The 75 ohm seamless 500/565/625 trunk cable is a high-quality cable designed for high-performance video transmission and broadband communication. The cable is mainly used in applications such as cable television networks (CATV), satellite television systems, closed-circuit television surveillance (CCTV), and digital video transmission, ensuring that signals maintain high quality and low loss during long-distance transmission.
• 500 Series: Suitable for short and medium distance transmission, with a small bend radius, easy to wiring installation.
• 565 Series: Combines transmission performance and cost-effectiveness, suitable for regular length trunk connections.
• 625 series: Optimized for long-distance, high-power transmission with improved electrical performance and mechanical strength.
Product Description
Construction
- Center conductor: 2.77±0.01mm Solid Copper/Copper Aluminum
- Dielectric: 11.43±0.05mm foam PE
- Outer Conductor: 12.70mm Aluminum Tube
- Outer Conductor thickness: 0.61mm
- Jacket: 14.22+0.05mm PVC / PE
- Jacket Wall Thickness: 0.76mm
- Messenger(optional): 2.77mm Steel
- Jelly/APD: Per Customer' Special Requirement
Characteristics
- Min. bending radius: 8.9mm(jacketed)
- Max. pulling tension: 68kgf
- Min. thickness strength
- Of messenger: 816kgf
- Impedance: 75+2Ohm
- Capacitance: 50+3nF/km, 15.3+1pF/ft
- Velocity of Propagation: 88%
Nominal D.C. resistance @20°C
- Copper clad:
- Inner conductor 4.43ohms/km
- Outer conductor 1.21ohms/km
- Loop 5.64ohms/km
Detailed Photos





Product Parameters
Construction Specification(mm) |
500 |
565 |
625 |
Inner Conductor |
Copper Clad Aluminum |
2.77±0.03 |
3.28±0.03 |
3.48±0.05 |
Dielectric |
Foam PE |
11.48±0.10 |
13.18±0.10 |
14.40±0.10 |
Outer Conductor |
Extruded Aluminum Tube |
12.70±0.10 |
14.35±0.10 |
15.88±0.10 |
Jacket |
Black PE |
14.22±0.20 |
15.88±0.20 |
17.40±0.25 |
Electrical Characteristics & Mechanical and Environmental Characteristics |
Impedance(Ω) |
75±2 |
75±2 |
75±2 |
Capacitance(pF/m) |
50.2 |
50.2 |
50.2 |
Velocity(%) |
87 |
87 |
87 |
DC Resistance Max@20ºC |
Inner Conductor(Ω/km) |
4.66 |
3.31 |
2.95 |
Outer Conductor(Ω/km) |
1.21 |
1.18 |
0.82 |
Loop(Ω/km) |
5.87 |
4.49 |
3.77 |
SRL min/VSWR max |
5-1002 MHz |
30dB/1.06 |
30dB/1.06 |
30dB/1.06 |
1002-1218MHz |
24dB/1.13 |
24dB/1.13 |
24dB/1.13 |
1218-1794MHz |
20dB/1.22 |
20dB/1.22 |
20dB/1.22 |
1794-2250MHz |
20dB/1.22 |
20dB/1.22 |
20dB/1.22 |
2250-3000MHz |
20dB/1.22 |
20dB/1.22 |
20dB/1.22 |
Jacket Tensile Min(MPa) |
10.3 |
10.3 |
10.3 |
Jacket Elongation Min(%) |
400 |
400 |
400 |
Min. Bending Radius(mm) |
88.9 |
127 |
114.3 |
Operating Temperature(ºC) |
-55~+85 |
-55~+85 |
-55~+85 |
Installation Temperature(ºC) |
-40~+60 |
-40~+60 |
-40~+60 |
Maximum Attenuation@20ºC |
Frequency,MHz |
dB/100m |
dB/100m |
dB/100m |
5 |
0.52 |
0.46 |
0.43 |
55 |
1.8 |
1.54 |
1.51 |
211 |
3.58 |
3.12 |
3.02 |
250 |
3.94 |
3.38 |
3.28 |
270 |
4.06 |
3.51 |
3.41 |
300 |
4.3 |
3.71 |
3.54 |
330 |
4.53 |
3.91 |
3.8 |
350 |
4.69 |
4.03 |
3.9 |
400 |
5.02 |
4.33 |
4.2 |
450 |
5.53 |
4.59 |
4.43 |
500 |
5.67 |
4.89 |
4.69 |
550 |
5.97 |
5.12 |
4.95 |
600 |
6.3 |
5.38 |
5.18 |
750 |
7.12 |
6.07 |
5.87 |
870 |
7.69 |
6.59 |
6.4 |
1002 |
8.32 |
7.12 |
6.92 |
1218 |
9.28 |
7.94 |
7.62 |
1500 |
10.68 |
8.92 |
8.74 |
1794 |
11.88 |
9.87 |
9.7 |
1800 |
11.91 |
9.89 |
9.72 |
2000 |
12.68 |
10.5 |
10.34 |
2200 |
13.44 |
11.09 |
10.95 |
2500 |
14.52 |
11.93 |
11.81 |
2700 |
15.22 |
12.48 |
12.37 |
3000 |
16.25 |
13.26 |
13.19 |
Company Profile




FAQ
1. What are the payment terms that you support?
Usually, we accept T/T, PayPal, Western Union, and Trade Assurance. You can select the terms of payment that are more convenient for you.
2. What about the lead time?
Usually, if there's stock, we ship the goods within 3~5 working days after the deposit is confirmed. If it is out of stock, the lead time depends.
3. How about the shipping?
When the package is small, we normally choose FedEx, DHL, TNT, UPS, and so on, while the goods have high weight and volume, we suggest using air or sea shipment.
4. How can I place an order?
(1) Negotiation is agreed upon for the product price and specifications.
(2) The Proforma invoice will be sent for confirmation.
(3) After the agreement on the proforma invoice, the customer makes the deposit.
(4) Manufacturing will be started as soon as the payment is confirmed by our bank.
(5) Ship out the goods within the agreed delivery deadline.
5. Can you do OEM for us?
Yes. If there is a certain order quantity, we can do OEM including printing, logo, and customized model for you.
6. How about the Warranty?
There are 12 months for the warranty.
While the warranty is not responsible for those broken by violence or updated with other brands.