Telecommunications

Mini Circuits Labs - BHP-50 Coaxial High Pass Filter.

Rugged Shielded Case

50 Ohm 41-800Mhz,

BNC Male to BNC Female.

Dimensions: 

Applications: Lab Use, Transmitters/Receivers, Radio communications

New Old Stock

More info: https://www.minicircuits.com/WebStore/dashboard.html?model=BHP-50%2B

159-157-RA1 Relay, Reed. Mercury Hg-Wetted, Form C.

The mercury-wetted contact relay represents one of the more sophisticated types of relays made today. The early pioneer work in mercury-wetted contact switching dates back to the 1950’s, as telephone laboratory scientists sought out the “perfect contact”.

Reed relays use an external electromagnet to control the reed switch. The contacts are of magnetic material and the electromagnet acts directly on them without requiring an armature to move them. Sealed in a glass tube, the contacts are protected from corrosion. Mercury-wetted relays are fast in operation and have relatively good load carrying capacity and long life. The mercury films are reestablished at each contact closure and contact erosion is eliminated. The mercury films are stretchable, there is no contact bounce and because it is a mercury contact, the contact resistance is very low and idea for low level switching applications.

A mercury-wetted reed relay is a form of reed relay that employs a mercury switch, in which the contacts are wetted with mercury. Mercury reduces the contact resistance and mitigates the associated voltage drop. For high-speed applications, the mercury eliminates contact bounce, and provides virtually instantaneous circuit closure. Mercury wetted relays are position-sensitive and must be mounted according to the manufacturer's specifications. Because of the toxicity and expense of liquid mercury, these relays have increasingly fallen into disuse.

The high speed of switching action of the mercury-wetted relay is a notable advantage. The mercury globules on each contact coalesce, and the current rise time through the contacts is generally considered to be a few picoseconds. However, in a practical circuit it may be limited by the inductance of the contacts and wiring. It was quite common, before restrictions on the use of mercury, to use a mercury-wetted relay in the laboratory as a convenient means of generating fast rise time pulses, however although the rise time may be picoseconds, the exact timing of the event is, like all other types of relay, subject to considerable jitter, possibly milliseconds, due to mechanical imperfections. The only major weakness of a mercury wetted contact relay is the necessity to mount the relay within 30° of a vertical position, due to its position sensitivity.

Type: Form C

Contacts: SPDT.

Switched Load Rating: 2 Amp, 500 Volts Max, 100 VA Maximum

Carry Load Rating: 5 Amp

Contact Resistance: 14 Milliohms Typical, 20 Milliohms Max.

Packaging: Under High Pressure in Glass Capsules.

Approximate Dimensions 5.8mm D x 38mm Long. (0.225" X 1.5")

Life Expectancy: 1 billion operations minimum at rated load.

Note: Mercury Hg-Wetted.

Danger - High Pressure Glass Capsule- Handle with Care - User assumes responsibility and competency to handle this item.

TELLABS - 81.2301 Rev A - Cablespan 2300 Shelf, Multi-Service Access Platform, Channel Bank Aassembly with Connectors.

Cablespan 2300 Universal Telephony Distribution System, designed to enable cable operators to increase the potential of existing hybrid fibre-coax networks by offering telephony, telecommuting and video conferencing; Cablespan is provided by Tellabs through a joint venture with Advanced Fibre Communications Inc, doing digital loop carrier technology in Petaluma, California.

Rack Mount Cablespan 2300 System Universal Telephone carrier.

26 Card Slots with Back Plane.

Material: Cold rolled steel - Zinc plated per ASTM-B633 Type II (Gold) SC2

New in Box.

Note: Retail was $1228.00

Corinth Telecommunications - ITT - 250000-MBA-20M - Premier Black Corded Desk Telephone, New

Corinth Telecommunications Corp. is part of ALCATEL and formerly ITT. Corinth is the leading manufacturer of consumer telephones in the USA. 

Tel-Touch (DTMF) Dial has pushbuttons. Each pushbutton generates a unique dual tone when pressed. Tone dialing is faster than rotary or pulse dialing. It allows user to access long-distance carriers and remote services (such as banking, dictation, computer, etc) which require tome commands after the directory number has been reached. 

