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Vintage Radio (domestic) Domestic vintage radio (wireless) receivers only. |
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18th Apr 2021, 10:08 pm | #21 | |
Dekatron
Join Date: Nov 2003
Location: Fakenham, Norfolk, UK.
Posts: 4,246
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Re: Radio transistor count
Quote:
Paul |
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19th Apr 2021, 10:04 am | #22 |
Nonode
Join Date: Jan 2004
Location: 1966-1976 Coverack in Cornwall and Helston Cornwall. 1976-present Bristol/Bath area.
Posts: 2,965
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Re: Radio transistor count
Back in the 1960's A lot of the cheapy sets from the far east were the biggest culprits of over inflating the transistor count.
My Binatone Mustang a small 2 waveband AM radio from 1970 claims it uses 9 or 10 transistors. It is actually a short superhet which uses 6 active transistors with the extra transistors used as diodes in the over complicated and rather poor and appalling totem pole output stage. A further transistor with one leg chopped off is used as a detector diode. I think was a a rather common selling ploy, or con, used by many different companies back in the day.
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Simon BVWS member |
20th Apr 2021, 8:39 pm | #23 |
Dekatron
Join Date: Apr 2012
Location: Wiltshire, UK.
Posts: 13,953
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Re: Radio transistor count
Wiring a less-than-spectacularly-performing transistor as a diode was not unusual; it could be used either as a diode-detector or as a temperature-sensing element in the bias-network of a push-pull audio output stage.
As an example, see http://www.wylie.org.uk/technology/s.../Newmarket.htm Newmarket never manufactured any diodes, so they strapped the legs of a transistor together and called it a NKT155 diode! I guess manufacturers using such diode-strapped transistors could legitimately claim them in the transistor-count they advertised on the front of the case. |
21st Apr 2021, 1:11 pm | #24 |
Heptode
Join Date: Nov 2008
Location: Stockport, Cheshire, UK.
Posts: 710
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Re: Radio transistor count
When l was a kid in the 1970's we all had the generic cheap transistor radios that you could buy from the market traders for £2.99
They all looked the same, with many different names such as "Mohan" and "Geeta" Some had five transistors and some had six. The six transistor ones were considered "better" but l've got a five transistor one in my collection and it performs surprisingly well, at least as well as any other cheap pocket radio of the era, in fact it's better than some of the "good" pocket radios in my collection. |