1. Quiz #1
2. What did the initials 'BBC' stand for in 1922?
3. What is the name of the dog on HMV's label?
4. What is the difference between 'PM' and 'ME' when describing a loudspeaker?
5. Who designed the famous series of radios usually called 'the round EKCOs' ?
6. What is the BASIC difference between AM and FM transmissions?
7. Who first recorded pictures on a disc?
8. Who invented 'Noctovision', a system for seeing by infra-red?
9. Who or what was 'Stooky Bill'?
10. Who invented the scanning disc?
11. Where would you find 'pF' values?
12. Name the type of output valve designed to get around the pentode patents

13. What is Lee DeForest's claim to fame?

14. Who began broadcasting in FM first - Britain or America?

15. What common class or radio circuit uses valves with heaters in series?
16. What is a 'dielectric'?

17. Which famous radio and electronic 'giant' firm secretly owned Mullard during the 1930s?

18. Give another name for Phenol Formaldehyde.
19. What does 'octal' mean, in connection with valves?
20. What do the letters 'TRF' stand for?
21. What is the material usually referred to as white 'Bakelite'?

Click on the button at the bottom of the page to find the answers or carry on to quiz #2...

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Quiz #2

1. What is the difference between a filament and a heater?
2. What is, or was, a barretter?
3. 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?
4. What is 'ripple current'?
5. Which components are usually colour coded?
6. What do the letters 'A.F.' represent?
7. What is the difference between an 'audio' law potentiometer and a linear law potentiometer, and which should be chosen for a volume control?
8. Vari-mu valves are used for AVC (AGC) purposes, but what other purpose did they serve, especially in pre-WW2 TRF sets?
9. What is interlacing, and where would you find it?
10. Give the purpose of beam-forming plates in a tetrode valve.
11. What is 'Tygan'?
12. What aerial system did most valve portables use, before the ferrite rod?
13. Many nuts and bolts in old radios are 'B.A'. sizes. What does 'B.A.' stand for?
14. What was the Christian name of Mr. Murphy, of Murphy Radio fame?
15. What is a 'tweeter', and why would one be of little practical use on A.M. receivers?
16. Polythene, polystyrene, silvered mica. What?
17. To what is the mains transformer primary winding connected, on an AC radio?
18. What would the letters 'DDT' mean, printed on a 1930s valve?
19. What is meant by 'impedance'?
20. What is, or was, the purpose of a reaction control?

Click on the button at the bottom of the page to find the answers or carry on to quiz #3...

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Quiz #3

1. Name the well-known pipe-smoking gent who's name was also the brand name of his radio firm
2. What is 'ferrite'?
3. What is 'interlacing'?
4. Where might you find a bent-gun ion trap?
5. What, EXACTLY, do the initials 'VHF/FM' stand for?
6. What exactly do the initials 'PAL' stand for?
7. What term do we now use for the outdated 'LF'?
8. What purpose did a mirror-screw serve?
9. Give one reason why an indirectly heated rectifier in an AC mains set is considered preferable to a directly heated one
10. How many electrodes are there in an indirectly heated triode valve (tube)?
11. On some very early British radio sets, the term 'medium wave' was not used. What was used instead?
12. 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?

13. What is the term 'pot' short for? (No, it's not weed)

14. Name two commercial radio stations popular in the late thirties/early forties

15. To what do the terms 'B7G' and 'B9A' refer?
16. Copper Oxide was put to what common use in valve radios?

17. Who used the term 'Superinductance' on their sets?

18. Where would you find a 'voice coil'?
19. Where might you find a 'frame'aerial?
20. On a radio, what is the purpose of sockets marked 'P.U.'?

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