Edgeflyer Posted March 3, 2019 Share Posted March 3, 2019 I have 2 Graupner C341 servos, in a glider. They both worked fine with a 35MHz JR rx. I think they were made by JR. Similar to Hitec Hs 81s. They both respond fine on a servo tester. But when connected to either a Graupner GR12 rx or a Spektrum 610 rx, both 2.4GHZ, they have no response at all. If another digital servo is connected to the rx it works fine and the analogue servos occasionally twitch when the digital operates on an adjacent channel. Can anyone explain this? Are some analogue servos incompatible with modern rxs? Quote Link to comment Share on other sites More sharing options...
Former Member Posted March 3, 2019 Share Posted March 3, 2019 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Mr.B. Posted March 4, 2019 Share Posted March 4, 2019 I had analogue servo twitching issue with an AR9030, updating the firmware fixed it. Spektrum don't put this in the manual. Edited By Mr.B. on 04/03/2019 18:35:48 Quote Link to comment Share on other sites More sharing options...
Former Member Posted March 5, 2019 Share Posted March 5, 2019 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Edgeflyer Posted March 5, 2019 Author Share Posted March 5, 2019 My Graupner rx has a programmable frame rate, either 10 or 20ms. I have it set to 20ms. Still no response from the (JR) graupner servo. The same with a Spektrum 610 rx. Quote Link to comment Share on other sites More sharing options...
Chris Bott - Moderator Posted March 5, 2019 Share Posted March 5, 2019 Signal boosters do exist from various suppliers. Here's one example. Quote Link to comment Share on other sites More sharing options...
Stephen Smith 14 Posted March 5, 2019 Share Posted March 5, 2019 Posted by Chris Bott - Moderator on 05/03/2019 13:33:30: Signal boosters do exist from various suppliers. Here's one example. Would be great if it wasn't discontinued Quote Link to comment Share on other sites More sharing options...
Chris Bott - Moderator Posted March 5, 2019 Share Posted March 5, 2019 Posted by Stephen Smith 14 on 05/03/2019 18:40:55: Posted by Chris Bott - Moderator on 05/03/2019 13:33:30: Signal boosters do exist from various suppliers. Here's one example. Would be great if it wasn't discontinued Well it was meant to show that there is such a thing. Google isn't too hard to use, what about this one? Quote Link to comment Share on other sites More sharing options...
Sparks Posted March 5, 2019 Share Posted March 5, 2019 Hi Phil, Have you checked what servo frame rate your transmitter is set up for? On my Spektrum DX8 you can set a frame rate of 11ms or 22 ms. The older Analogue Servos require the slower frame rate of 22ms. The newer Digital servos are happy with frame rates of 11ms or 22ms, but give a faster response with a frame rate of 11ms. On the DX8, the frame rate setting can be found in the 'system setup' menu. Quote Link to comment Share on other sites More sharing options...
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