Manufacturing & Test Capabilities

Spectrum Elektrotechnik designs, manufactures, assembles and tests almost everyting in-house, resulting in:

  • Short Ways
  • Fast Response Time
  • Short Delivery
  • Highest Quality


The Commitment

Building a superior product takes a big commitment: A commitment to hire motivated people, to use the finest equipment, and to uphold a standard of quality in every project. Spectrum Elektrotechnik GmbH has built its reputation on this same commitment. Quality is the basis for every employee, every procedure, and every product. It is reflected in the creativity of our organization and in the satisfaction of our customers. It ensures that Spectrum Elektrotechnik GmbH will continue to offer the highest standards in microwave components. Spectrum Elektrotechnik GmbH has earned a reputation for quality, but it is a reputation which requires constant attention. Through close communication with customers and repeated analysis of performance, we continually strive to strengthen our commitment, and as commitment is our policy, quality is our product.


The Philosophy

The management philosophy at Spectrum Elektrotechnik GmbH is based upon the creative concept of „Entrepreneurship“, the company within the company. A team of individuals, who act as a small company within the corporate structure and specialize in a particular product, manages each of our product families. Spectrum Elektrotechnik GmbH has adopted the entrepreneurial system for one simple reason: Customer satisfaction.

Responsible for the production of a single product, our entrepreneurs give your project undivided attention. No compromises are made, no details are overlooked. The team remains more alert to customer requirements and is able to maintain complete communication with the customer. And the result of complete communication is complete understanding. Understanding begins as the team studies the specifications. Goals are identified, a course is plotted. Questions are answered before they become problems; doubts are clarified before they are misunderstood. Then the team guides your project through design, manufacturing and testing, until we finally reach our ultimate objective: to deliver a quality product on time and within budget.


The System

A creative plan is useless if the details are ignored. At Spectrum Elektrotechnik GmbH, we have developed a system, which carefully monitors each step in the manufacturing process. Even before a single drafting pencil is raised, all specifications are closely scrutinized, including applicable military specifications. Then the documentation procedure will be started, an integral part of the monitoring process. Our integrated MRP System tracks each individual operation and piece part with full lot traceability. At Spectrum Elektrotechnik GmbH, we consider the quality of our documentation as critical as the quality of our product, and our methods reflect that integrity. Next, each product is defined with our manufacturing process sheet. This unique document provides a complete interpretation of the specifications, transcribed according to Spectrum Elektrotechnik GmbH manufacturing procedures.

This uniform interpretation of customer specifications streamlines production and reduces any margin for error because production personnel are never required to interpret specifications. Spectrum Elektrotechnik GmbH invests much time and attention to the intricacies of your project for one reason: detailed planning is our primary method of quality control. If we can solve problems before the project begins, we only need to concentrate on building quality into every step thereafter.


The Dedication to Quality

Quality is a high level of superiority, a degree of excellence, something that gives special worth and value to the product. Quality Products conform to Specification. Quality Products work much longer without defect or the need for repair than other products. Spectrum Elektrotechnik GmbH manufactures Quality Products. Quality is the commitment that Spectrum Elektrotechnik GmbH is built on. You can see it in the people as they steer every project from design to completion. You can see it in the methods they use to ensure a smooth course. And you can see it in the craftsmanship of the final product.

Quality is the commitment we make to our customers. And it‘s a commitment we‘ll never change. The first Quality Control Manual of the Spectrum Elektrotechnik GmbH was issued in 1982 and had been maintained and frequently revised since then. It was based on MIL-Q-9858A and MIL-I-45208A respectively. In August 2007 Spectrum Elektrotechnik GmbH has been approved for being DIN ISO 9001:2008 compliant.


The Products


Spectrum Elektrotechnik GmbH is a world leader in design and manufacture of state-of-the-art products in the frequency range of DC to 71.0 GHz. Offering thousands of different passive components of superior quality, listed in 8 different catalogues, totalling up to more than 2000 pages of product information, makes Spectrum Elektrotechnik GmbH the choice for the world. The product main range consists of the following:

  • Adapters, instrument grade, between- and in-series, Coax- and Waveguide-to-Coax
  • Cable assemblies, regular, phase matched, phase stable, and field replaceable
  • Cable cutting and stripping machines
  • Circulators and Isolators
  • Connectors, precision style, most series
  • Couplers
  • Duplexers
  • Gain Equalizer, coax and waveguide
  • Limiters
  • Phase Shifters, coax
  • Terminations, coax
  • Super components, coax and waveguide

The products of Spectrum Elektrotechnik GmbH are unique in many cases, not competing with mass production of the various suppliers, often engineered to very specific needs in complex programs. Spectrum Elektrotechnik GmbH is not a company trying to compete in price with mass production companies. Spectrum is rather the company supplying a product which usually has superior quality compared to most other suppliers. High Quality cannot sell at lowest price.


Quality Assurance

Although the Design is at the very beginning, Quality Assurance is involved already at that stage. Quality Assurance is always involved! Quality Assurance is always geared to the prevention of problems and is constantly working on process improvements. The well structured Quality Assurance of Spectrum Elektrotechnik GmbH assures that a product will be designed and built, meeting the highest expectations.



Only a good design can be the basis for reliable products of good quality. To design state-of-the-art products most economically and most efficiently, new techniques are needed. Spectrum Elektrotechnik GmbH added CAD already in 1984, being one of the first companies, installing a CAD design center, and using now Inventor.



