RE: Spektrum DX7 voltage
What you may be seeing is that your Tx pack may be getting weak.If you setup a model and are playing with the programming and havent actually bound it to a DSM2 Rx it may be operating in original DSM mode.DSM is alot more power hungry on the Tx than DSM2.If the pack is less up to the task and it is in DSM mode it may suck the voltage down quite a bit more rapidly.This is likely why you see a difference in power use from one memory compared to another.The pack may be handling the DSM2 load reasonably adequately but just isnt up to the task of feeding the DSM demand anymore.