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Messi & Paoloni STEALTH-FLEX 7 /.300"
Low-loss 50 ohm coax with twin reactive braids, full copper foil screening and a matte military green jacket for demanding portable and field installations.
Choose your cable length and connector combination and let us build the lead for you.
Messi & Paoloni STEALTH-FLEX 7 /.300" is a rugged low-loss 50 ohm coaxial cable developed for installations where both RF performance and repeated physical handling matter.
Its distinctive construction uses a 19-strand copper centre conductor, physically foamed polyethylene dielectric, full copper foil screen and two separate reactive braids. This gives the cable excellent screening performance while helping it withstand repeated winding, unwinding and deployment in the field.
The outside is finished with a matte military green PVC jacket, helping the cable blend into grass, vegetation and other outdoor environments where a conventional black cable may be more visually obvious.
Two separate 144-wire braids provide a durable outer conductor designed for repeated field deployment.
Low-loss construction with a triple-layer physically foamed polyethylene dielectric.
Copper foil and twin braids provide excellent screening between 100MHz and 2000MHz.
Matte military green PVC provides a discreet finish for portable and outdoor installations.
Designed for Repeated Field Deployment
M&P developed STEALTH-FLEX 7 around the mechanical demands of portable and field operation. The twin braid construction is intended to cope with the repeated winding and unwinding that a permanently installed cable would rarely experience.
The first braid provides approximately 83% coverage and the second approximately 80% coverage, with 144 copper-clad aluminium wires in each layer. Beneath them is a 100% copper foil screen with a protective PE layer.
This combination provides both mechanical reinforcement and excellent protection against unwanted electromagnetic interference while keeping the cable reasonably flexible.
Low-Visibility Green Jacket
The matte green outer jacket is not simply cosmetic. It is intended to make the cable less visually conspicuous when laid across grass, woodland or other outdoor terrain.
M&P positions STEALTH-FLEX 7 for demanding portable, tactical and professional communications applications where cable may need to be deployed some distance between the radio equipment and antenna.
The green jacket also makes STEALTH-FLEX 7 a very practical choice for amateur radio installations where coax needs to cross a garden without standing out visually.
Where STEALTH-FLEX 7 Works Best
Designed for cable that will be regularly deployed, recovered, coiled and transported.
Matte green jacket is considerably less visually intrusive than conventional black coax across lawns and vegetation.
Twin braid and copper foil construction makes it particularly attractive where strong screening is a priority.
M&P Cable Length Guidance
M&P provides the following guidance for transmitting applications. These figures are recommendations for selecting a suitable cable size rather than absolute cable length limits.
| Frequency | Excellent | Good | Guidance |
|---|---|---|---|
| 14MHz | Up to 60m | Up to 100m | Consider larger coax above 100m |
| 28MHz | Up to 50m | Up to 75m | Consider larger coax above 75m |
| 50MHz | Up to 35m | Up to 50m | Consider larger coax above 50m |
| 144MHz | Up to 15m | Up to 25m | M&P recommends 10.3mm coax for longer runs |
| 430MHz | Up to 10m | Up to 15m | Consider larger coax above 15m |
| 1296MHz | - | Up to 5m | Consider larger coax above 5m |
| 2400MHz | - | Up to 3m | Consider larger coax above 3m |
Cable Construction
- 19 x 0.38mm stranded copper inner conductor
- 1.9mm overall inner conductor diameter
- Triple-layer physically foamed polyethylene dielectric
- 100% copper foil screen with protective PE layer
- First braid with 144 copper-clad aluminium wires and approximately 83% coverage
- Second braid with 144 copper-clad aluminium wires and approximately 80% coverage
- Matte military green PVC outer jacket
- 7.65mm overall cable diameter
- 83% velocity factor
STEALTH-FLEX 7 uses a PVC outer jacket. M&P does not specify this model as a direct-burial cable. For permanent underground installation, use a cable specifically designed and documented for direct burial.
