Ostar Ganz valves - UK Vintage Radio Repair and Restoration Discussion Forum

Karen O · 23rd Oct 2018, 1:19 am

I think I have that spelled correctly.

Does anyone remember these?

I'm told they had 240V heaters.

Paul_RK · 23rd Oct 2018, 1:33 am

I've never knowingly met one, but a search for Ostar Ganz here and elsewhere brings up abundant info.

Paul

Karen O · 23rd Oct 2018, 7:31 am

Ah... 'Ostar Ganz'

It does help to get the spelling right

Thanks, Paul.

Radio Wrangler · 23rd Oct 2018, 8:49 am

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

rontech · 23rd Oct 2018, 9:08 am

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.

Cobaltblue · 23rd Oct 2018, 9:23 am

Looks like Langrex have at least one for sale.

https://www.langrex.co.uk/products/e...alvetube-lc27/

Cheers

Mike T

Nuvistor · 23rd Oct 2018, 9:31 am

A search of 1930’s WW as Ron’s suggestion returns about 30 results.

Karen O · 23rd Oct 2018, 10:41 am

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.

Karen O · 23rd Oct 2018, 10:51 am

A thought: I wonder if a mod can correct the spelling in the title of this thread to enable future searches...?

ukcol · 23rd Oct 2018, 10:53 am

There is some info on radiomusium about the EG100 in the Langrex link.

https://www.radiomuseum.org/tubes/tube_eg100.html

Herald1360 · 23rd Oct 2018, 10:40 pm

Quote:

Originally Posted by Karen O

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.

Maybe "there're" if you're thinking about each of the pesky little 240 volts individually.

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?).

Radio Wrangler · 23rd Oct 2018, 11:02 pm

OK, OK, There is a potential difference of 240 volts - presumably RMS. Things could get a little complex with DC mains.

David

boxdoctor · 24th Oct 2018, 9:33 am

Quote:

Originally Posted by Radio Wrangler

OK, OK, There is a potential difference of 240 volts - presumably RMS. Things could get a little complex with DC mains.

David

One complication that springs to mind, is filament migration, where, due the potential between the two ends of the filament, there is sufficient attraction to cause particles of filament material to migrate to the positive-connected end of the filament. An effect that is commonly observed in incandescent lamps fed from a D.C. supply. This would cause early filament failure.
Perhaps something was done to minimise this?. This obviously does not happen when A.C. is used to feed the heater. Tony

Mr Moose · 24th Oct 2018, 2:14 pm

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

boxdoctor · 30th Oct 2018, 3:24 pm

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.

PJL · 31st Oct 2018, 12:50 am

That LC27 is clearly marked as a rectifier which makes more sense.

David Simpson · 31st Oct 2018, 10:32 am

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

23rd Oct 2018, 1:19 am	#1
Karen O Rest in Peace Join Date: Jul 2011 Location: Bridgnorth, Shropshire, UK. Posts: 787	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
Paul_RK Dekatron Join Date: Nov 2003 Location: Fakenham, Norfolk, UK. Posts: 4,255	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
Karen O Rest in Peace Join Date: Jul 2011 Location: Bridgnorth, Shropshire, UK. Posts: 787	Re: Aster Ganz valves Ah... 'Ostar Ganz' It does help to get the spelling right Thanks, Paul.

23rd Oct 2018, 8:49 am	#4
Radio Wrangler Moderator Join Date: Mar 2012 Location: Fife, Scotland, UK. Posts: 22,871	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 __________________ Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done

23rd Oct 2018, 9:08 am	#5
rontech Heptode Join Date: Jun 2017 Location: Southport, Merseyside, UK. Posts: 646	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. __________________ Time flies like an arrow, fruit flies like a banana

23rd Oct 2018, 9:23 am	#6
Cobaltblue Moderator Join Date: Dec 2010 Location: Exeter, Devon and Poole, Dorset UK. Posts: 6,865	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 __________________ Invisible airwaves crackle with life or at least they used to Mike T BVWS member. www.cossor.co.uk

23rd Oct 2018, 9:31 am	#7
Nuvistor Dekatron Join Date: Aug 2013 Location: Wigan, Greater Manchester, UK. Posts: 9,433	Re: Aster Ganz valves A search of 1930’s WW as Ron’s suggestion returns about 30 results. Attached Thumbnails __________________ Frank

23rd Oct 2018, 10:41 am	#8
Karen O Rest in Peace Join Date: Jul 2011 Location: Bridgnorth, Shropshire, UK. Posts: 787	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.

23rd Oct 2018, 10:51 am	#9
Karen O Rest in Peace Join Date: Jul 2011 Location: Bridgnorth, Shropshire, UK. Posts: 787	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...?

23rd Oct 2018, 10:53 am	#10
ukcol Rest in Peace Join Date: May 2003 Location: Harlaxton, Lincolnshire, UK. Posts: 3,944	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, 11:02 pm	#12
Radio Wrangler Moderator Join Date: Mar 2012 Location: Fife, Scotland, UK. Posts: 22,871	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 __________________ Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done

24th Oct 2018, 2:14 pm	#14
Mr Moose Octode Join Date: Jul 2008 Location: Gloucestershire, UK. Posts: 1,043	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
boxdoctor Rest in Peace Join Date: Sep 2010 Location: Ripley, Derbyshire, UK. Posts: 785	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
PJL Dekatron Join Date: Sep 2005 Location: Seaford, East Sussex, UK. Posts: 5,997	Re: Ostar Ganz valves That LC27 is clearly marked as a rectifier which makes more sense.

31st Oct 2018, 10:32 am	#17
David Simpson Nonode Join Date: Mar 2008 Location: Aberdeen, UK. Posts: 2,853	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