Author Topic: Duro-Test 40w Powertwist  (Read 1423 times)
joseph_125
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Duro-Test 40w Powertwist « on: July 23, 2022, 05:03:53 AM » Author: joseph_125
A bit spendy but these are getting hard to find now.

https://www.ebay.com/itm/115054637214
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funkybulb
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Re: Duro-Test 40w Powertwist « Reply #1 on: July 23, 2022, 09:22:48 AM » Author: funkybulb
For a Used power twist ?
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wide-lite 1000
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Re: Duro-Test 40w Powertwist « Reply #2 on: July 23, 2022, 06:29:36 PM » Author: wide-lite 1000
These were listed here before.
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James
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Re: Duro-Test 40w Powertwist « Reply #3 on: July 31, 2022, 11:16:51 AM » Author: James
This particular tube is most unusual in that it has two sets of grooves, and therefore looks like it was twisted twice as much as the more common types.  Maybe they were originally like that and then they reduced costs and switched to one groove?  I think the double-groove design here looks much better.
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108CAM
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Re: Duro-Test 40w Powertwist « Reply #4 on: October 12, 2022, 01:28:15 AM » Author: 108CAM
I just found a Power Twist that's branded as Duro-Lite True-Lite.
Here is the tube I found
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Fluro starter pings combined with a 50hz ballast hum and blinking tubes is music to my ears.

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