AVO Universal Measuring Bridge Type 1

AVO Universal Measuring Bridge Type 1

Bench mounted Measuring Bridge

Manufacturer :- Automatic Coil Winder and Electrical Equipment Co, Douglas Street, London

Brand :-AVO

Power :- External Main supply 240VAC

Ranges:-

Resistance:- 6 Ranges 0.1Ώ to 1000MΏ Accuracy ±1% at mid scale

Capacitance:- 6 Ranges 1pF to 1000µF Accuracy ±1% at mid scale

Inductance:- 6 Ranges 1mH to 1000H Accuracy ±2% at mid scale

Fully functional and used

Source:- My own collection
Donated by the son of a deceased colleague

AVO Signal generator Type T.F.M.

AVO Signal generator Type TFM

Bench mounted Signal generator

Manufacturer :- Automatic Coil Winder and Electrical Equipment Co, Douglas Street, London

Brand :-AVO

Power :- External Main supply 240VAC

Ranges:- 8 Frequency ranges

Modulation AM and FM

Approx 8Mhz to 200Mhz higher on harmonics

Fully functional and used

Source:- My own collection
Donated by the son of a deceased colleague

Micronta (Tandy) Digital Multimeter Model 22-198A

 

 

Micronta (Tandy) Digital Multimeter Model 22-198A

A medium sized hand held/bench Digital multimeter

Manufacturer:- Not Known, Custom Made for (Radio shack, Tandy UK )

Brand:- Micronta

Power :- Internal dry battery 9V, PP3 type

Sensitivity:DC or AC:1.5MΏ /volt

Ranges:-

  DC Voltage:0- 1000 volts
  AC Voltage:0-1000 volts
  DC Current:0- 2A
  Resistance: 0-20Meg 
  

Fully functional, Not used, retained for curiosity

Source:- My own collection
Donated by the son of a deceased colleague 

 

Micronta (Tandy) Multimeter Model 22-204B

Micronta (Tandy) Multimeter Model 22-204B

A medium sized hand held/bench analogue multimeter

Manufacturer:- Not Known, Custom Made for (Radio shack, Tandy UK )

Brand:- Micronta

Power :- Internal dry batteries 1.5V AA

Sensitivity:DC: 50,000Ώ /volt or 25,000Ώ /volt    AC:10,000Ώ /volt or 5,000Ώ /volt

Ranges:-

  DC Voltage:0-125mV - 1000 volts
  AC Voltage:0-1000 volts
  DC Current:  0-25microA -10A
  Resistance: 0-20Meg 
  Decibels:  -20 to + 62 

Fully functional, Not used, retained for curiosity

Source:- My own collection
Donated by the son of a deceased colleague 

 

AVO Multimeter Model 72

AVO Multimeter Model 72

A small hand held analogue multimeter

Manufacturer :- Automatic Coil Winder and Electrical Equipment Co, Douglas Street, London

Brand :-AVO

Power :- Internal dry batteries 1.5V AA and 15 V

Sensitivity:- DC 20,000 ohm/V & AC 1000 ohm/V.

Ranges:- DC: 0-1000 Volts AC: 0-1000 Volts ; Ohms: Ώx1- Ώx100 - Ώx10k

DC Current 0,05-1000 mA.

Fully functional, Not used, retained for curiosity

Source:- My own collection
Donated by retired Electrician

The Seesure Transistor tester

The Seesure Transistor tester

I don’t know a lot about this it runs from an external low voltage DC supply

and the control adjusted till the lamp changes then the hfe is read from the scale

Power:- External 9V

measuring:- hfe 5- 500 ?

Type:-  both NPN & PNP transistors

Does work ? Not used, retained for curiosity

Source:- My own collection 
Purchased  from Telford Rally 1980's

Jay-Jay, Inductance box

Jay-Jay, Inductance box 

 

Manufacturer:- Educational Measurements Ltd, Warsash, Southampton

Brand :- Jay-Jay Instruments

type:- L3

Description:- 3 x 10 position Inductance knobs (Inductance in Henrys)

x 10^-1 @ 30mA

x 10^-2 @ 50mA

x 10^-3 @ 70mA

still in use for Calibration and design of equipment

Source:- My own collection
Purchased  from Wythall Rally late 1990's

Jay-Jay, Resistance decade box

Jay-Jay, Resistance decade box

Manufacturer:- Educational Measurements Ltd, Bitterne , Southampton

Brand :- Jay-Jay Instruments

type:- 1

Description:- 4 x 10 position resistance knobs

Ω x 10000@ 7mA

Ω x 1000 @20mA

Ω x100 @70mA

Ω x10 @100ma

still in use for Calibration of equipment

Source:- My own collection
Purchased  from Wythall Rally late 1990's

Micronta Signal Injector SI-100

Tandy (Micronta) Signal Injector 

 

Use:- hand held unit for injecting test signals into circuits

Power:-   2 x AA cells 

Output:- Wide frequency output range from Audio to high RF on harmonics 

 

Now still used for quickness

Source:- My own collection 
Purchased  from Tandy own store in Wednesbury,  1980's