TB6 ~ What Coaxial Cable Should I Use?

Avtech recommends Pasternack Enterprises and Digi-Key as suppliers of 50 Ohm coaxial cables and adapters, due to their broad selection and rapid delivery. Several useful cable types from these suppliers are listed below:

Bulk Cable Type Application Diameter, Rigidity Outer Material Maximum Operating Voltage Maximum Power at 1 GHz Attenuation at 1 GHz per 100 ft $/ft (approx, bulk) Supplier & Part Numbers*
SR402FL maximum
performance,
high speed,
low loss
0.141"
re-shapable
semi-rigid
tinned
copper
1900 VRMS 450 W 12 dB $3.50 Pasternack PE-SR402FL-24 (bulk cable, no connectors)
SR405FL  high-speed,
low loss,
compact
0.085"
re-shapable
semi-rigid
tinned
copper
1500 VRMS 130 W 22 dB $3.50 Pasternack PE3867-24 (SMA male to SMA male)
T591RML  low loss,
low cost
0.195"
solid-core,
moderately
flexible
black
polyethylene
1000 VRMS 150 W 11.5 dB $0.60 Pasternack PE-T591RML-24 (bulk cable, no connectors)
RG316/U general use,
small &
rugged
0.102"
flexible
clear
propylene
1200 VRMS 160 W 30 dB $0.60 Digi-Key: Johnson Components 415-0029-024 (SMA male to SMA male)
RG174A/U general use,
high loss,
low cost
0.100"
flexible
black
PVC
1500 VRMS 16 W 31 dB $0.17 Pasternack PE3353-24 (SMA male to SMA male)
RG58C/U general use,
medium loss,
lost cost
0.195"
flexible
black
PVC
1900 VRMS 44 W 20 dB $0.22 Pasternack PE3067-24 (BNC male to BNC male)
Pasternack PE3369-24 (SMA male to SMA male)
RG214/U high voltage 0.425"
flexible
black
PVC
5000 VRMS 190 W 9 dB $2.20 Pasternack PE3117-24 (SHV plug to SHV plug)

 * part numbers given for 24 inch (60 cm) length. Confirm the part number and specifications with the supplier. This table is only a general guide.

SMA connectors are recommended for very-high-speed applications. BNC connectors are recommended for lower-speed, more general-purpose applications.

For applications requiring the use of transmission lines with low characteristic impedance (<< 50 Ohms), consider using the Avtech LZ series, or connecting several 50 Ohm cables in parallel.

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