Welwyn B1607 Milspec Wirewound Vitreous Enamel Resistor 470 Ohm 5% 76 W MBL3-2

Description

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WE PURCHASE AND RECYCLE 

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COMPONENTS AND EQUIPMENT!

For sale here we have the above…

1 Piece  

Vintage Welwyn B1607 military specification tubular power resistor 470 Ohm +/-5% 76W (or 95W at higher surface temp)
Ceramic Tube Green Vitreous Enamel Glazed Wirewound Resistor.

General Information
Vitreous enamelled wirewound resistors are capable of
withstanding a higher dissipation size for size, than any other
protected type; this is attributable to the higher operating
temperature which the wire and enamel can withstand.
Vitreous enamel provides exceptionally good protection to the
wire element and is essentially impervious to moisture. The
resistors can safely be used in harsh environmental conditions.
The Welwyn range is based on thirteen sizes of tube, each of
which has a recommended maximum dissipation which limits
operating surface temperature to a maximum of 375°C.
The stability and high reliability of Welwyn tubular vitreous
resistors is a direct result of the best quality materials being
used in their construction.
High purity ceramic tubes have been matched with nickel
chromium resistance wires and specially formulated enamel to
ensure that the resistors can withstand repeated heat cycling
without damage.
Connections between the resistance element and end
terminations are welded; other connections are brazed.
Mounting devices are available which permit resistors to be
mounted by both ends or by one end. Single ended mounting
is recommended for applications which do not subject the
resistor to shock or vibration.
Ferrules and the F type mounting plug are anchored into the
tubes with high temperature adhesive.

Marked B1607 76w6 470R 5%
Weight 118g
Suitable for bolt on connection and mounting.

WW 76W 5% (the milspec labelling says 10W this refers to the early 1600 series and is incorrect these 1607’s are 76W or higher)

470 Ohm

Power Rating: 76W (95W at higher surface temp)

Product Range: WELWYN – B1607 Series

Resistance: 470ohm

Resistance Tolerance:  5%

Resistor Case Style: bolt on connection and mounting

Resistor Element Material: Wirewound

Voltage Rating: 200V

Tolerance +: 5%

RoHS: No.   

103mm long, standing 47mm high, 30mm in diameter. 

NSN no. 5905 99 638 1169

NSN (National Stock Number)  

A NATO Stock Number, or National Stock Number (NSN) as it is known in the US, is a 13-digit numeric code, identifying all the ‘standardized material items of supply’ as they have been recognized by all NATO countries including United States Department of Defense. 

Now obsolete!

They are stored with us still sealed in original NSN packaging.  

Originally supplied to a large ‘Milspec ‘ type Co.   

Please note: these are genuine NSN quality items dating from the 80’s (date codes vary slightly 80, 81, 82 etc all seem to be early 80’s) 

PLEASE NOTE!

These parts came to us as part of a lot of surplus stock from a large distribution Co. and have been kept in storage for some time (sealed packaging dated early 1980’s),  we have therefore classified them as ‘new other’, they are however pristine, stored with us sealed in original packaging and in good serviceable condition, the photographs are representative of their general appearance, being of some of our actual stock, and, as with all our products they come with a full guarantee.