Theatre Design & Technology - Winter 1983 - 30

NEW PRODUCTS
Tough Blue 50 Frost. This unique diffusion material balances 3200 0 K. to nominal
daylight and sof1ens shadow. One 10" x 12"
sheet is included in he kit.
Rosco's Tungsten Correction Videokit is
available from Rosco dealers. For further information contact Rosco Laboratories, 36 Bush
Avenue, Port Chester. New York 10573; (919)
937·1300.

Video kit to Control Tungsten Light
A new, low-cost kit to control the Kelvin
temperature of tungsten lamps, has been introduced by Rosco Laboratories, Inc. The new
kit contains 10" x 12" sheets of five different
materials to raise the Kelvin temperature of
tungsten light sources. These materials are
widely used in film and televIsion production
when the basic source of light is daylight.
Daylight is nominally 5500° Kelvin. When
using tungsten as fill light it must be "boosted"
so its output can be balanced with daylight.
Tungsten light is approximately 3200° Kelvin
and a mix of unfiltered tungsten light and daylight will result in distortion in the skin tones and
an unbalanced film or video picture.
Until now. filters used for raising the Kelvin
temperature of tungsten light have been available only in 100-square-foot rolls at a cos exceeding $100 per roll. Rosco's Tungsten Correction Videokit now offers a range of such
materials for only 519.95. These are the same
materials for which Rosco was awarded an
Academy Award for technical achievement
A complete eight-page instruction manual
IS Included In each kit. Ii offers a number of
valuable tipS for better light control In film and
video for the professional practi loner.
The materials included in Rosco's Tungsten
Correction Videoklt. and the functions they perform. are'
Tough Blue 50. This is the basIc filter used
to raise the Kelvin empera ure of 3200 0 K.
tungsten sources 0 nominal daylight. 5500 0 K.
Three 10" x 12" sheets of Tough Blue 50 are
Included In he kit.
Booster Blue, Half Booster Blue and
Quarter Booster Blue. These filters raise Kel·
vin. respec Ively 900°.600° and 300° Two 10"
x 12" shee s 0 each 0 the three are Included
In the kit They are useful when tungsten amps
are operated at reduced voltage (resulting In
lovver Kelvin output) or for use as "boosters"
when the outpu is 00 'warm" for a deSired
look.

Thenlre Design &

Technolog~

Anchor Krete
Tamms Industries Company of Itasca, IlIi·
nois, has just introduced a new product under
the tradename Anchor Krete. It is a quick-setting
hydraulic compound for setting bolts, posts, rail·
ings, signs, machinery wherever there is the
need for a portable grout compound. Anchor
Krete actually expands in setting to form an exceptionally strong grip.
It is packaged in convenient 5Ib., 10 lb., 20
lb., and 50 Ib plastic containers and is simply
mixed in any clean container: you need only
add water. It can be mixed and applied in
freezing weather by using warm water. Anchor
Krete contains no material which promotes corrosion or other attack of any metal.
For further information, contact: Tamms Industries Company. 1222 Ardmore Avenue,
Itasca, IL 60143; (312) 773-2350.

Crown Introduces PZM 2.5 for
Directional Pickup
Crown International is introducing a new
microphone. the PZM:i. designed to improve
directional pickup. The new low-profile, mini·
mum visibility microphone combines a precisioncalibrated pressure capsule with a nearly invis·
ible corner boundary to achieve improved directionality of coverage. It effectively captures
and emphasizes sounds approaching from its
front while rejecting sounds from behind.
The PZM' 2.5 is recommended for applicaions such as theatre productions, conferences. and public speaking. The microphone
effectively eliminates audience nOise pickup
while providing excellent coverage for the user.
In operation. the microphone can be placed on
a surface such as a floor, table, or lectern and
aimed at the desired sound source. The corner
boundary deSign Increases the microphone's
sensitivity and actually Improves speech articulation through ItS specially tailored frequency
response.
The PZM' 2.5 is convenient to use. The
microphone plugs directly Into a 12 to 48 volt
phantom power supply. Includes a transformer
balanced. lOW-Impedance output and a perma·
nently attached 15-foot multi-directional cable.
Like all Crown Pressure Zone Microphones.
he PZM 2.5 IS engineered on the Pressure
Recording Process-·... a pnnclple of sound detection which uses the pressure zone at an
acoustic boundary 0 eliminate distortion.
achieve freedom from phase Interference. excellent clanty and extended reach.
For more Information contac Crown Inter·
na lonal Dept 25. 1718 II
Ishawaka Ro
Elkhart I 465 7

USITT \\'inter 1983

Porter-Cable Speedtronic Porta-Band
The first of Porter·Cable·s new generation of
portable electric tools controlled by micro·
processors has been introduced with the reo
lease of its new Speedtronic Porta-Band port·
able band saw. The torque and blade speed of
hiS saw is controlled by a micro-processor.
Using this new system. the operator may
pre-select he proper opera ing speed for the
material being cut. The micro·processor then
takes over. providing constant torque and blade
speed regardless of load. The motor runs more
efficiently. providing smoother and faster cuts.
Without danger of overload or overheating. A
digital display panel accurately Indicates actual
blade speed. The operator can set he speed
from 80 to 240 surface feed per mlnu e on the
push but on control panel.
The Speedtronlc Porta-Band IS programmed for "soft starts." When the tool IS
started. the micro-processor Increases the
electncal current from zero to running voltage
over a span of several milil-seconds resulting In
prolonged gear. blade. and mo or Ii e.
Porter-Cable's headquarters are located In
Jackson. Tenn. With Po er-Cable products beIng sold through Industrial dlstnbutors. Service
IS provided by 41 factory service centers
nationwide

Table of Contents for the Digital Edition of Theatre Design & Technology - Winter 1983