Thanks Nancy and Jack.
Nancy, the plants are in clay pots on my windowsill with about 40
other plants (mostly orchids, but some Tillandsia, a couple African
violets and a couple jungle cacti).
The relative humidity isn't that great, but it's averages around 40%.
It fluctuates during spring, summer and fall with the weather outside
because the windows are open 24/7 during those seasons.

Jack, I'm gonna try mine on cork bark with a bit of Sphagnum like the
Soph. and Den.
I only get 65 -70% RH immediately after watering or if the humidity is
that high naturally.
But first I may try watering the Ang. more often - it's in very chunky
bark.
I can't have high relative humidity around the orchids since they're in
our living room window and there's no way I'm gonna get to hang plastic
around the plant area - that just won't fly. I don't think it's
healthy to have that much water vapor in the house?

I didn't mention Tolumnia in my post. I really like the plants,
however, it gets too cool for them in the window and there isn't enough
light away from the window. So I won't try them anymore. I may be in
a similar situation with the Ang. and Den. - I may just be unable to
provide conditions close enough to what they need to thrive.

Jack wrote:
Bob, I grow my angreacum calc. in both S/H and mounted on a stick, I
just moved 5 plants to the mounts, so far no problem, I recieved them
as compotted seedlings, they had overgrown the pot so I seperated them
out in to small S/H pots, 2-3 per a 3" pot. They were put in to
65-75F, moderate light (bright shade to 1-3 hr dapled sun) and 65-70%
humidity. All my calc. thrived, now I'm going to see how half of them
do on the sticks.

Jack