Up: Corning Pyrex
Radio Insulators¹
3 of 12
|
|
| |
PYREX Insulators Have Proven Their Worth
The ease with which radio waves traverse many solid
substances capable of obstructing the passage of sound, light,
and heat waves, is evidence of their elusive qualities.
Effective results in radio transmission,
and to a more limited extent in the collection of radio energy
by antennae for broadcast or message reception, depend on ability
to confine the radio current to the antennae and their associated
conducting systems.
Leakages not only cut down the transmission
range of a broadcasting station, but they may also affect quality
through retransmission from adjacent conductors when the separation
is dependent on imperfect insulating materials.
In the case of antennae for commercial,
amateur and broadcast reception the total energy collected is
extremely small, and it is important that all the available energy
be delivered to the detector stage.
Insulation is a vital factor in the field
of radio communication, and as insulators frequently have to be
placed in inaccessible positions it is essential that the material
used in their construction possess permanent insulating
characteristics, and maintain its effectiveness when exposed to
fogs, soot, dirt, industrial fumes and rain.
PYREX Radio Insulators meet these
requirements.
PYREX Radio Insulators Conserve Radio Energy
PYREX Radio Insulators are made from a
special glass, developed by Corning Glass Works, which possesses
an unusual combination of electrical, mechanical and chemical
properties, making them an effective barrier against leakage and
eddy losses.
The power loss of the glass from which
these insulators are made is lower than that of any material now
available for radio insulation with the possible exception of pure
fused quartz. The phase angle difference is 0.16 degrees (30,000
cycles) and the dielectric constant 4.48 (30,000 cycles).
The surface conductivity of this glass is
so low as to be practically negligible.
The power factor is 0.28% (30,000
cycles).
The dielectric strength of 35 kv. per 100
mil thickness is higher than that of the best grades of porcelain,
and as the specific gravity is low, PYREX Radio Insulators have
the advantages of light weight combined with mechanical strength.
Their flashover values are uniformly higher
than called for by the specifications of the A. I. E. E.
|
|
|