STEALTH-FLEX 7 Technical Specifications
General
| Official Model | STEALTH-FLEX 7 /.300" |
| Nominal Impedance | 50 ohms ±3 at 200MHz |
| Overall Diameter | 7.65mm ±0.15mm |
| Velocity Factor | 83% |
| Capacitance | 75pF/m ±2 |
| Screening Efficiency | Greater than 105dB, 100 to 2000MHz |
| Operating Temperature | -40°C to +60°C |
| Net Weight | 5.4kg per 100m |
| Maximum Peak Power | 8000W |
| Spark Test | 4kV |
Construction
| Inner Conductor | 19 x 0.38mm copper wires |
| Inner Conductor Diameter | 1.9mm ±0.15mm |
| Dielectric | Triple-layer physically foamed polyethylene |
| Dielectric Diameter | 5mm ±0.05mm |
| Foil Screen | 100% copper foil with applied PE layer |
| First Braid | 144 copper-clad aluminium wires, approximately 83% coverage |
| Second Braid | 144 copper-clad aluminium wires, approximately 80% coverage |
| Outer Jacket | Matte military green PVC |
| Inner Conductor Resistance | 7.3 ohms/km |
| Outer Conductor Resistance | 12 ohms/km |
Minimum Bend Radius
| Repeated Bending, Up To 15 Bends | 68mm |
| Single Bend / Choke | 34mm |
Structural Return Loss
| 0.3 to 600MHz | Greater than 28dB |
| 600 to 1200MHz | Greater than 22dB |
| 1200 to 2000MHz | Greater than 18dB |
Attenuation at 20°C
| Frequency | Loss dB/100m |
|---|---|
| 1.8MHz | 1.1dB |
| 3.5MHz | 1.3dB |
| 7MHz | 1.7dB |
| 14MHz | 2.2dB |
| 28MHz | 3.0dB |
| 50MHz | 4.0dB |
| 144MHz | 6.9dB |
| 430MHz | 12.3dB |
| 1296MHz | 22.3dB |
| 2400MHz | 32.3dB |
| 3000MHz | 36.2dB |
| 6000MHz | 55.3dB |
| 8000MHz | 68.4dB |
Continuous Power Handling at 40°C
| Frequency | Maximum Power |
|---|---|
| 1.8MHz | 4572W |
| 3.5MHz | 3393W |
| 7MHz | 2714W |
| 14MHz | 1974W |
| 28MHz | 1448W |
| 50MHz | 1086W |
| 144MHz | 629W |
| 430MHz | 353W |
| 1296MHz | 195W |
| 2400MHz | 134W |
| 8000MHz | 63W |
Shipping:
We have several shipping options for our products, including next-day and Saturday/Sunday delivery for certain items. Please see these options at checkout.
Returns:
If you have any equipment that needs to be returned to Martin Lynch & Sons, please fill out the form below:
Upon receipt of goods you have 14 days to return goods however the goods must be returned in original packaging and care must have been taken with the goods you wish to return. Under distance selling regulations you are not entitled to any refund on carriage charges or modification charges made at your request. Large items cannot be returned if they have been assembled, unless faulty.
Warranty Terms and Conditions
Outside of the 14 faulty return period, returned items cannot be accepted, unless covered by manufacturer's warranty. We will repair as much as possible on site however in exceptional circumstances products may have to be returned to the manufacturer of distributor.
For repairs/replacements under manufacturer’s warranty for any item please download a ML&S return form from the link above and return to ML&S with the faulty product.
International Warranty information
Warranty service for items we sell is available in the U.K. only, unless otherwise noted. It is your responsibility to pay freight for returned items to the U.K. and back to you for desired warranty coverage. All of our NEW products come with a minimum 12 month warranty, (Yaesu & Icom 24 months), with up to 90 days on second-hand equipment. Items returned for service must state "returned goods for repair" on the return air waybill or U.K. import customs duties apply and will be added to your invoice. For more info about returning items please contact our customer help desk, [email protected]