Spectrum Elektrotechnik GmbH is using three-dimensional computer aided design (CAD), it decreases development time by allowing corrections to a product to be made early in the process. By giving engineering, manufacturing, marketing, and purchasing a look at the product early in the design process. Mistakes can be corrected and changes can be made while they are still inexpensive.

A mechanical prototype is often built as part of the product design process to allow our engineers to explore design alternatives, test theories and confirm performance prior to starting production of a new product. Engineers use their experience to tailor the prototype according to the specific unknowns still present in the intended design. Prototypes are used to confirm and verify consumer interest in a proposed design, or will attempt to verify the performance or suit ability of a specific design approach. A common strategy is to design, test, evaluate and then modify the design based on analysis of the prototype.



An almost perfect manufacturing process can be an assurance for a product of outstanding performance and repeatability. The best machines, the best and effective tooling and highly trained personnel are also fundamentals for manufacturing a Quality Product. Spectrum Elektrotechnik GmbH uses the most modern CNC-controlled machines and employs highly skilled and trained personnel.



The best material can be the basis for a dependable product of best quality. Spectrum Elektrotechnik GmbH only uses best materials. Only the best can be just good enough.

    corrosion resistant 1.4305 per DIN 17440 (QQ-S-763, class 303 or ASTM-A-582-80, 1.4404 DIN 71752 (316L)
    33-25 Cu-Be2Pb per DIN 17666 (QQ-C-530)
  • PTFE
    Fluorocarbon per DIN 52900 (ASTM-D-1457)
    sintered dielectric per in-house specification
    for high power connectors
    per in-house specification for hermetic connectors



The tightest tolerances are necessary for the best quality and highest performance.

In the specific areas as needed for best electrical performance Spectrum Elektrotechnik GmbH is using Tolerances of +/- 0.005 mm (0.0002 inch).


Process Control

Controlling the process means controlling every step that is involved in making the product. A good Process Control assures repeatability. At Spectrum Elektrotechnik GmbH every process is completely documented. With every work order a complete set of documentation is automatically issued, describing the manufacturing process in detail, step by step. Manufacturing sequences are always followed by inspection steps, assuring that a mistake is caught right away. And: The Process Documentation is immediately updated, whenever a change is implemented in the process.


Environmental Stress

Cables and connectors use a number of different materials with different behaviour, different thermal expansion. Cable and connectors are therefore being temperature cycled in a wide temperature range and up to 32 hours, depending on the product and the application. The thermal stress reduced the strain and makes the materials become predictable during normal operation.

Let’s have a look at the “simple” ageing process during manufacturing of a High Performance Cable Assembly:

  • Step 1:
    The raw cable is cut to length, as calculated necessary for the customer's order.
  • Step 2:
    Temperature cycling process of 4 x 4 hours from -54°C to +115°C (for special assemblies the temperature range may be widened, in special cases even from –65°C to +200°C).
  • Step 3:
    QA to record dimensions before and after temperature cycling.
  • Step 4:
    The interface is trimmed for the ferrule (outer conductor) and it is soldered.
  • Step 5:
    Temperature cycling process of 4 x 4 hours from -54°C to +115°C (for special assemblies the temperature range may be widened, in special cases even from– 65°C to +200°C).
  • Step 6:
    QA to record dimensional changes after temperature cycling, if any, record changes and decide whether they are acceptable and allowed in the specification.
  • Step 7:
    The interface is trimmed for the center conductor to be soldered to the cable center conductor and the connectors of the assembly are completed.
  • Step 8:
    Temperature cycling of 4 x 4 hours from -54°C to +115°C (for special assemblies the temperature range may be widened, in special cases even from –65°C to +200°C).
  • Step 9:
    QA to record dimensional changes after temperature cycling, record changes and decide whether they are acceptable and allowed in the specification.
  • Step 10:
    QA to test performance of the assembly, mechanically and electrically (Insertion Loss and Return Loss); go / no-go testing.
  • Step 11:
    The back body of the connector is secured with Loctite or similar, the marking sleeves are being put on.
  • Step 12:
    Assemblies for certain programs and those used in harsh environment undergo another Temperature cycling of 4 x 4 hours from -54°C to +115°C (for special assemblies the temperature range is opened up, from –65°C to +200°C).
  • Step 13:
    QA to record dimensional changes after temperature cycling, record changes and decide whether they are acceptable and allowed in the specification.
  • Step 14:
    QA to test performance of the assembly, mechanically and electrically (Insertion Loss and Return Loss)…………………
Note: The above is not a complete work sheet, it only shows a fraction, the part concerning the temperature cycling. The manufacturing process and the assembly and the testing consists of many more steps. For more complex components than cable assemblies a much more detailed work sheet is necessary. The work procedure for a gain equalizer may have more than 30 pages. The work procedure for a Duplexer consists of several hundred pages.



The best and aged connectors and the aged cable become a unique quality product, a cable assembly made by Spectrum Elektrotechnik GmbH. Every High Performance Cable Assembly will be shipped with complete test data, showing minimum Insertion Loss and Return Loss, or additional Phase as well, when requested. Commercial Assemblies will be tested on a go / no-go basis.

Contact Details
Spectrum Elektrotechnik GmbH
Olschewskibogen 1
80935 Munich

Mailing address:
P.O. Box 450 533
80905 Munich

+49 (0)89 / 354 804-0
+49 (0)89 / 354 804-90