MIL-SPEC · Electronic Components
TS420BU
Test Set, Telecommunication Syste
Part NumberTS420BU
ManufacturerMIL-SPEC
AvailabilityAvailable to order — request a quote
Specifications
NSN6625-00-648-8745 (NSN)
Federal Item NameTEST SET,TELECOMMUNICATION SYSTE
Federal Supply Class6625 — Test Instruments
Electrical Power Source RelationshOPERATING
Height6.500 INCHES NOMINAL
Features ProvidedINTERNAL BATTERY ACCOMMODATION LOCATION NOT OTHERWISE SPECIFIED
MaterialSTEEL HOUSING
Reference Data And LiteratureTO 33A1-8-1-121
Functional DescriptionUSED AS A TONE SOURCE AND SWITCHING CENTER TO IDENTIFY CONDUCTORS AND PERFORM EXPLORING COIL TESTS ON EXCHANGE CABLES. A
Width8.750 INCHES NOMINAL
Test Type For Which DesignedCALLING IN SIGNALLING INDENTIFICATION OF CONDUCTORS IN A CABLE TONE TESTING
Length9.000 INCHES NOMINAL
Operating Test CapabilityVACUUM TUBE OSCILLATOR,5OO CYCLE TONE,7 CYCLE WARBLE FREQUENCY
Enclosure FeatureSINGLE ITEM W/HOUSING
RH Electronics, Inc. — independent stocking distributor since 1982.
Every shipment inspected on receipt · ISO 9001:2015 · ANSI/ESD S20.20 · ERAI member since 1998 · GIDEP participant
Every shipment inspected on receipt · ISO 9001:2015 · ANSI/ESD S20.20 · ERAI member since 1998 · GIDEP participant
Frequently asked
Is TS420BU available?
We can source TS420BU even if it isn't in our active stock list. As an independent distributor we reach inventory outside the franchise channel — including hard-to-find and obsolete parts. Send us a quote request.
Is TS420BU by MIL-SPEC obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If TS420BU has been discontinued, we can often source remaining stock or qualified alternates. Contact us with your quantity and target date.
How does RH Electronics verify parts like TS420BU?
Every incoming shipment is inspected under our ISO 9001:2015 quality system — documentation, markings, and construction checked against known-good references. For deeper analysis, we direct work through accredited independent labs. We've been an ERAI member since 1998 and a GIDEP participant.
Can you find a cross-reference or alternate for TS420BU?
Yes. Our team reads part numbers the way they were designed — decoding family, speed, temperature grade, package, and reliability level — to identify acceptable alternates when the exact part isn't available. Submit a quote request and we'll advise.