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Classic starquad UP SPOFC microphone cable - see prices
Van Damme Classic starquad is used for balanced analogue audio applications in
areas of high electronic interference. It has better rejection of EMI (electromagnetic
interference) and RFI (radio frequency interference) than conventional twisted
pair microphone cables, and is the analogue standard for the outside broadcast
industry. In addition the tightly packed construction and 98% coverage braided
screen used by Van Damme for this cable make for a mechanically excellent cable
more than capable of standing up to the rigours of OB use.
Materials
This cable now uses a mixture of Ultra Pure Silver Plated Oxygen Free Copper
and Ultra Pure Oxygen Free Copper for its conductors. As with the ultra pure oxygen
free copper used in other Van Damme Cables ‘solderability’ and conductivity are
much improved. The additional advantage of UPSPOFC is that silver is approximately
5% less resistive than copper. High frequencies, which gravitate to the outside
of the conductor due to the skin effect, are conducted slightly more efficiently
than the lower frequencies which tend to saturate the UPOFC conductor. In addition
silver is less susceptible to corrosion than copper and so the plating offers
a protective barrier between the conductor and the insulation or free air.
Cross-linked polyethylene (XLPE) is used for the conductor insulation. Although
considerably more expensive than conventional polyethylene it offers distinct
advantages over other insulation materials. XLPE has a low dielectric constant
(2.2 at 1KHz), essential for minimising high frequency signal losses, and is stable
at high temperatures. This temperature stability ensures that the insulation material
resists shrink back during the soldering process. It has good abrasion and stress-cracking
resistance yet remains flexible down to - 40 degrees C. XLPE also is less environmentally
damaging than other insulation materials as it releases carbon dioxide and water
during combustion with no halogen emission. The term starquad refers to the construction
method used for this type of cable.
Four insulated conductors are tightly twisted together with natural textile fillers
and overlaid with an anti-static paper separator. The overall braided screen uses
128 strands of 0.10mm tinned copper giving 98% coverage and unsurpassed screening
and mechanical strength. The overall jacket is anti abrasion PVC/neoprene composite
which is tough yet flexible even in sub zero temperatures. The four inner conductors
of this cable are colour coded white (2) and blue (2). To maximise the cable’s
resistance to interference the 2 white conductors should both be connected to
the hot (+ve) signal and the 2 blue conductors should both be connected to the
cold (-ve) signal.
Applications
• Microphone and line level analogue balanced audio use, especially longer runs
• For use in electrically harsh environments (proximity to lighting circuits
and rheostats for example) and mechanically harsh environments
• The standard microphone cable for the outside broadcast industry
• 10 colours available for application specific coding
Mechanical pair specifications
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Conductor |
Material |
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Bare silver plated ultra pure free copper wire |
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Stranding |
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7 x 0.08mm |
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Material |
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Bare ultra pure oxygen free copper wire |
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Stranding |
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32 x 0.08mm |
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Insulation |
Material |
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Cross linked polyethylene (XLPE) |
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Diameter |
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1.35mm ± 0.10 |
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Colour coding |
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2 x white 2 x blue |
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Screen |
Type |
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128 x 0.10mm braided tinned oxygen free copper wire |
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98% optical coverage |
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Electrical pair specifications
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Description |
Unit of measurement |
Actual result |
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Resistance |
Ohm/km |
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Conductor |
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93.2 |
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Shield |
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23.5 |
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Insulation |
Mohm/km |
<1200 |
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Capacitance |
pF/m |
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Core to core |
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50 average |
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Core to shield |
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94.6 |
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Test voltage |
Volt |
1000v/min no cracks |
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Overall jacket properties
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Jacket |
Material |
Flexible PVC/neoprene composite |
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Overall diameter |
6.00mm |
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Tensile strength |
0.85Kg/mm2 |
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Elongation |
>250% |
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Heat shock |
120 °Cx h no cracks |
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Temp Range |
-10 to +60 degrees C |
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Cable |
Cable Weight kg/km |
65kg |
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Stock code, weights and dimensions
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Stock code |
Description |
RAL number |
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268-026-000 |
Classic quad mic cable, Black |
9005 |
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268-027-060 |
Classic quad mic cable, Blue |
5002 |
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268-028-020 |
Classic quad mic cable, Red |
3001 |
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268-034-050 |
Classic quad mic cable, Green |
6001 |
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268-036-080 |
Classic quad mic cable, Grey |
7031 |
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268-038-040 |
Classic quad mic cable, Yellow |
1021 |
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268-048-090 |
Classic quad mic cable, White |
9010 |
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268-050-030 |
Classic quad mic cable, Orange |
2009 |
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268-052-010 |
Classic quad mic cable, Brown |
8012 |
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268-054-070 |
Classic quad mic cable, Purple |
4004 |
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