Color Scheme:

Resistance Boxes-KEYS-P.O. Boxes

DECADE CONDENSER BOX

P-709 INSIF
Construction: these are constructed from silver mica, polyester & metal film capacitor.
Capacitors: are mounted on a 4 pole 11 position high grade band switches, which are arranged on a Bakelite Panel and enclosed in a Teak Wood Polished case
A) One Dial (any one range)
B) Two Dials (any one range)
C) Three Dials (any one range)
D) Four Dials ( any one range)
E) Five dials( any one range)

 

 

FIXED CONDENSER BOXES

P-710 INSIF
* High quality silver mica, paper polyester and metal film condensers are mounted on the Bakelite plate fitted in a steel turf Bakelite case.
* Two 4 mm socket terminals are provided.
A. Wooden box, fractional any upto 1 mfd
B. 2/5/8mfd C. 16/32/40 mfd


INDUCTANCE BOXES (DIAL TYPE)

P-749A INSIF
Each dial has 10 steps: These are housed in superior quality teak wood but with two 4 mm terminals for connection and dials fitted at top made of high quality black mica.
A) Single Dial Inductance box (any one range)
i) 100 micro Henry to 1000 micro Henry
ii) 1 milli Henry to 10 milli Henry
iii) 10 milli Henry to 100 milli Henry
iv) 100 milli Henry to 1000 milli Henry
v) 1 Henry to 10 Henry


FIXED INDUCTANCE BOXES

P-750 INSIF
(Any Single Following Desired Range)
The air cored inductance coils are fitted in wooden box or Bakelite case, nicely finished.
The frequency response is 1000 cycles/ sec.
Accuracy ±2.5%.
Ranges:(any one range)
* 50 micro Henry or
* 100 micro Henry or
* 500 micro Henry or
* 1000 micro Henry or
* 50 milli Henry or
* 100 milli Henry or
* 200 milli Henry or
* 500 milli Henry.

 


CARRY FOSTER KEY INSIF

P-761A INSIF
* Fitted on bakelite plates
* with brass C. P. Cup.


RALEIGHS KEY

P-761B INSIF
* Fitted on thick Bakelite bases
* with all brass parts.

CHARGE AND DISCHARGE KEY

INSIF P-762
* Used for Charging and Discharging of a capacitor.
* Nickel plated brass strips & pillars are used.
* Three terminals for connection fitted on a thick Bakelite plate.
* brass terminals

MORSE KEY

INSIF P-763
* Pattern, heavy type with 3 terminals.
* Fitted on wooden base having sun mica top.
* An aluminum rectangular block 10 cm in length is
* Fitted with a pin
* Fitted in a metal holder
* When this block is pressed,
* The contact is shifted to other terminal.

PLUG KEY Heavy

INSIF P-764
* Brass Blocks are mounted on Bakelite base.
* The brass plugs & lugs are thoroughly inter-lapped for perfect locking.
* Brass terminals are provided on the block.9 mm thick 10.5 mm thick
* a) One Way
* b) Two Way
* c) Three Way
* d) Four Way

TAPPING KEY SINGLE

INSIF P-766A
* Brass strip (Nickel Plated) with insulated knob and
* Terminals mounted on a Bakelite plate of high insulation.
* a) single
* b) double

Tapping Key Double

INSIF P-766B
* Brass strip (Nickel Plated) with insulated knob and
* Terminals mounted on a Bakelite plate of high insulation.
* Double Two brass strip (Nickel Plated)

Knife Key Single Double

INSIF P-767
* Double pole double through knife
* switch wired to reverse the current
* when the handle is thrown from one side to the other.

POST OFFICE BOXES Brass Plugs

INSIF P-858
A) 3 Ratio Arms
B) 4 Ratio Arms
* The 3-Ratio P.O. Box has sixteen wound coils 1, 2, 2, 5, 10, 20, 20, 50, 100, 200, 200, 500, 1000, 2000, 5000 ohms and two proportional arms each with coils of 10, 100, 1000 ohms .
* The 4-Ratio P.O. Box has sixteen coils as above and two proportional arms each with coils of 1, 10, 100 and 1000 ohms. Also incorporates infinity gap,
* double Brass terminals,
* Two spring keys for battery and
* galvanometers can be provided at extra
* incorporated in teak polished wooden box.

