Linear V switching.The stock reply is noisy power lines from switchers.This could cause jitter on the analog / digital conversion if care had not been taken to filter the analog supply. But I think it is a result of taking a stock vhf tx and adding the 2.4gig stuff - stepwise development, followed by If It Aint Broke, Dont Fix It thinking by the production people - like why stuff a 9,6v battery into a 3,3v system - cos its known to work and 9.6v packs and chargers are both mature technoligy - thus cheap.Go buy a 3.3v 1Amp linear regulator - £0.50 in ones, Switchmode £12.00 or so - retail, All mfg plants must have thousands of 3.3v linears so they will be effectivly free, and known to be very reliable with very very low Dead On Arrival fugures - great for production. Time will see improvements, but only if the is a real need.Just Good Enough is the best production model. Mike Edited By empeabee on 13/09/2010 01:43:37