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Old Yesterday, 08:01 PM
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I think someone cautioned against running a RC circuit without its antennae due to possible heating. Can't find the post now but I'm sure they had the similar issue.
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Old Yesterday, 08:36 PM
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Quote:
Originally Posted by Daedalus66 View Post
I've been using non-diversity (single antenna) Lemon receivers without satellites for over two years and never missed a beat. I wouldn't do it for a CF quad or bigger model but in a wide range of foamies they have been great.
That's good to know. What's your maximum flight distance without any problems? Actually this lemon receiver has two antennas sticking out in right and left directions. Don't know if yours are like this or not. I think it's considered dual antenna but it's not the same as my lemon diversity set up. Thanks
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Old Yesterday, 08:37 PM
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Quote:
Originally Posted by batballs View Post
I think someone cautioned against running a RC circuit without its antennae due to possible heating. Can't find the post now but I'm sure they had the similar issue.
That's normally true for all transceivers. An antenna mismatch can kill some output amplifier circuitry.

In this case I'd assume the diversity checker/switcher won't select an antenna that is not working, but that may only be true for incoming signal and it might transmit on all available antennas- it is a unknown risk (and why I'd borrow the antenna off another RX). Might be best to ask Lemon ....
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Old Yesterday, 11:10 PM
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What are the plugs used on the LemonRX DSMX Sats, are they JST XH? I want to solder the shrouded header to my Naze32 for easy removal.
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Old Yesterday, 11:58 PM
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Quote:
Originally Posted by batballs View Post
I think someone cautioned against running a RC circuit without its antennae due to possible heating. Can't find the post now but I'm sure they had the similar issue.
That's for transmitters not receivers.
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Old Today, 12:00 AM
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Quote:
Originally Posted by hate2crash View Post
That's good to know. What's your maximum flight distance without any problems? Actually this lemon receiver has two antennas sticking out in right and left directions. Don't know if yours are like this or not. I think it's considered dual antenna but it's not the same as my lemon diversity set up. Thanks

How far can you see a typical foamy? That far and more. One test I like to do is to fly out as far as I can still see to control the model, then point the transmitter antenna directly at it and fly for a couple of minutes that way. If I get any indication of control loss, I simply turn the transmitter so the antenna is broad side to the model.

An inadvertent test happened last summer when the Orange module in my transmitter had failed output transistor and was operating on its RF chip alone. From what I could find out this meant a power reduction to about 10%. At any rate, it caused a fair bit of glitching on the part of other receivers and one serious crash. But the Lemon receivers didn't seem to notice! By the way, this is one problem a ground range test won't show up, because such tests turn off the output transistor and put the chip in low power mode. To diagnose the problem you have to do a full power range test and potentially a fair bit of walking.

The Lemon receivers with two short (31mm) wires sticking out only have a single antenna. The other wire is a "reflector". It can be removed for a loss of 10-20% range. But make sure you don't touch the real antenna! There was a post with a picture very recently.
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Old Today, 12:02 AM
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Lemon Rx - DSM2 Receivers.

Quote:
Originally Posted by batballs View Post
I think someone cautioned against running a RC circuit without its antennae due to possible heating. Can't find the post now but I'm sure they had the similar issue.

Not a problem for receivers unless they send telemetry data (in which case they are also transmitters).
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Old Today, 12:48 AM
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JST-ZH 1.5mm pitch.

JST-XH is 0.1" (2.5mm) pitch. They are the ones used on most LiPos as balance connectors.
Quote:
Originally Posted by damouav View Post
What are the plugs used on the LemonRX DSMX Sats, are they JST XH? I want to solder the shrouded header to my Naze32 for easy removal.
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Old Today, 02:03 AM
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Originally Posted by jj604 View Post
JST-ZH 1.5mm pitch.

JST-XH is 0.1" (2.5mm) pitch. They are the ones used on most LiPos as balance connectors.
Thanks John,

I meant to type ZH, but working off tablet..

Cheers
Damian
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Old Today, 06:12 AM
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Quote:
Originally Posted by batballs View Post
I have and it works a treat. Yak54 powered by an os55 2stroke glow engine. I have a satelite for extra security against the carbon wing joiner and servo cables running to the tail.
I mounted it with soft foam to isolate vibration. Old school practice for all my glow model receivers.
Thanks for info i have ordered a dual diversity satellite to fit as well just to be on the safe side, my plane is a 56inch Chipmunk with a irvine 53 two stroke.
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Old Today, 06:31 AM
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Thanks Daedalus66 for your reply on using lemon rx on glow planes , I notice you have been using the lemon stablelizer on a Polaris, i built a standard size Polaris a few years ago and I'm still flying it off water with its high Alfa wing wobble lol it's one of the best planes I've ever flown for fun factor, so a lemon stablelizer will be on my next order, regards Dave
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