Dave Goncalves wrote:

This is a pretty special job, a custom stepped coil form with seperate
litz windings on each.
I don't think Miller has what I'm looking for. If it came to replacing
the current choke with another model, I've already got several in the
junkbox. What I'm looking for is an exact match to fit in the old
location. The amplifier I'm working with has a very nice period layout
I'm trying to preserve.

But, what the hay, see below:

The characteristics of the R-175 choke a

Voltage breakdown to metal base 12,500 volts.
D.C. Resistance 6 ohms.
D.C. Current Rating 800 ma.
Inductance 225 microhenries
Distributed Capacity 0.6 micromicrofarad.

Okay, this is all easy to do, EXCEPT for that breakdown voltage rating.
A 2116-H will actually have substantially _less_ DC resistance, and
really only slightly lower Q. But the breakdown voltage is probably
higher. The litz wire design is basically to improve the filter Q,
but these days with modern ferrites you can make coils of the same value
with fewer turns, which reduces the necessity.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."