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I used the brand name
'Colb Electronics' on and off for products I made from the mid
1950's until sometime during 1964. The first units I actually
sold were the TV Converters in 1955. I built many power units
and small front-end units for other people. Several radio-telescopes
that I sold at a later date. A number of stereo pre-amps but
only one complete stereo-gram unit (as shown below). Mantle radio's
were a passing interest in design and construction from time
to time but never sold. |
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My
first 'Stereo Radiogram', late 50's. Radio unit and special stereo
head fitted in the Garrard record palyer were obtained from EMI
Industries in Hayes Middlesex. The pre-amp was of my design and
build, as was the main power amp, with two lots of push-pull
6V6 valve units driving two seperate speaker units fitted in
concrete tubes. The power amp was mounted at the bottom behind
the fabric cover. |
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'Mantle
Radio' |
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Sadly I have no remaining
pictures of one. The only complete mantle radio that I kept at
home was damaged and discarded after one of our intercontintal
moves some years ago. It was based on circuitry from the ARRL
handbook, similar to the Bell five valve unit using an an EL84
for it's output , and string operated pointer behind a glass
dial in a wooden case (very similar in looks to the transistorised
mantle radios produced by 'La Wood Television Ltd', (branded
as the 'Linda' model, after my departure from the company). |
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