Telecommunications

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.

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 Bakelite.

Genuine Vintage Western Electric Earpiece - New Old Stock.

Dimensions: 2.044" Diameter x 0.78 Depth, Inner Diameter Tapers down to 1.37" 

Connections: 2 Compression Screws

Mounting" Possibly by 2 Small Holes Approximately 0.085" Diameter 180 Degrees Across (See Picture 4).

Made in USA

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

New Replacement Handset which requires use with a Base Unit.

Neat & Attractive !!!

Vintage Genuine Conair New-Old Stock 

AMPHENOL - RJMG-B312-71-01 - RJ45 8-Cond Printed Circuit Connectors / Telephone Jack

Status: Discontinued

Modular Jacks GRN/YLW LED, 4X75 OHM 

Manufacturer: Amphenol           

Product Category: Modular Connectors / Ethernet Connectors   

Product: Connectors      

USOC Codes: RJ45           

Number of Ports: 1 Port

Shielding: Shielded         

Current Rating: 1.5 A     

Voltage Rating: 125 V    

Series: RJMG     

Contact Plating: Tin         

Gender: Jack (Female)  

Housing Material: Thermoplastic (TP)     

Product Type: Modular Connectors / Ethernet Connectors           

Tradename: RJ Mag

COMCAB - 501724 - Enclosures.

Telephone, Computer or Project Enclosure Box.

Flush Mount 5-1/4" L x 3-1/4" wW x 2-5/16" Tall.

Outlet Box.

Color: Beige.

Application:Excellent Project Box

L-Coms - KJ8-25P - RA258M - Communications Products.

Simplify serial data connections by substituting in L-com's economical D-sub to modular adapter kits. Each unit is programmable to your needs by simply inserting the prepared flying leads into the appropriate positions and snapping the connector in place. Designed with all the popular RJ style jacks and D-Sub connectors, these kits are perfect for field technicians who must determine wiring needs, or to use temporarily while waiting for a permanent cable assembly. L-com's unique custom pinning option allows you to let us do the pinning for you with modest minimums. Contact us today with your requirements and start saving money today!

Modular Adapter, DB25 Male / 8 Pin Modular Jack

Male DB 25 Pin Socket D Connector to KJ8 phone jack.

Complete with Plastic Hood.

Alternate: RA258M

MOSTEK - MK5103N-5 - IC, Telecom. Telephone Circuit Tone Decoder.

Telephone circuit Tone decoder.

Voltage 5V.

MK5103 uses 3.579545MHz crystal (television color-burst) for reference.

Touch tone decoder, tone to pulse converter

16-channel remote control.

Output either 4-bit binary or dual 2-bit row/column code.

Detects all 16 standard DTMF digits.

Package: 16 Dip.

New Old Stock - Very Rare - Tarnishing.

Carter Craft Communications - 90-012 - CB/HAM Radio Alternator / Generator Filter, 3 to 30 MHz.

Radio Noise Suppressor Filter

Maximum Current: 25 Amps

Filters "Whining" Noise from Generator Brushes

Easily Installed in Minutes

Large Inductor and Tunable Ceramic Capacitor design for maximum efficiency

For 6, 12 or 24 VDC Systems

Installation instruction attached and on Packaging.

New Old Stock - Made in USA

Alternate / Equivalent: Monarch GNF-1

Trisonic - TS-625 - Telephone Accessories.

Coiled Telephone Cord/Cable 4 Conductor with two 4 Conductor Modular Jacks.

Quality: Excellent and High-quality

PREMIUM QUALITY ~ Resists stretching & tangling

Length: 25 Ft.

Color: White.

Complies with Part 68 FCC Rules

UPC: 039612962048

Note: Manufacture Trisonic.

TEC - MA20 - Telephone accessories.

Line Powered Telephone Amplifier.

Handset Booster.

Enclosed, with attached modular plug.