Avo Transistor Analyser Mk 2 Mk II
MK 11 Mark 2 Analyzer
Transistor Tester Mk2 MkII Mk11


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Avo Transistor Analyser Mk 2 Mark 2 Analyzer Transistor Tester

SPECIFICATION


The instrument has in general been constructed to meet the requirements of the
United Kingdom Inter-Service Specification K. 114, and will enable measurements to
be made on PNP, NPN and Point Contact transistors.
Range of Collector Volts

Transistor Analyser Mk 2.jpg (21692 bytes)

Using the Battery Power Unit: 1.5, 3, 4.5, 6, lO.5V of either polarity.
Using an external supply in conjunction with the Battery Power Unit or the Mains
Power Unit on its own:
0-12V of either polarity (for all measurements).
Using an external supply in conjunction with either the Battery Power Unit or the
Mains Power Unit:

2 Transistor Analyser Mk 2.jpg (20329 bytes)

0-150V (for dc characteristics, ~ and turnover voltage (VT) only.
Range of Collector Current
0-250mA using the Battery Power Unit.
0-IA using the Mains Power Unit or an external supply.
Range of Base Current -
0-imA and 1-4OmA in two ranges.
Small signal current gain (~)
0-25 and 0-250, in two ranges.

3 Transistor Analyser Mk 2.jpg (27984 bytes)

Noise Measurements (NF)
1-40db in two ranges.
Collector Emitter leakage current (Iíco)
First indication 2 micro-amperes.

2.1 Mains Power Unit

The unit provides stabilised outputs for the transistor under test and for the
internal circuits of the Transistor Analyser. It is mechanically and electrically
(except for collector supplies) interchangeable with the battery power unit.
The mains unit operates from mains supplies of 110ól28V or
190ó250V ac, 50/60 c/s. Instructions for changing the voltage tapping are
printed on the side of the mains transformer.

Collector voltage is continuously variable over the range 0.05V to l2V at a collector current of 1 amp. max. The stability of collector voltage is better than Ī 0.25.% for a 10 % change in mains input and the ripple voltage does not exceed 5mV peak to peak.

Overload protection is provided by an electronic cut-out which is pre-set to operate where a collector current of 1.IA is exceeded. This protects both the Transistor Analyser and the Mains Unit, should a transistor under test develop a short circuit. The cut-out may try (a) when changing from voltage to current measurement (b) when the mains unit is switched off and on again (c) when the collector voltage switch is changed from 9ó12 PNP to 9ó12 NPN or vice versa.

This is due to the smoothing capacitors taking current during charging and has no harmful effect. In the event of this happening the cut-out should be reset by depressing the reset button.
An indication that the cut-out has tripped is given by very low values of Vc
and Ic. The instrument may be re-set by depressing the re-set button provided.

Manual and Circuit
available Details Below
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The Information Consists of  the Following :-

Foreword 
Introduction 
Symbols and Equivalents used in this Manual 
Specification 

Mains Power Unit 
Basic Methods of characteristic checking 
Measurement of Iíco, Ic, Ib, Vc & Vcs 
Measurement of Beta (/3) 
Measurement of Noise (N.F.) 
The controls, their functions and operation 
Beta and Noise Control 
Base current controls 
Meter Switch 
Press Buttons Gain control 
Check/Set/Read control 
Function Switch 
Collector Volts control 
General procedure for testing a Transistor 
Measurement of Iíco 
Measurement of Ic, Vc, Ib, /3 
To measure Beta (/3) 
To measure Noise (N.F.) 
To measure Turnover voltage 
To measure Saturation voltage (Vcs) 
Measurement of líco, Ib, Ic, /3, /3, Vcs and Noise using external supplies 
The use of Heat Sinks 
Other facilities available
 
Use of meter for external voltage and current measurements 
Use of the internal amplifier 
Using the internal oscillator 
Checking the condition and replacement of the internal batteries 
To check the internal amplifier/oscillator batteries 
To check the condition of the internal supplies for the transistor under test 
Replacement of internal batteries 
Abbreviated Operating Instructions 
Schedule of Spare Parts

ILLUSTRATIONS 
Basic circuit for the measurement of Beta (/3) 
Basic circuit for the measurement of Noise 
Layout of the front panel controls 
Interior of the instrument 
Interior of the Battery Power Unit 
/3 to a Conversion Chart 
Circuit diagram of Battery Power Unit 
Circuit diagram of Mains Power Unit 
Circuit diagram of the Transistor Analyser Mk 2
 

Manual and Circuit
available Details Below
On Paper CD or Download

Click Here


Avo Transistor Analyser Mk 2 MK II MK 11
Mark 2 Analyzer Transistor Tester Mk2 MkII Mk11
Manuals are Available Worldwide as a Download on CD or Paper Copy.

The manual for the MK II should be ok for the early model with out a  mark number
EG AVO Transistor Analyser

Manual Including Circuits 49 A4 pages worldwide

Printed Paper Copy or on CD are Plus Postage.

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We do all we can to provide the very best that is available for you.
But in the unlikely event that any data should not be as you expected.
A refund is always available. Kind Regards Allen and Alanna.


Manuals are Available Worldwide as Paper Copy on CD or as a Download

Thank you for your interest. Allen and Alanna G0RIT
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Revised: January 20, 2016