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Old 22nd March 2013, 05:48 AM   #1
Gost22 is offline Gost22  Bolivia
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Default Schematic with ECC88

Hello all!
I am interested to build a preamp for this schematic, so please make a comment like this to eat what is good or needed some changes to the schematics?!
Thank you for your cooperation!

(schematic with trademark violations removed by moderators)
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Old 22nd March 2013, 07:41 AM   #2
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Increase the b+ by a factor of about 10. Other wise looks like something worth trying.
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Old 22nd March 2013, 07:55 AM   #3
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Quote:
Originally Posted by SemperFi View Post
Increase the b+ by a factor of about 10. Other wise looks like something worth trying.
Hi. I'll have to disagree with you here: this has got to be the poorest schematic that our friend Gost22 has ever come up with...
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Old 22nd March 2013, 08:52 AM   #4
JMFahey is offline JMFahey  Argentina
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In other words, do not build it.
What are you trying to achieve?
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Old 22nd March 2013, 09:47 AM   #5
SY is offline SY  United States
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Quote:
Originally Posted by JMFahey View Post
What are you trying to achieve?
A record number of posts asking the same question, over and over. This one has the virtue of including a drawing violating trademarks as well.
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Old 22nd March 2013, 10:11 AM   #6
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Originally Posted by Vincent77 View Post
Hi. I'll have to disagree with you here: this has got to be the poorest schematic that our friend Gost22 has ever come up with...
Hmm. wasnt it just a two stage ckt with current feedback? I didnt look too closely, but didnt seem like a bad starting point. I was sceptical to the grid leak bias of stage 2, but apparently many people like that, so I didnt bother bring it up. I always figure people will experiment and tweak the initial designs anyways. So to me it looked like something to try.
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Old 22nd March 2013, 10:59 AM   #7
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Pointless thread without the subject.
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Old 22nd March 2013, 11:14 AM   #8
SY is offline SY  United States
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It was pointless WITH the subject as well. This poster has started thread after thread asking the same question. He has had numerous suggestions and apparently has tried none of them, but just opens yet another thread asking the same questions again.

The removed schematic was from an ethically-challenged Chinese vendor using a stolen trademark. It was pretty much the same as all the other Chinese vendor schematics that this member has posted before.
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Old 22nd March 2013, 11:23 AM   #9
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Thanks SY.
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Old 22nd March 2013, 12:14 PM   #10
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I see...didnt know this poster had such a history.
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