RC Link today it was not more then 400m away!!!

Even worse, I tried with the same Tx a Car Fpv Project with FM RC link and it destroys the range from 200m to ....10m

Video is good but if I can't use any of my RC Toys with it..... no FPV
Old Jun 13, 2010, 12:54 PM
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So you kept the provided antenna?

And You got how much Range? Which configuration? (Patch antenna on Rx?)

We really should do a Unique Thread on 1.2Ghz Tx/Rx.... But I currently have no time for it but would be happy to contribute.

Renatoa, are you in the Mood? We could just ask ppl to reply giving their spec:

- Name of Tx / Rx
- Tx Antenna
- Rx Antenna
- Frequency Chosen
- RC Link (2.4 / FM)
- Link to buy
- Certified Range Result
- Pros & Cons:
Old Jun 13, 2010, 02:30 PM
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In the mood for what ?

About the 12ch receiver it seems we already have the verdict of VRFlyer guru, same class as Lawmate:
https://www.rcgroups.com/forums/show...5#post15246320
But more versatile because it covers from 910 to 1280MHz.
As far as I know there is only one 12 ch receiver.
You can get it the cheapest from DD for $35 the last price I remember, or in a combo with a decent 420TVL camera and 200mW Tx from HK, for $50.
There are also 8ch and 15 ch receivers, very scarce reviews or opinions.
ElectronicaRC sells an 8ch receiver, not sure if the same as sold by chinese shops.

The real challenge is to file transmitters
Old Jun 13, 2010, 02:39 PM
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Quote:
Originally Posted by MorrisM View Post
How do you select the frequency? What does this frequency description mean?
"Frequency Control: Can make all Kinds of frequency, adopt CPU frequency lock the wreath to control, with high frequency stability and non-adjust"
Ignore the bit about "making all kinds of frequency". The second bit is just a really bad translation and description of PLL (Phase loop locked).
Old Jun 13, 2010, 03:37 PM
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Originally Posted by RENATOA View Post
In the mood for what ?

About the 12ch receiver it seems we already have the verdict of VRFlyer guru, same class as Lawmate:
https://www.rcgroups.com/forums/show...5#post15246320
But more versatile because it covers from 910 to 1280MHz.
As far as I know there is only one 12 ch receiver.
You can get it the cheapest from DD for $35 the last price I remember, or in a combo with a decent 420TVL camera and 200mW Tx from HK, for $50.
There are also 8ch and 15 ch receivers, very scarce reviews or opinions.
ElectronicaRC sells an 8ch receiver, not sure if the same as sold by chinese shops.

The real challenge is to file transmitters

Exactly what I was thinking. Are you in the mood to make a unique Thread about 1.2Ghz Txs because there is so much crap on the market....
Old Jun 13, 2010, 11:43 PM
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Most people (including me) are going with the BOB system. It has been tested and works well for the most part. The RX is the real problem. It uses a 75 ohm "F" connector and the stock antenna is poor for just about every frequency.

The only solution to these issues is either to build your own antenna or buy an F to SMA converter and screw it onto the end of your RX unit and deal with the losses that incurs. I'm going with the converter and using a home made Yagi antenna.
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Old Jun 14, 2010, 01:12 AM
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Is a big deal to change the F connector to SMA ?
Old Jun 14, 2010, 11:39 AM
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Is a big deal to change the F connector to SMA ?
Some solder and that's it no?


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