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Vintage Radio (domestic) Domestic vintage radio (wireless) receivers only.

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Old 9th Apr 2018, 8:12 am   #61
crackle
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Default Re: Royalty has been paid on this apparatus...

I have added the latest details in my spreadsheet, but rather than upload it every day I will upload it every few days.
It would be really good to get more examples of pre 1950 and post 1964
thanks for your contributions

Mike
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Old 9th Apr 2018, 9:19 am   #62
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Quote:
Originally Posted by crackle View Post
Here is the list of radios and various licences so far, thanks to all who have contributed their examples.
Attachment 160735
Hi Mike.

I tried to open the attached file but when opening it requests to save again rather than actually opening. I'm not sure if my .xls converter is compatible or outdated.

Regards
Symon.
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Old 9th Apr 2018, 10:09 am   #63
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It needs LibreOffice to open.
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Old 9th Apr 2018, 10:11 am   #64
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Default Re: Royalty has been paid on this apparatus...

Opens OK for me in Excel (compatability mode) on this old Win 7 machine

Cheers

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Old 9th Apr 2018, 10:38 am   #65
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Default Re: Royalty has been paid on this apparatus...

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I tried to open the attached file but when opening it requests to save again rather than actually opening. I'm not sure if my .xls converter is compatible or outdated.
Assuming you have a program installed that can open .xls spreadsheets, it might just be a matter of navigating to your "downloads" folder and opening it from there.
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Old 9th Apr 2018, 12:06 pm   #66
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This is worth a read: http://eh.net/eha/wp-content/uploads/2013/11/Scott.pdf.

It's titled The origins of the Anglo-American `productivity gap’ in electronics: the
British and American interwar radio equipment industries. It tells a a lot of the story of radio patent licensing in the UK.
An interesting document, though written for the economist rather than the engineer. It makes what I would think is a controversial statement comparing American and British valve design in the 1920s and early 30s:

" American `tubes’ had low `gain per stage’ (of amplification), higher performance being achieved by increasing the number of tubes........... In Britain, by contrast, minimising royalties led firms to employ valves with progressively higher gain, or multiple valves contained in one envelope. These were produced to close tolerances, at substantially higher costs........"

Actual examples of valve types would clearly have been outside the scope of the original document, but it would be interesting to look at this assertion from the technical point of view. In particular, I struggle to believe that American valves were of significantly lower gain than their British equivalents. Can anyone think of examples?

I recognise that some US radios prioritised a high valve count for marketing purposes, and that the corresponding individual stage gain would have been adjusted appropriately by choice of component values. The British designer on the other hand would have been discouraged from a high valve count by high BVA 'per valve' royalties and would have designed accordingly. But I don't see that necessarily suggests that the American valve per se was of lower gain than its British counterpart.

Were multi-function valves such as the triode-hexode or double-diode triode really a peculiarly British invention in response to BVA royalties? Again, can anyone think of early examples?

Martin
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Old 9th Apr 2018, 12:49 pm   #67
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Were multi-function valves such as the triode-hexode or double-diode triode really a peculiarly British invention in response to BVA royalties?
My understanding is that Marconi, for example, charged royalties on a per-valve -holder basis, so the pressure to move to multifunction valves came from this and was resisted initially by the BVA.
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Old 9th Apr 2018, 12:54 pm   #68
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Default Re: Royalty has been paid on this apparatus...

Confusingly, one of the documents photographed above in this thread refers to the patent pool royalty as payable per-valve holder, and also states that each individual 'anode-cathode electron stream' counts as a valve!
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Old 9th Apr 2018, 1:03 pm   #69
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Wasn't there also at one time a disregard of power-rectifiers in the 'valve-counting' for royalty-purposes? I can see how that would have made sense in the days when most radios were battery-powered and you needed a sold-separately 'eliminator' to run off the mains.

Into the 1960s it was common to see domestic radios advertised as "four valves plus rectifier".
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Old 9th Apr 2018, 3:02 pm   #70
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Quote:
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Has anyone else got any examples of different labels.
The early KB radios displayed this licence plate, there was no sign of the other type of licence on KB radios from around this date.
But I notice that earlier radios often displayed a BBC licence transfer.
KB 214 MW & LW valve radio 1930
Here’s a paper label inside a KB PP31/1


John
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Old 9th Apr 2018, 7:16 pm   #71
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I tried to open the attached file but when opening it requests to save again rather than actually opening. I'm not sure if my .xls converter is compatible or outdated.
Hi.

I found the problem, Microsoft Excel Viewer wasn't installed on my usual Windows 7 computer. It's sorted out and I can now view the spread sheet. Also, after trying to open the same file on my Win 10 computer it envoked a download to install the Excel Viewer and that too is now working well. I am pleased the issue is now resolved.

Regards
Symon
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Old 9th Apr 2018, 7:33 pm   #72
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Default Re: Royalty has been paid on this apparatus...

Two labels from the same model the Cossor 546 1957 Transistor radio

Cheers Mike T
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Old 9th Apr 2018, 7:43 pm   #73
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Cossor 469 1947 portable valve Radio

Cheers Mike T
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Old 9th Apr 2018, 8:00 pm   #74
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Cossor 543 1956

Cheers

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Old 9th Apr 2018, 8:31 pm   #75
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Another 543

Cheers Mike T
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Old 9th Apr 2018, 8:39 pm   #76
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Cossor 561

Transistor radio 1957

Cheers Mike T
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Old 9th Apr 2018, 8:51 pm   #77
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Hi

A few more to add to the database:

Philips B4G12 A8-S plate
Ekco U243 A7-S plate
HMV 1117 as per pic1
Philips V6U as per pic2.

Regards
Symon.
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Old 9th Apr 2018, 9:11 pm   #78
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Default Re: Royalty has been paid on this apparatus...

Is the Philips V6U set British? there are only European ones listed in the radio museum.
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Old 9th Apr 2018, 11:36 pm   #79
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Hi Mike.

I suspect the Philips V6U is probably foreign made. I'll have a look at it tomorrow to check if there are any labels that might give some clues.

Regards
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Old 9th Apr 2018, 11:44 pm   #80
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Hi Mike (member crackle).

I noticed an error in the spread sheet, entry no#14, Philips B3G63A is listed as a TV. It is actually a radio.

Regards
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