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Old 9th October 2008, 06:18 PM   #1
jackinnj is offline jackinnj  United States
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I just got the boards back -- so will be testing soon -- the circuit is unadulterated LB-47 from Nat Semi:

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Old 14th October 2008, 12:36 PM   #2
Gordy is offline Gordy  United Kingdom
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Looks very neat Jack. Good luck with it.

(By the way, if you post this in the tubes section I think you might get more response...)
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Old 14th October 2008, 01:51 PM   #3
jackinnj is offline jackinnj  United States
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The 33K resistor has to be at least 3W, preferably 5W. I have stacked 3 100K/2W. I am using some aluminum flashing as a heat sink -- works just fine.
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