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Old 25th May 2007, 12:17 AM   #101
SY is offline SY  United States
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But at the end you get satisfaction. You design, guess informedly, do a cockpit check from memory, and all work exactly as you have planned. Not because of a piece of paper from some University. Also not superior intelllect. It is called experience.
As a self-taught non-engineer of very modest intellect, I say Bravo! to you, sir!
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Old 25th May 2007, 12:29 AM   #102
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60hz buzz
That is not the case in most other countries. We are completely free from the problem!

Instead, we get 50Hz buzzzzz
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Old 25th May 2007, 12:44 AM   #103
mach1 is offline mach1  Australia
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Breadboarding a circuit with two identical channels and having one of them refuse to stop oscillating despite swapping tubes, inserting huge grid / plate stoppers, making profane threats and examining chicken entrails......
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Old 25th May 2007, 01:16 AM   #104
nhuwar is offline nhuwar  United States
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Ok I'm a little worried! Whats with the chicken entrails.

yuck

Nick
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Old 25th May 2007, 04:58 AM   #105
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Originally posted by Johan Potgieter
[W]hat really #@$*%& me off is to have to recondition an amplifer, when you have to take off those components with leads wound through the terminal/tag-strip at least 2 times, clamped down in a vice and the component real close to all this barricading.

For goodness sake! It must just stay in place until you have soldered it! Nobody is going to lift the 20 Kg instrument by the lead of the grid resistor.
Hmm, sounds like my technique. I honestly have never considered that my hard-wiring method might be the cause of intense frustration to some poor sap down the line, but that's only because I've always assumed that the poor sap who will have to wrestle with reconditioning my homebrew stuff is me.

Here's something similar that I'll warrant is rarely encountered, but I encountered it when I was repairing an Avo transistor tester. The components in the tester were mounted on a PCB, but the leads were crimped after being trimmed, and then soldered. Why did Avo crimp the leads? Did they think the components would fall out?
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Old 25th May 2007, 05:19 AM   #106
EC8010 is offline EC8010  United Kingdom
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Originally posted by Martin Hayes
Here's something similar that I'll warrant is rarely encountered, but I encountered it when I was repairing an Avo transistor tester. The components in the tester were mounted on a PCB, but the leads were crimped after being trimmed, and then soldered. Why did Avo crimp the leads? Did they think the components would fall out?
I've seen that one on an AVO valve tester. Apparently, the idea is that you test the board without soldering, then, if it works, you solder the joints.* Sounds just daft enough to be true. It certainly made it difficult to fix the blasted thing.

*Makes you wonder about their quality control when that sort of thing is deemed necessary and acceptable...
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Old 25th May 2007, 02:06 PM   #107
56oval is offline 56oval  Australia
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to many brands of parts to choose from.
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Old 25th May 2007, 09:08 PM   #108
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Originally posted by SY

As a self-taught non-engineer of very modest intellect .....
Now there, all ye of golden ears and presumed absolute sensing gifts!

Another example how wrong subjective judgement can be.
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Old 25th May 2007, 09:15 PM   #109
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Something with a funny slant.

A colleague of mine once had to set up an amplifier/PA (battery operated) at a wilderness camp. Upon testing by touching the microphone input, he could not get the usual hum to indicate that all was well - the amp was "dead"......

Until it dawned on him: They were literally a hundred km away from the nearest mains overhead line/cabling of any kind. There was no close-by source of ac to provide hum when an input was touched!
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Old 25th May 2007, 09:31 PM   #110
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I don't "hate" any of it, elseways I'd find another hobby. There are things that I find more tedious than others, but I don't hate those parts.
The whole process is endlessly fascinating to me.

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