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Belden 8214 RG/8U

Oct 17th 2017, 14:43

WB4GVZ

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
Beldon 8214 Belden lists the voltage max. as 300 RMS. They do not from what I can find provide a max.RF voltage or power limit like you would find in the ARRL handbook for RG/8A. Does anyone have data for this coax?
Oct 17th 2017, 15:30

W1VT

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
The low loss RG-8/U coax sold by DX Engineering is very similar to this cable. The both have a foamed polyethylene dielectric and a 7 strand 11 AWG copper center conductor.
Here are the power specs for the DX Engineering product:
0.3 dB @ 5 MHz 5.4 kW 93 %
0.5 dB @ 10 MHz 4.1 kW 90 %
0.9 dB @ 30 MHz 2.2 kW 81 %
https://www.dxengineering.com/parts/dxe-8u/documentation
Belden 8267 has a much higher non-UL voltage breakdown of 3700 volts. Foamed cables typically have poor voltage breakdown ratings but are more popular due to their lower losses than solid dielectric PE cables like RG-213/U. The non-UL voltage of Belden 8214 is also 300V RMS, just like the UL rated voltage of 300 volts.

Zack Lau W1VT
ARRL Senior Lab Engineer

Dec 23rd 2017, 14:11

WA8NVW

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
From significant experience in the commercial land mobile field, I would focus a bit more on the SWR on the line and the BV of the connectors. In practice the threat will be a wayward whisker of braid straying close to the connector's center pin while a voltage max point is close to the connector. Remember that Vmax moves and SWR changes depending on your operating frequency, except when using a non-reactive 50 ohm load, which makes a terrible antenna. .

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