#16
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Beromunster is in Switzerland: http://en.wikipedia.org/wiki/Beromunster
Yet another radio with a damn bloody live chassie. Last edited by Telecolor 3007; 01-27-2016 at 06:23 PM. |
#17
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I think you need to do your research better before just assuming that every single Radio from that time period was a hot chassis radio, when that actually wasn't the case, hot chassis radios (also known as AA5/AA6 radios) were purely an American design that was designed to cut manufacturing costs and that style of radio came about in the early 1950s and was usually only used on "cheap" plastic table-top radios (and later on in cheaper wooden tabletop radios in the early 1960s towards the end of the tube era in America). Most Higher End/High End radios and record players still had power transformers in them and were even fused with at least 1 A fuses, the Europeans at that time absolutely despised anything designed by the Americans at that time including radio designs and it showed in the fact that their radio designs all throughout the tube era were exceptionally high quality and no cost cutting in the designs including using a fused cold power supplies (they didn't want to stoop to the cost cutting design low that America sunk to). |
#18
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A lot of European countries had fairly strict electrical regulations, a hot chassis set may not have met them. Less room for error at 240V!
Last edited by Olorin67; 10-11-2015 at 09:39 PM. Reason: spelling |
#19
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IIRC there were some euro AA5 like designs....Rare but I do believe they existed. Not all of europe was always 240v 50Hz.....They had various voltages in the beginning.
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Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4 |
#20
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Audiokarma |
#21
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I've seen a few too many of this poster's insults , Telling folks "Do your research" all snooty like , when it is HIM who is WRONG himself ! Enclosed please find a picture of my 1940s Grundig 5 tube hot chassis set that was built for the European market as it has no English writing on it whatsoever (it's all in German) Look Kid , I know your excited about this great new hobby you've discovered , and sometimes youthful exuberance can be mistaken for arrogance , but you really do need to backpedal on calling folks out based on the limited knowledge you appear to possess about your new hobby . |
#22
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One thing I've ALWAYS MARVELLED at is how much PERFORMANCE, & richness of sound the Germans were able to coax out of these type of sets...I have 3 or 4 of 'em.. As many of 'em as I've seen 50 odd years down the road, EVERY GI in Germany must have brought home 4 or 5 of 'em.. These Bad Boys were as big of a part in the vaunted postwar "German Economic Miracle" as their cameras, & cars..
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Benevolent Despot |
#23
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European live chassis set
Hello!
O.k. it seems there is some confusion about european sets with live chassis. The reason for european set with live chassis is easy: Here in Vienna for example some districts had DC mains voltages others had AC back in these days. In Germany the situation was not much different. BTW: Max Grundig started rewinding burnt out power transformers which were connected to DC after the owner moved from a city with AC mains to another city with DC. I own 2 sets from 1936 which are both universal sets with live chassis. On the photos of the backpanel of one set you can see how many line voltages can be selected to solve this chaos. In this case the universal set was more expensive than the transformer set with parallel heaters. Otherwise collectors usually prefer pure AC sets without live chassis. This causes that sets with live chassis were parted out to save and repair the AC sets. I guess a set with a live chassis is now much rarer because of this fact. To make confusion perfect: I own a Radio from 1954 that has E tubes and a power transformer only for the heaters but a live chassis. Greetings Josef |
#24
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Wow people way to over react to my post! First of all I'm not "new" to this I've been working with vintage and antique electronics since I was in jr high and I'm 27 years old now, so that tells you that I'm not a newbie when it comes to this hobbie, I've successfully fixed everything from Cassette players, Record players, TV sets, VCRs, Stereo Equipment, clocks, tube radios, and even 8-track players, and the reason why I said hot chassis design radios were strictly an American Design was because of the fact that the AA5/6 Designation Stands for ALL AMERICAN FIVE/ ALL AMERICAN SIX which means that the design originated here in America, And in Europe when and if such a hot chassis design ever did exist it would of just been called a "hot chassis" design because for obvious reasons the AA5/AA6 designation would NOT work in Europe, seeing as its not America. And the only reason why I assumed that hot chassis designs didn't exist in European radios was because Most European Radios I've ever seen had power transformers in them where you switched the voltages in them, and I've always been told that all of Europe always was 220/240 volts AC and that 110/120 volts was only used in North America, with Japan being the only other country in the world to use an AC voltage that comes the closest to 110 (100 Volts AC).
So no I'm not misinformed about anything. And seriously what made everyone and their brother jump the gun as far as commenting on this thread that was previously dead for almost two years just because I had commented on it? I have previously made comments on previously long dead threads before and no one ever jumped the gun to post comments on them before like this. And really what doesn't make sense to me is why telecolor would be so concerned about whether or not a radio is a hot chassis versus cold chassis design or not, the way I see it if you plan on getting into the tube radio hobby then you're assuming the risks of having to come across or work on hot chassis desingned radios whether you like it or not. As long as you work on it with it unplugged and as long as you operate the unit with with the chassis inside its original cabinet with its original knobs in place there's no risk of getting shocked, but if you're just being an idiot and trying to repair the unit while its plugged it and turned on and or try to use the unit without its chassis in its cabinet and without the knobs attached then obviously you're going to get shocked, I see Telecolor's "concerns" as being rediculous, unfounded, and unnecessary. Last edited by Captainclock; 10-12-2015 at 05:03 PM. |
#25
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Audiokarma |
#26
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Just so you know , I'm NOT looking to argue here , but I just can't let inaccuracies such as you have printed remain unchallenged . You say you have been at this for 15 or so years , and you seem to think you've seen all there is to see in our hobby . Well , at somewhat over retirement age , and having worked back in the 1960s and 1970s in TV / radio repair , I can with all certainty tell you there is a LOT you haven't seen yet , and that the learning is supposed to be part of the fun of the hobby . |
#27
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#28
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I always thought, all the German radios had power transformers. The sets sold here, for the north American market, always seemed to have them.
I was surprised to see, so many of their TV's were series string, hot chassis sets, with some of the strangest tube types. The last of the German tube type Tv's were straight 220 volt design. When people brought them to the US, they had to be equipped with a step-up transformer. 120/240, auto-transformer type. |
#29
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Hello!
At first I want to point out that nobody should be offended because of anything. Honestly I don't know everything about american sets, otherwise I know a lot about our european sets. So it is definitely true that the mixed mains voltages caused a real chaos here in Europe. In some districts of Vienna DC mains were present until 1957. So the set I posted before is definitely able to operate with 110 to 240V AC and DC without a switching PSU of course. What I didn't mention was the fact that this circuit has significant disadvantages: hot chassis, much heat because of the serial resistor in the heater chain at higher voltages like 220 and 240V, poor performance at 110V because of the lowered plate voltage, mains plug has to be pluged in in the right position at DC otherwise the set will not work. Here you can download the schematic if you are interested: http://www.4tubes.com/SCHEMATICS/Rad...x_img/374U.jpg Quote:
@dieseljeep: Most, but of course not all, of the german and austrian TV sets had serial heaters and hot chassis also the sets from the mid 50s. There are many reasons for this: safe costs and weight for a power transformer. AC and DC compatibility and so on. My own combo which I itroduced here: http://www.videokarma.org/showthread.php?t=256949 also has a serial hot chassis and is AC and DC operational. If you really wanted to supply the set with DC a tube DC/AC converter was available as a feature to feed the AC motor of the Dual record player. Greetings Josef Last edited by Josef; 10-13-2015 at 11:05 AM. |
#30
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You will see many things like this in the course of your hobby , and to me it's cool to ponder what oddity of engineering would lead to such deviations from the "normal" way most sets were wired . |
Audiokarma |
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