|Subject:||Re: [Paparazzi-devel] Berg Receiver Mod|
|Date:||Wed, 17 Oct 2007 21:26:17 -0700|
|User-agent:||Thunderbird 126.96.36.199 (Windows/20070728)|
Sounds about right. Just as a side note I am almost SURE they are using some thin conformal coating on this receiver. It was difficult to get reflow and it gave off an odd odor. There also appear to be drops of something in between closely spaced components, etc.. I am not absolutely sure but it made me wonder. You are right that impedance-wise, this circuit could be less susceptible to the affects of moisture but then I had never considered moisture mucking with RF circuitry =) I will be abandoning the coating and already had some suitable lightweight shrink set aside I had used for building small battery packs. I also plan on using some surplus 1206 SMT ferrite chokes which I used to filter ~ 72MHz and coming up with a clever way to incorporate them in series with this wiring for a more bulletproof link. I used to use these in other RC products I designed and they made a dramatic difference to glitching.
On a somewhat related note. Would it be more suitable to use a 1/4" whip or something out of solid rod and make an antenna that could get perpendicular faster instead of running past every transceiver in th plane? Only thinking out loud here. I have a few of those tiny tuned antennas meant for parkflyers which turn the 30+" wire into a 4" antenna at the expense of a quoted 10% range as well.
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