General Microwave Corp. 1981 Solid State Attenuators, Modulators, Phase Shifters

Lorch Microwave Short-Form Catalog 1995 Mixers Attenuators Filters

Kepco B-678 Power Supplies Product Catalog

Wavetek Wideband RF & Microwave Attenuators Catalog.

Kepco 8-678 Power Supply Product Catalog

Midwest Microwave Fixed Attenuators Calibrated Attenuator Sets Catalog.

Kepco Inc. 1967 Power Supplies Catalog B-678.

Midwest Microwave Attenuators, Waveguide, Couplers, Connectors, Adapters Catalog