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Old 2nd July 2012, 11:36 AM   #31
juma is offline juma  Germany
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Quote:
Originally Posted by Ipanema View Post
... I'm using BC550B which only gives 0.58V instead of 0.65V. How can I compensate for the biasing difference? Thanks.
Nothing really to compensate for - the only consequence is about 10% lower bias. If you want higher bias try another small BJT or adjust values of R1-R4 (lower value resistors will give higher bias).
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Old 2nd July 2012, 01:00 PM   #32
Ipanema is offline Ipanema  Malaysia
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What are the functions of R1~R4 besides setting the bias current? Thanks.
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Old 2nd July 2012, 07:24 PM   #33
juma is offline juma  Germany
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Originally Posted by Ipanema View Post
What are the functions of R1~R4 besides setting the bias current? Thanks.
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Last edited by juma; 2nd July 2012 at 07:28 PM.
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Old 2nd July 2012, 08:43 PM   #34
generg is offline generg  Germany
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juma can you fake a SIT out of it....?

question is half joke, half cool idea.....
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Old 2nd July 2012, 08:50 PM   #35
Zen Mod is offline Zen Mod  Serbia
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it's already faked , I think by revintage
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Old 2nd July 2012, 09:06 PM   #36
generg is offline generg  Germany
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Originally Posted by Zen Mod View Post
it's already faked , I think by revintage
Yes Zen Mod, will it drive F4?
and this button is a fake too! that lasts on.... I want the red one back..... vintage..... Not these alcoholic blue one.....
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Old 2nd July 2012, 09:16 PM   #37
buzzforb is offline buzzforb  United States
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Of course not, Sit is depletion device. Its right there in the article....lazy!
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Old 2nd July 2012, 09:24 PM   #38
generg is offline generg  Germany
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Juma is gifted......!
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Old 2nd July 2012, 09:28 PM   #39
Zen Mod is offline Zen Mod  Serbia
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but fake SIT made of enhanced mode device is still enhanced mode device



not that I'm forgetting amp. factor issue then , if we are still talking about Camp Amp
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Old 2nd July 2012, 09:33 PM   #40
buzzforb is offline buzzforb  United States
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I agree on all counts.
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