Yesterday felt fine all day but delayed at work, then had to go to grocery so not home til 715. Decided to go with 1:30 hour nap at that time, but from the past, could have stayed up til bedtime, probably. Didn't feel too tired. No caffeine except 4am coffee yesterday morning.
Nap 730 until I woke up on my own 2 minutes before the alarm-- REAL TIRED, SERIOUSLY SO. Therefore slept a bit more (this is a learning experience...

) and wound up sleeping on the couch til my husband was ready to turn in at 1030. To bed a bit hungry since hadn't been hungry enough to have dinner, so had a cup of warm milk, read a bit til 1130, left alarm at 4am.
4AM--woke to alarm (it kind of gives a shshsshshssh...sound which I like--it's a malfunction but wakes me up without any raucous noise and doesn't wake my husband up)--feel pretty good now but total sleep as below, so I guess I'm starting over here
11/13 Start, with first Nap) 630-800PM---1:30hrs
Nightsleep 1130-400AM--4:30hrs total ending in am: 6hrs
11/14 Day 1 Nap (++) 730-1030PM---3:00
Nightsleep 1130-400AM---4:30hrs// Total: 7:30hrs
Today's work schedule looks like (hopefully) will be shorter, so will try to find the best time for a 1:30 nap in the pm, and then back up to 1115-345 for the night. We'll see.
Does anyone know how important it is, on biphasic schedule, to have the nap part close to the same time every day or if that matters at all? Before, I was doing power naps as early as I could for general purposes, and also earlier or adding a second one any time I felt like it would do me good, i.e., I felt tired or sluggish.
At that time, I was sleeping 5:30 to 6:30 to sometimes 7 hours per night and doing well with a 30 minute pwr nap per day, sometimes two (so total 6:30 to 7:30 to 8 hrs/24). However, if I skipped the pwr nap, or stayed under 6:30 hrs for more than a 3-4 days, I'd get seriously fatigued.
My aim now is to see if, by going more biphasic than just adding a 30 minute pwr nap, I can (1) go on total 6 hours per 24 hours, because I think that adding and hour or two for music practice would be good, and (2) to experiment with the biphasic idea for more evening time awake to match up my pm sleeping with my husband's sleeping while keeping my early morning practicing intact (he's nightowlish, I'm early birdish)---naturally sleeping the evening away ain't the way to do that, but jus' learnin' over here...
All commentary and suggestions most welcome, I'll keep this log up in the hope that it's helpful to others' experience.
all best,
Ati