POST OFFICE BOX DIAL TYPE

INSIF P-859
* Dials : with 6-decades, four series dials for resistance 1,10, 100 & 1000 ohms and 2-Ratiao dials.
* Two terminals are provided for using the series dials as one ordinary dial type resistance box.
* without The Galvanometer(to be connected externally )
* battery key is provided.
* Range of measurement is 0.001 ohm to 1, 11, 10000 ohms.

POST OFFICE BOX DIAL TYPE

INSIF P-859
* Dials : with 6-decades, four series dials for resistance 1,10, 100 & 1000 ohms and 2-Ratiao dials.
* Two terminals are provided for using the series dials as one ordinary dial type resistance box.
* with in Built Galvanometer
* battery key is provided.
* Range of measurement is 0.001 ohm to 1, 11, 10000 ohms.

RESISTANCE STANDARD

INSIF P-879
OBJECT: TO BE USED WHERE ACCURATE MEASUREMENT OF RESISTANCE COIL IS REQUIRED
These are calibrated with highly accurate Bridges
Available in following ranges or as per the customer requirement for the experiments
*0.001
*0.01
*1 or
*2 ohms
highly accurate

RESISTANCE COIL

INSIF P-880
* The coil is wound non-inductively with insulated constantan wire and
* enclosed in a transparent cylindrical cover with
* square molded ends of either black or red or Yellow plastic.
A) Perspex
Having tansparent Body with Brass terminals both sides & wounded on coil clearly visible
B) Bakelite case
the coil is fitted in round bakelite box 2 inches round & having two Brass/bakelite terminals
C) Wooden case
the coil is fitted in wooden box having sizes 3" x 2" aprox having Bakelite plate on it with two brass terminals

RESISTANCE BOXES (PLUG TYPE)

INSIF P-891
USE: TO CALCULATE OR FIND OUT THE RESISTANCE OF A COIL and A simple use of the resistance box is to wire it to a battery via a galvanometer and two way key to measure an unknown resistance as in figure 3. Read the galvanometer deflection with the unknown resistance in circuit then change over and adjust the resistance box until the same deflection is obtained. Read off the resistance in circuit and there you have it. Other simple uses include adjusting relay timing, balancing duplex or quad telephony and in laboratory work.
Plug & socket contact us the best.
Manganin Coils Heavy OSAW Type
A) 0.01 - 1 ohms
B) 0.01-10 ohms
C) 1-50 ohms
D) 1-100 ohms
E) 1-500 ohms
F) 1-1000 ohms
G) 1- 5000 ohms
H) 1-10000 ohms

Inductance Boxes (Dial Type) three dials

P-749B INSIF
Each dial has 10 steps: These are housed in superior quality teak wood but with two 4 mm terminals for connection and dials fitted at top made of high quality black mica.
Two Dials (any one range)
i) 100 micro Henry to 10 milli Henry
ii) 1 milli Henry to 100 milli Henry
iii) 10 milli Henry to 1000 milli Henry
iv) 10 milli Henry to 10 Henry

Inductance Boxes (Dial Type) P-749C INSIF
Each dial has 10 steps:
These are housed in superior quality teak wood but with two 4 mm terminals for connection and dials fitted at top made of high quality black mica.
C) Three Dials (any one range)
i) 100 micro Henry to 100 milli Henry
ii) 1 milli Henry to 1000 milli Henry
iii) 10 milli Henry to 1000 milli Henry

Inductance Boxes (Dial Type) four dials

P-749D INSIF
Each dial has 10 steps: These are housed in superior quality teak wood but with two 4 mm terminals for connection and dials fitted at top made of high quality black mica.
D) Four Dials (any one range)
i) 100 micro Henry to 1 Henry
ii) 1 milli Henry to 10Henry

Inductance Boxes (Dial Type) five dials

P-749E INSIF
Each dial has 10 steps:
These are housed in superior quality teak wood but with two 4 mm terminals for connection and dials fitted at top made of high quality black mica.
E) Five Dials (any one range)
i) 100 micro Henry to 10 Henry

Item has been added to cart. Subtotal $200.

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