Vintage BUD Radio LF-601 Variable Low-Pass Filter with SO-239 RF Connectors
$39.95
Vintage BUD Radio Inc. LF-601 variable low-pass filter housed in a long shielded metal enclosure. The front panel provides five adjustable filter sections labeled A through E. Sections A, D, and E are marked for variable impedance adjustment, while sections B and C have numbered adjustment positions. The unit has SO-239 female RF connectors at the input and output ends for connection to coaxial radio and RF test equipment. Intended for use in an RF signal path to reduce unwanted higher-frequency energy, harmonics, and interference while allowing lower-frequency signals to pass. Suitable for vintage amateur-radio stations, RF experimentation, transmitter testing, collector displays, and restoration of period communications equipment. Historical Note: BUD Radio Inc. of Willoughby, Ohio produced radio cabinets, chassis, accessories, and RF components used by generations of amateur-radio operators and electronics builders. The LF-601 represents an earlier adjustable filter design that allowed individual filter sections and impedance characteristics to be mechanically tuned for a particular installation.
Origin Tracker
Obsolete Stock
Legacy or discontinued stock no longer in normal production flow. Future supply may be limited.
Pipeline quantities are informational and may change after arrival, inspection, sorting, testing, or donor teardown.
Compatible Radios / Boards
Designed for vintage RF and amateur-radio applications using SO-239 female connectors and compatible PL-259 coaxial plugs. Exact impedance, cutoff frequency, insertion loss, attenuation, and power-handling capability should be confirmed before connection to a transmitter or other powered RF source.
RF Boneyard Bench Notes
Visually inspected only. Five front-panel adjustment sections are present and labeled A through E. SO-239 input and output connectors are installed. Metal enclosure shows age-related surface wear, scratches, oxidation, and cosmetic marks consistent with vintage use. Internal components, continuity, frequency response, insertion loss, impedance range, harmonic attenuation, and power-handling capability have not been bench tested. Sold as an untested vintage RF filter accessory for evaluation, restoration, collection, or parts use.
Ask the bench before you buy.
Post a question about this part
Login or create an account to ask a product question. This helps keep spam out of the RF Boneyard bench.
Login to AskAnswered Questions
No answered questions yet. Be the first to ask the bench.