HEWLETT PACKARD 3551A Transmission (Audio) Test Set
600 ohm Terminations, 40Hz to 20kHz, very good condx:$150 + Shipping (20lbs from 20191)
This is a late model, full up Analog Telephone Transmission Test set that:
**works great as a complete general purpose audio test bench*** It has normal banana jack connections.Full Description The 3551A Transmission Test Set is ideally suited for measurements on voice, program, and data circuits up to 50 kbps. Designed for use with North American Bell standards and is capable of measuring attenuation distortion, loss, message circuit noise, noise-with-tone, noise-to- ground, and single frequency interference. Receiver covers 40Hz to
60kHz with dynamic range from +15 dBm to -70 dBm and 0.1 dB resolution. Message circuit noise range is 0 dBrn to +85 dBrn; Noise-with-tone from 10 dBrn to +85 dBrn; Noise-to-ground from 40 dBrn to +125 dBrn, resolution is 1 dB. Balanced impedances of 135, 600, and 900 ohms. Measures 2-wire and 4-wire balanced circuits.The HP Model 3551A Transmission Test Set is designed for use in testing telecommunications equipment. It provides calibrated test signals while simultaneously making frequent or level measurements of voice frequency systems, program systems, and data ciruits. Some of the features provided are dial and hold capabilities, input impedences of 135, 600, and 900 ohms, choice of four noise weighting filters and digital readout of level or frequency.
Spec sheet available by email.
Please email replies.
Mike Nowlen snipped-for-privacy@comcast.net