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Vintage Radio (domestic) Domestic vintage radio (wireless) receivers only. |
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16th Feb 2020, 12:57 pm | #1 |
Dekatron
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Who collects small 1950s - 60s transistor sets ?
In reply to Stevehertz question. I have these. Not for sale. I can take a series of better pictures if required. Some of pictured sets are in "Vintage Radios" by forum member Tony Thompson.
John
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16th Feb 2020, 1:10 pm | #2 |
Nonode
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Re: Who collects small 1950s - 60s transistor sets ?
What is the one in the little presentation case? in pic 1
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16th Feb 2020, 1:19 pm | #3 |
Nonode
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Re: Who collects small 1950s - 60s transistor sets ?
I think I recognise the small blue one second from the right of the first picture. Russian if memory serves and they were advertised in PW/PE back in the sixties. Generaly didn't work on arrival.
Alan |
16th Feb 2020, 1:49 pm | #4 |
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Re: Who collects small 1950s - 60s transistor sets ?
That red "King" set, proudly proclaiming TWO transistors!
Was that a dodge to get around tax / licensing issues by claiming to be an "experimental" receiver? There's a dim bulb flickering in my mind about sets with two valves or fewer being treated specially because they were deemed to be serious scientific endeavour rather than frivolous entertainment .....
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16th Feb 2020, 1:58 pm | #5 |
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Re: Who collects small 1950s - 60s transistor sets ?
Not the same two transistor radio but I wonder if the circuit is similar:
http://www.jamesbutters.com/coronetboysradio.htm Lawrence. |
16th Feb 2020, 2:29 pm | #6 |
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Re: Who collects small 1950s - 60s transistor sets ?
Couple of examples on RM.
https://www.radiomuseum.org/r/summit...stor_boys.html https://www.radiomuseum.org/r/unknow...radio_k_2.html One reason for keeping the transistor count down and still be a radio, however good in performance was cost. Replacement transistors in the early 60’s I recall were around 23/6d for an OC45 type plus tax.
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Frank |
16th Feb 2020, 2:38 pm | #7 |
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Re: Who collects small 1950s - 60s transistor sets ?
They have squozen two litres out of a one litre bottle by moving the complexity to the wound components. It's ingenious! The first transistor is acting as an RF amp, then the detected signal is fed back into its base to allow it to act also as an audio preamplifier (it must be biased into its linear region, so no mixing occurs). The RF and AF transformers divert the amplified audio to the second transistor so it does not go around the loop again, and the amplified RF to the detector. The AF transformer must have enough stray capacitance of its own to allow the RF portion of the collector current through. There is another transformer blocking DC from the speaker and increasing its reflected impedance so the set can draw less current for the same volume of sound.
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16th Feb 2020, 2:40 pm | #8 | |
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Re: Who collects small 1950s - 60s transistor sets ?
Quote:
https://www.radiomuseum.org/r/standa..._g430g_43.html Most of them were very nicely presented, elaborate for their size (up to eight transistors in MW-only sets, and a few models included FM), and distinctly expensive. Paul |
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16th Feb 2020, 2:58 pm | #9 |
Nonode
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Re: Who collects small 1950s - 60s transistor sets ?
Those Micronic Ruby sets were pretty desirable in their day and are even moreso now! A lovely little gem of a radio. I seem to recall other manufacturers doing 'me too' copies.
Here are a few of my own collection of small transistor portables. They seem a bit thin on the ground, much less common than the bigger 'kitchen' sets. Probably because the pocket sets were seen as toys and chucked away. My favourite of this lot is the nifty little red NEC. It feels solid and rather like a bar of soap in the hand. None of these have been restored, just cleaned up and repaired where necessary. The Emerson's FM band is sadly defunct and it's such a densely-populated board it'll have to stay that way.
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16th Feb 2020, 3:22 pm | #10 | |
Nonode
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Re: Who collects small 1950s - 60s transistor sets ?
Quote:
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16th Feb 2020, 3:51 pm | #11 |
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Re: Who collects small 1950s - 60s transistor sets ?
In the first posting in the first picture one of the radios looks like the Soviet Cosmos-M radio:
https://www.bertibenis.it/Radio%20a%...SMOS-M%20E.htm A similarly small Soviet radio was the Orljonok: https://www.bertibenis.it/Radio%20a%...LJONOK%20E.htm Peter Last edited by orbanp1; 16th Feb 2020 at 3:57 pm. |
16th Feb 2020, 4:20 pm | #12 |
Tetrode
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Re: Who collects small 1950s - 60s transistor sets ?
I collect Roberts Radios I have :-
1 Tan coloured RT1 1 Tan coloured RT7 1 Dark Blue R200 2 R500s Dark Blue being my late Grandfathers and an olive coloured one that I just bought. 2 R66.s both blue 1 Roberts Rambler James |
16th Feb 2020, 4:47 pm | #13 |
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Re: Who collects small 1950s - 60s transistor sets ?
I thought the two transistor sets were described as a 'Boys radio' and classed more as a toy than a proper radio and therefore didn't incur the tax on a normal radio.
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16th Feb 2020, 5:16 pm | #14 | |
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Re: Who collects small 1950s - 60s transistor sets ?
Quote:
Peter |
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16th Feb 2020, 6:15 pm | #15 |
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Re: Who collects small 1950s - 60s transistor sets ?
I were about to post some more of my collection when I spotted another like one in the first photograph, can anyone spot the difference, the colour may have faded on one of the sets.
John.
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16th Feb 2020, 6:27 pm | #16 | |
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Re: Who collects small 1950s - 60s transistor sets ?
Quote:
John.
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16th Feb 2020, 8:24 pm | #17 | |
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Re: Who collects small 1950s - 60s transistor sets ?
Quote:
John.
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16th Feb 2020, 9:06 pm | #18 |
Octode
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Re: Who collects small 1950s - 60s transistor sets ?
Whilst they look the same one says “USSR” and the other “Hong Kong”. How about inside John? Whose components are used?
The story goes that they were imported from USSR in a roundabout manner via the Far East presumably to save on import duties and to gain a better reputation than “made in USSR”. As one advertiser put it when up for sale in the 60s (price £1).. “the batteries were left in” so corrosion was to be expected. Whilst not that common here there are plenty for sale in Germany. I think Laskys used to sell them complete with the rechargeable batteries and charger. Peter Peter |
16th Feb 2020, 10:07 pm | #19 | |
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Re: Who collects small 1950s - 60s transistor sets ?
Quote:
Too many rotten wires to disturb to delve any further into the set. The PCB's looks identical, one is much brighter than the other. I did notice the USSR radio did have a split ring to attach a key while the Hong Kong Version has a solid plastic ring with no split in it John.
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16th Feb 2020, 11:11 pm | #20 |
Tetrode
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Re: Who collects small 1950s - 60s transistor sets ?
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