6 1/8" EIA male bulkhead mounting to 52-120 SMS clamp adapter product photo Front View L
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6 1/8" EIA male bulkhead mounting to 52-120 SMS clamp adapter


SPINNER adapters offer outstanding electrical and mechanical properties

Adapters are used to connect transmission lines with different interface sizes (so-called inter-type or between-lines adapter) or within one size but different interface genders (so-called within-type or in-line adapter).

SPINNER high frequency adapters are optimized for quality and performance and are designed for the lowest possible reflection factors. The outstanding electrical and mechanical properties, the simple installation and the high reliability make SPINNER high-frequency adapters one of the most efficient and cost-effective transition connectors on the market. Precision adaptors with RF quality grade 0 are available upon request.

The SPINNER 6 1/8" EIA male bulkhead mounting to 52-120 SMS clamp adapter ensures optimal performance for signal transmission between transmitter and antenna in broadcast stations.

Outstanding RF characteristics, best possible passive intermodulation and VSWR

A 6 1/8" EIA male bulkhead mounting to 52-120 SMS clamp adapter enables you to reliably transmit radio-frequency signals in the frequency range from DC to 800 MHz.

The adaptor offers a transition from interface 6 1/8" EIA male to interface 52-120 SMS clamp. The connector has a straight direction.

Bulkhead mounting connectors enable wall mounting e.g. on housings. 1-hole connectors are inserted into an appropriately prepared notch or bore on a housing wall and fastened there, e.g. by screwing.

Coaxial flange connectors, generally known as “EIA flanges”, are connected by a coupling element. The flange connector system complies with international standards EIA STD RS-225, 339 IEC, DIN EN 122150 and MIL-F 24044. The EIA flange connectors are excellently qualified suited for pressurized systems and for outdoor installations. 6 1/8" EIA connectors are used to link two elements of a rigid or semi-rigid high performance coaxial transmission line for radio frequency signals. Typically, these are operated in systems for very high power transmission (from kW to MW), e.g. in DAB, DVB or FM broadcast systems or in high-energy applications in research facilities (particle accelerator, plasmatron).

The SPINNER quick clamp system called SMS is based on the international rigid line standards like EIA STD RS 225, 339 IEC and DIN EN 122150. The different parts are connected by coupling elements and fixed together with clamps. The advantage of the SMS system is that the customer can easily cut the rigid line to length on site, without flaring or brazing. The assembly is therefore very simple and no special tools are required. The SMS system is provided solely for indoor installation.

RF characteristics

Number of interfaces:
Interface type:
6 1/8" EIA male (50 Ω) per IEC 60339-2
52-120 SMS clamp (50 Ω)
Port / path designation:
Port 1: inner face
Port 2: outer face
Interface type remark:
Port 1: Innenseite
Port 2: Außenseite
Interface direction:
with built in coupling element
Mounting type:
Port 1: bulkhead mounting
Frequency range:
DC to 800 MHz
Frequency band:
Band 4/5, Band 3, Band 1, Band 2
VSWR, max.:

Mechanical characteristics

Weight, approx.:
6.2 kg
35.0 mm
220 mm

Environmental conditions

Environmental conditions:
for limitations see "Environmental Conditions for Broadcast Products" TD-00060

Further remarks

• fixed adapter with coupling element
• for 50 ohms systems
• protection caps included
• for outdoor application
Customs tariff number:



Product data sheet – 837305 – CB-L-212-DS.pdf