Oh no, its possesed.

Jean · 18th July 2004, 02:39 AM

I decided to wire up my gain clone today and fire it up before I finish the chassis 100%. Didn't get any magic smoke out, but look at the meter

Jean · 18th July 2004, 02:44 AM

the other channel

Jean · 18th July 2004, 02:45 AM

bird nest

Jean · 18th July 2004, 02:46 AM

working, but not finished yet

jleaman · 18th July 2004, 03:12 AM

should that be on 600 V not 2000M ? might get a better read out.. I don't know if your meter does what mine does when you move the decimal :O )

AudioFreak · 18th July 2004, 03:24 AM

Quote:

Originally posted by JasonL
should that be on 600 V not 2000M ? might get a better read out.. I don't know if your meter does what mine does when you move the decimal :O )

His meter is set on the 200mV range which is correct. The purpose of the original post was just to point out the 666.

jleaman · 18th July 2004, 03:28 AM

OHHh i didn't know that LOL

carlosfm · 18th July 2004, 07:37 PM

If you use NI topology without the caps from RI to ground (ex: Ci in LM3886 datasheet) you risk having big DC offset.
On one channel you may have 50mv, on the other you may have 100mv.
The chips have a huge production drift.
The problem is, those caps (Ci) usually affect the sound in a negative way.

That's why I like the Inverting topology, very easy to control dc-offset, without caps. Inverting + input buffer is the way to go!

And regulated... another step forward!

Sorry, I must be a weird guy

, but this sounds so superior that I can't believe people are still insisting on a copy of the Gaincard...

karma · 18th July 2004, 08:49 PM

carlos do you have a Shematic. of the chip Invertined

thanks....

carlosfm · 18th July 2004, 09:18 PM

My thread is still closed...

I don't wanna spread my circuit all over the place, it's not logical for someone to search.
Yesterday I posted it here, I'm not posting it anymore outside my thread, so take note, post#50, here:
Impression of the real Gain Card

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18th July 2004, 03:12 AM	#5
jleaman Banned Join Date: Apr 2002	should that be on 600 V not 2000M ? might get a better read out.. I don't know if your meter does what mine does when you move the decimal :O )

18th July 2004, 03:28 AM	#7
jleaman Banned Join Date: Apr 2002	OHHh i didn't know that LOL

18th July 2004, 07:37 PM	#8
carlosfm Banned Join Date: Mar 2003 Location: Lisbon, Portugal	If you use NI topology without the caps from RI to ground (ex: Ci in LM3886 datasheet) you risk having big DC offset. On one channel you may have 50mv, on the other you may have 100mv. The chips have a huge production drift. The problem is, those caps (Ci) usually affect the sound in a negative way. That's why I like the Inverting topology, very easy to control dc-offset, without caps. Inverting + input buffer is the way to go! And regulated... another step forward! Sorry, I must be a weird guy , but this sounds so superior that I can't believe people are still insisting on a copy of the Gaincard...

18th July 2004, 08:49 PM	#9
karma diyAudio Member Join Date: Feb 2003 Location: hamilton,ontario	carlos do you have a Shematic. of the chip Invertined thanks....

18th July 2004, 09:18 PM	#10
carlosfm Banned Join Date: Mar 2003 Location: Lisbon, Portugal	My thread is still closed... I don't wanna spread my circuit all over the place, it's not logical for someone to search. Yesterday I posted it here, I'm not posting it anymore outside my thread, so take note, post#50, here: Impression of the real Gain Card

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