Wonky Telemetry Voltage

[ron evans]

Afternoon all. Back last year a mate picked up a couple of Spektrum AR 410 RX for me at a model show. When I got them home I did a quick check that they worked and put them in a goody box for future use.

I was fettling an old glider recently when I thought to use one of the 410 rx as it had telemetry voltage built in, handy for a long day on the slope.

With it all set up I was surprised to see the TX was reading 4.6V, although the battery had been charged.

I plugged in a V meter into the RX and that read 5.4V.

Next I tried the other 410 RX and that displayed the correct voltage. I also used another TX with the same results.

The RX is now out of guarantee, but it's no big deal really as the RX otherwise works ok.

I just wondered if anyone had a similar experience.

Ron

 

Edited September 21 by ron evans

[MattyB]

What Tx do you have? Maybe start by reading the telemetry section of the TX manual. I know it’s absolutely possible to calibrate these voltage readings up or down on other systems such as frsky, but I’m not familiar with the Spek functionality in this area. Sorry!

Edited September 21 by MattyB

[ron evans]

Hi Matty, I have a DX7c and DX9 and you're right of course, if all else fails, read the instructions.😊

I've now had a look through and it just seems to be plug & play with no option to calibrate RX voltage.

I think I will discharge the pack down to 4.4V and see what is displayed. A bit of a bodge, but it should give an indication of low battery.🤞

Ron