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Old 23rd December 2011, 04:50 PM   #101
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Default Hi in these pre-christmas time!

Hi all!

Just to have a note before the holiday: my old schoolteaching tells me - if you have a halogen bulb with 24 volt and 100 watt = 24x24=576 divided on 100 = 5,76 ohm!! Then you have 3 in seriell= 17,28 with 300 watt. If you then keep 3 more in paralell to those first 3 you end up with 600 watt AND 8,64 ohm. That is pretty close - and if you give 1 resistor in seriell with those bulbs - you get even closer. I have found som small bulbs(halogen 100 watt, 24 volt) here in Norway.

My SK82(KD33) was ordered 1 week ago. so the build will start in feb/mars!

Happy New Year

Greetings to all

Olav
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Old 23rd December 2011, 04:53 PM   #102
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Olav

I was talking about 300W/120V bulbs, not 24V.

O.K. maybe a way to go.

Thanks for all answers up to now.

Franz
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Old 23rd December 2011, 05:01 PM   #103
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Default Hi Franz

Yeah - I know that it would be a closer fit with 300watt and 120 volt, but it is somewhat difficult to get hold on 120 volts bulbs here in Norway - and with 230 volt and low wattage bulbs it is even vorse(like 230 watt and 20 or 10 watt)!

That is why I am thinking to try my amp with those 24/100 watt bulbs? Maybe?

Best to all.

Olav
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Old 23rd December 2011, 05:06 PM   #104
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don't you think this kind of filament could be inductive?!
Click the image to open in full size.
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Old 23rd December 2011, 05:07 PM   #105
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Quote:
Originally Posted by juanitox View Post
with this one you don't have heatsink but 72W watt of dissipation on a 300W resistor could be ok? Click the image to open in full size.
Looks like a cigar
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Originally Posted by ra7 View Post
woodturner-fran was it, who used halogen sticks in the Delite amp? Check the Delite thread.
Yep.
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Old 23rd December 2011, 05:32 PM   #106
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Quote:
Originally Posted by juanitox View Post
don't you think this kind of filament could be inductive?!
Click the image to open in full size.
oops 75h of life...
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Old 23rd December 2011, 05:55 PM   #107
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Originally Posted by Michael Rothacher View Post
Is 15,000 views enough to crack open the Christmas Ale?
Should have an Aladdin L'Amp for Christmas
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Old 23rd December 2011, 06:15 PM   #108
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Default so litlle ....

Hi again!

Here is my finding: From the ELFA catalog: 4000 HOURS!!!

: https://www.elfaelektronikk.no/elfa3...4-48&toc=19002

A search gave me this result - maybe it can be that i nyour country too??

Good luck - and the best to you.

Olav
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Old 27th December 2011, 12:08 PM   #109
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Out of sheer morbid curiosity, I tested a large source resistor bypass cap (47,000 uF) and the results were not especially good. 1W THD climbs from .07% to around .5%.
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Old 27th December 2011, 05:19 PM   #110
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0.5% not so bad for me .. and the sound?? i must be sure that i will kill my SET amp
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