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23rd Oct 2018, 1:19 am | #1 |
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Ostar Ganz valves
I think I have that spelled correctly.
Does anyone remember these? I'm told they had 240V heaters. |
23rd Oct 2018, 1:33 am | #2 |
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Re: Aster Ganz valves
I've never knowingly met one, but a search for Ostar Ganz here and elsewhere brings up abundant info.
Paul |
23rd Oct 2018, 7:31 am | #3 |
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Re: Aster Ganz valves
Ah... 'Ostar Ganz'
It does help to get the spelling right Thanks, Paul. |
23rd Oct 2018, 8:49 am | #4 |
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Re: Aster Ganz valves
I would expect the very thin filaments needed would make them rather short lived, and hum coupling would be an issue.
Not surprised they're rare! (Mr Apple has just suggested I replace 'they're' with 'there' or 'their'.... oh dear!) David
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23rd Oct 2018, 9:08 am | #5 |
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Re: Aster Ganz valves
I used to have a some late 1930's copies of Wireless World and they had advert's for
"Ostar Ganz" valves. I think they were of Czchech or Hungarian origin.
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23rd Oct 2018, 9:23 am | #6 |
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Re: Aster Ganz valves
Looks like Langrex have at least one for sale.
https://www.langrex.co.uk/products/e...alvetube-lc27/ Cheers Mike T
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23rd Oct 2018, 9:31 am | #7 |
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Re: Aster Ganz valves
A search of 1930’s WW as Ron’s suggestion returns about 30 results.
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23rd Oct 2018, 10:41 am | #8 |
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Re: Aster Ganz valves
I would have thought they would be attractive for circuits requiring only a single valve, e.g. photocell amplifier for automatic door. As David pointed out, I can't see it being good for audio when there's (or should that be 'there' ) 240VAC next to the electrodes.
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23rd Oct 2018, 10:51 am | #9 |
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Re: Aster Ganz valves
A thought: I wonder if a mod can correct the spelling in the title of this thread to enable future searches...?
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23rd Oct 2018, 10:53 am | #10 |
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Re: Aster Ganz valves
There is some info on radiomusium about the EG100 in the Langrex link.
https://www.radiomuseum.org/tubes/tube_eg100.html |
23rd Oct 2018, 10:40 pm | #11 | |
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Re: Aster Ganz valves
Quote:
I suspect that normal usage would treat "240Vac" as a collective noun so "there's" would be appropriate. Fowler might say something about it (them?).
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23rd Oct 2018, 11:02 pm | #12 |
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Re: Ostar Ganz valves
OK, OK, There is a potential difference of 240 volts - presumably RMS. Things could get a little complex with DC mains.
David
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24th Oct 2018, 9:33 am | #13 | |
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Re: Ostar Ganz valves
Quote:
Perhaps something was done to minimise this?. This obviously does not happen when A.C. is used to feed the heater. Tony |
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24th Oct 2018, 2:14 pm | #14 |
Octode
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Re: Ostar Ganz valves
Hello,
I think they were Austrian valves. They were also made in 110V and other voltage versions. They also made sets using their valves. I rather like their fishnet Faraday cage method of valve screening. http://www.r-type.org/exhib/abi0001.htm Yours, Richard |
30th Oct 2018, 3:24 pm | #15 |
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Re: Ostar Ganz valves
I believe that Germany, and possibly Austria, charged a sales tax at that time, based on the number of valves in the set.
This was a ingeniousl way of avoiding some of that tax. Tony. |
31st Oct 2018, 12:50 am | #16 |
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Re: Ostar Ganz valves
That LC27 is clearly marked as a rectifier which makes more sense.
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31st Oct 2018, 10:32 am | #17 |
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Re: Ostar Ganz valves
Karen, as you'll see from "Search", I put out an OG Valve post on the 15th March 2015. It still tested fine on my DC Valve Tester after all these years & produced a decent Ia/Vg graph.
Regards, David |