White Numerals on Gray Buttons

Black Body

Black Coil Curly Cord

Ringer Loudness Adjustment on Bottom

FCC Reg, No. GVI3RE-19475-TE-T

Ringer Equivalence: 0.5A

USOC Number: RJ1C

Hearing Aid Compatible

With Instructions and Line Telephone Cord 6P6C RJ12 RJ11 DSL. 

Note: Requires a landline but no external electrical power or batteries. Operates completely off Landline Phone Line Signal and maintains service during power outages. In an emergency, a good old-fashioned landline phone has been regarded as the most reliable method of communication. When storms knock out power, cell towers often go dark, as do high-speed internet connections.

Reliable, Neat & Attractive !!! - Corder - Never Loose that Handset or have a Low Battery Situation.

In Factory Packaging 10.5" X 6.25" X 6.5", 3 Lbs.

Vintage Genuine High Quality ALCATEL - ITT

Great Executive or Retirement Gift.

Proudly Made in USA. 

Western Electric - 723A Telecom. Telephone Receiver Earpiece.

For operator's headsets.

Vintage Molded Bakelite

Size: 2.25" D x 1.25" and has two mounting holes on either side of black WE plastic.

Accepts two wires or lugs to gold terminals inside the replaceable 4IN81 Element.

Western Electric - 464A - Dual 2-Conductor Phone Switchgear Plug 

1 per Bag.

Material: Heavy Duty Solid Brass.

Screw Terminals - Brass "T" Cable Clamp.

Authentic Vintage Western Electric - New Old stock

Complete with hardware.

Western Electric - 440-201 Telephone Earpiece Receiver.

Magnetic Low Impedance (Low-Z).

Genuine (WE) Western Electric Vintage Replacement for Handsets.

Dimensions: 52mm D x 20mm deep with two screw terminals.

Color: Black.

Genuine Vintage Western Electric Earpiece - New Old Stock.

Made in USA

Western Electric - 241A Switchgear Connector.

Dual Mono Male Plugs, 1/4" (6.35mm) 

Material: Heavy Duty Solid Brass.

Screw Terminals - Brass "T" Cable Clamp.

Authentic Vintage Western Electric - New Old stock

Alternate: 100395235

Complete with hardware.

COMMUNICATIONS SECURITY DEVICE 5 x 10-86 KEYS NEW with Handset - general Instructions and for installation to Scientific Radio's SR-380 included. This goes to a scientific radio model SR-380 radio (rack-mounted with handset hook switch).

ProAm - 4894000 - Connector, Coax. UHF SO-239 Female to SO-239 Female Coupler, UHF Right Angle 90 Degree Elbow. 

Sturdy & Well Made - Made of brass copper body and teflon insulator for a good connectivity and reliable signal every time. Heavy duty and water proofing body to nesure secure fit. 

SO-239 Female to SO-239 Female Coupler

Right Angle Elbow

Impedance: 50 Ohm

Made of brass copper and teflon insulator for a reliable signal every time. 

Material: Nickel-Plated Machined Brass Construction

UHF 90 Deg Female, Threaded Bulkhead with washer to Female Threaded 

Extra Heavy Duty / High-Power.

Life/Durability :≥ 1000 cycles.

Dimensions: 1" OD x 1.85" high x 1.37" wide.

Applications: CB Radio Ham Radio, VHF Radio, antenna, Two Way Radio Amateur Radio Marine VHF Radio, SWR Meter, 

CONAIR - OKI - PR5001H5 Trim-Line Hand Set Telephone (no hang-up base included).

White Numerals on Huge Buttons

Black Body

Black Coil Curly Cord

Redial Button

Ring Tone or Pulse Switch

Off Low High Switch

Ringer Equivalence: 1.4B

Neat & Attractive !!!

Vintage Genuine Conair New-Old Stock 

Enclosure, Junction Box Adapter SCS1-i to RJ12.

Telephone Junction Box with a 50 Pin Male Centronics (50) SCSI-1 to (Eight) RJ12 6 pin phone jacks.