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Old 21st October 2009, 03:35 AM   #21
Tea-Bag is offline Tea-Bag  United States
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The lightbulbs represent a 20ohm load. I think that a reasonably sized Power resistor would work here, but this amp has nothin to do with this thread. If Nelson would give it a pet name for now, such as School Boy amp, then we could get started, or maybe Depletion mode Mosfet amp. Guess that wood work.

Time for me to read the review of the real J2...
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Old 21st October 2009, 06:07 AM   #22
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How about "Atouk"? - A good name for a Caveman says Ringo.
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Old 21st October 2009, 08:40 AM   #23
Telstar is offline Telstar  Italy
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Originally Posted by massimo View Post
In Italy starting Sept. 1st shops cannot sell traditional 100 W bulbs any more. From Jan. 2nd 75 W, etc. etc.
It was supposed to be an European law.
We will find them at flea markets aside tubes in the future.
What a crap! Let's all get eyes disturb with those horrible energy-saving fluorescent lamp
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Old 21st October 2009, 10:03 AM   #24
flg is offline flg  United States
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Originally Posted by Tea-Bag View Post
... If Nelson would give it a pet name for now,...Depletion mode Mosfet amp...
Depletion Zen Lite
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Old 21st October 2009, 10:14 AM   #25
massimo is offline massimo  Italy
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Depletion Zen Lite
Nice! I support that.
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Old 21st October 2009, 10:22 AM   #26
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What about instead of using a light bulb using a few tubes instead just using the
heaters for the load resistor. Kind of a passive hybrid.
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Old 21st October 2009, 10:35 AM   #27
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Depletion Zen Lite
Yes, that's better!
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Old 21st October 2009, 04:21 PM   #28
flg is offline flg  United States
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Well, for the Diy'ers in countries with the green light bulb problem, you can also use water heater elements. In the US I tried a few and I think I scrounged up some 4500W units that are about right. 4500W/220VAC 10ohms(they were actually slightly lower) but you have to watch out for the temp they get to in the open air. They come in several shapes and sizes.
There is a version of Zen Light on this forum somewhere built exactly that way. You don't get any of the warm glow though
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Last edited by flg; 21st October 2009 at 04:24 PM.
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Old 21st October 2009, 05:05 PM   #29
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There are still alternatives, for example this 105W halogen light bulb. Take a look here:

Halogenglühlampe klar

I think, they are beautiful! Manufactum says, that their phase out date is september 2016.

The water heater element idea is brilliant too! Think of an amp with included coffee/grog/glogg warmer! OK, liquids and electricity do not go together well...
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Old 21st October 2009, 06:00 PM   #30
Zen Mod is offline Zen Mod  Serbia
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halogen sticks , also heating elements of so called "Quartz" stoves ; in fact plain resistive spiral , put in quartz glass tube
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