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Old 23rd July 2012, 05:23 PM   #24831
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Quote:
Originally Posted by scott wurcer View Post
put it in a TEK op-amp curve tracer (remember those?)
It better have been a 576..a 575 won't get you the time of day with me..

waittaminute!!..OP amp curve tracer??? I've AC traced bonding pads to substrate using the 576, many operators overdid the U/S and drove through the pad.. But the 576 isn't an opamp tracer...what's an opamp tracer?

jn

Last edited by jneutron; 23rd July 2012 at 05:26 PM.
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Old 23rd July 2012, 05:51 PM   #24832
1audio is offline 1audio  United States
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The OPAMP curve tracer is a plugin for the 576/577. (Or maybe only works on one of those)
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Old 23rd July 2012, 06:30 PM   #24833
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Originally Posted by hhoyt View Post
Sorry to rant; I have had to explain this to (mostly) deaf ears hundreds of times over the last 20 years.
Sorry for what? A breath of fresh air?

Great rant, Howie! Thanks!

se
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Old 23rd July 2012, 07:26 PM   #24834
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[QUOTE=RNMarsh;3101754 Did you buy any art to suppliment yur own work?[/QUOTE]


A few, luckily I know how to do the traditional mounting so I could take them folded into an envelope. There is an "art street" in Beijing where you can buy directly from the artists at a gallery while watching them paint. I tell tell you it was heartbreaking to visit before and after the Olympics, I took my sister there recently and it was decimated.
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Old 23rd July 2012, 07:30 PM   #24835
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Quote:
Originally Posted by jneutron View Post
It better have been a 576..a 575 won't get you the time of day with me..

waittaminute!!..OP amp curve tracer??? I've AC traced bonding pads to substrate using the 576, many operators overdid the U/S and drove through the pad.. But the 576 isn't an opamp tracer...what's an opamp tracer?

jn
Pretty rare item. Demian might be right that it was a plug-in. It did Aol, CMRR, etc. directly by displaying Vos vs. supply, output, or input as appropriate.
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Old 23rd July 2012, 08:42 PM   #24836
RNMarsh is online now RNMarsh  United States
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Quote:
Originally Posted by scott wurcer View Post
A few, luckily I know how to do the traditional mounting so I could take them folded into an envelope. There is an "art street" in Beijing where you can buy directly from the artists at a gallery while watching them paint. I tell tell you it was heartbreaking to visit before and after the Olympics, I took my sister there recently and it was decimated.
Yikes... folded?! I put mine in tube rolled up. But forget the tourist towns like Beijing. Go to XIAN.... up near Mongolia. No one goes there and you will get the best artists at the best price. I find the most unusual and best work from Monks and others in remote areas. Northern Laos is good too. Met a Laos-born Canadian there - studying to be a monk - he had just returned from his art show in hong kong.... Thep Thavonsouk. See Asian Art News magazine, if you dont already get it. -RNM
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Old 23rd July 2012, 08:58 PM   #24837
ahne is offline ahne  Europe
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hi there

i am just the new guy that pre loos very interessting , maybe some one make me more lucky *** on my birthday.

fore any information and help i be thankful .

cheers manuel
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Old 23rd July 2012, 09:00 PM   #24838
RNMarsh is online now RNMarsh  United States
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I've heard only metal can power transistors (TO3) make audible noise -- at full power, HFreq.... is it the magnetic filed and the steel case, perhaps? Thats what i thought it was caused by -RNM
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Old 23rd July 2012, 09:22 PM   #24839
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I had the op amp curve tracer plug in, designed for the 577, at our lab in Switzerland in 1974. It didn't do much for my modules, (too open loop linear) like the line amp for the JC-2, BUT it really showed the thermal problems of the uA741, etc. that it was meant to do. I have a 577 now, BUT I never could afford to buy the curve tracer plug in. Demian do you have a lead on this plug in? It would be interesting to try modern IC's.
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Old 23rd July 2012, 09:39 PM   #24840
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Quote:
Originally Posted by 1audio View Post
The OPAMP curve tracer is a plugin for the 576/577. (Or maybe only works on one of those)
Tek 577 with 178 plug-in.
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