-
What did the initials 'BBC' stand for in 1922?
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What is the name of the dog on HMV's label?
-
What is the difference between 'PM' and 'ME' when
describing a loudspeaker?
-
Who designed the famous series of radios usually called
'the round EKCOs' ?
-
What is the BASIC difference between AM and FM
transmissions?
-
Who first recorded pictures on a disc?
-
Who invented 'Noctovision', a system for seeing by
infra-red?
-
Who or what was 'Stooky Bill'?
-
Who invented the scanning disc?
-
Where would you find 'pF' values?
-
Name the type of output valve designed to get around
the pentode patents
-
What is Lee DeForest's claim to fame?
-
Who began broadcasting in FM first -
Britain or America?
-
What common class or radio circuit uses valves with
heaters in series?
-
What is a 'dielectric'?
-
Which famous radio and electronic 'giant'
firm secretly owned Mullard during the 1930s?
-
Give another name for Phenol Formaldehyde.
-
What does 'octal' mean, in connection with valves?
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What do the letters 'TRF' stand for?
-
What is the material usually referred to as
white 'Bakelite'?
-
What is the difference between a filament and a heater?
-
What is, or was, a barretter?
-
An AC/DC set was 'dead' (no valves lit) but when checked, only one valve
was found to be faulty. What was wrong with it?
-
What is 'ripple current'?
-
Which components are usually colour coded?
-
What do the letters 'A.F.' represent?
-
What is the difference between an 'audio' law potentiometer and a linear
law potentiometer, and which should be chosen for a volume control?
-
Vari-mu valves are used for AVC (AGC) purposes, but what other purpose did
they serve, especially in pre-WW2 TRF sets?
-
What is interlacing, and where would you find it?
-
Give the purpose of beam-forming plates in a tetrode valve.
-
What is 'Tygan'?
-
What aerial system did most valve portables use, before the ferrite rod?
-
Many nuts and bolts in old radios are 'B.A'. sizes. What does 'B.A.' stand
for?
-
What was the Christian name of Mr. Murphy, of Murphy Radio fame?
-
What is a 'tweeter', and why would one be of little practical use on A.M.
receivers?
-
Polythene, polystyrene, silvered mica. What?
-
To what is the mains transformer primary winding connected, on an AC
radio?
-
What would the letters 'DDT' mean, printed on a 1930s valve?
-
What is meant by 'impedance'?
-
What is, or was, the purpose of a reaction control?
-
Name the well-known pipe-smoking gent who's name was
also the brand name of his radio firm
-
What is 'ferrite'?
-
What is the American term for
'anode'?
-
Where might you find a bent-gun ion trap?
-
What, EXACTLY, do the initials 'VHF/FM' stand for?
-
What exactly do the initials 'PAL' stand for?
-
What term do we now use for the outdated 'LF'?
-
What purpose did a mirror-screw serve?
-
Give one reason why an indirectly heated rectifier
in an AC mains set is considered preferable to a directly heated one
-
How many electrodes are there in an indirectly
heated triode valve (tube)?
-
On some very early British radio sets, the term
'medium wave' was not used. What was used instead?
-
How did some set makers of the 'thirties get around
the problem of changes in broadcast frequency allocation, yet still provide
station names on the dial?
-
What is the term 'pot' short for? (No,
it's not weed)
-
Name two commercial radio stations
popular in the late thirties/early forties
-
To what do the terms 'B7G' and 'B9A' refer?
-
Copper Oxide was put to what common use in valve radios?
-
Who used the term 'Superinductance' on
their sets?
-
Where would you find a 'voice coil'?
-
Where might you find a 'frame'aerial?
-
On a radio, what is the purpose of sockets marked
'P.U.'?
