I bought my first V6 in March '13, installed it with the factory supplied harness and it tested OK in the hangar vs another airplane. First flight from KANE (tower controlled field) was this past July; mic gain set waaay to high. Re-set mic gain (I am using a Stratus 50D headset) but on several subsequent flights, Rx would cut out intermittently. Radio display looked normal when this happened, and all other avionics on the same bus operated normally. Cycling power off and on instantly restored radio function (Note: the V6 has no ON/OFF switch, but I wired a dedicated sw on the panel). When I say Rx 'cut out', I mean that reception ceased; on multiple occasions after cycling power, tower would indicate they had been trying to contact me.
MGL sent me a replacement which worked fine for a few flights, but it too would cut out every once and a while, tho (subjectively) less so than the first radio. After about 10 hrs on this second unit, I installed a large filter cap (9500 μF 35V) across the power leads to the V6 and this seems to have fixed the intermittent 'cut out' issue.
I now have about 50 hrs on the airplane. The V6 is a very small but feature rich unit, and it seems to play well with my Dynon SkyView (can tune the V6 from SkyView, and Aux input receives audio warnings/annunciations from SV). Intercom seems to work OK, though I have flown it only a few times with a passenger.
Getting the mic gain set correctly, though, is really critical. If it is too high, Rx/Tx is garbled; if too low, then tower reports Rx intermittent or scratchy reception. I did not find the instructions for setting mic gain all that useful. Never experienced any ignition or alt noise.
While my early experience was pretty frustrating, I will continue with the V6 for now
Warren
RV7--N671CW
Minneapolis Crystal KMIC
2014 Contribution