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Spot the deliberate mistake
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kedwardsleisure View Drop Down
Old Croc
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Joined: 20 January 2009
Location: Staffordshire
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Points: 4947 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kedwardsleisure Quote  Post ReplyReply Direct Link To This Post Posted: 14 August 2018 at 5:40pm
And another!
Kevin

North Staffordshire
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mini-mad View Drop Down
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Joined: 13 July 2012
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Points: 6903 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mini-mad Quote  Post ReplyReply Direct Link To This Post Posted: 14 August 2018 at 5:41pm
What simpleton puts a diode in backwards???
If it sounds like a gorilla is trying to escape, turn it down.
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Jimmer View Drop Down
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Joined: 30 April 2010
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Points: 2605 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Jimmer Quote  Post ReplyReply Direct Link To This Post Posted: 14 August 2018 at 5:42pm
DZ1 Geek he had a 50/50 chance i guess
Light travels faster than sound....That's why some people appear bright until you hear them speak!
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kedwardsleisure View Drop Down
Old Croc
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Joined: 20 January 2009
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Points: 4947 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kedwardsleisure Quote  Post ReplyReply Direct Link To This Post Posted: 14 August 2018 at 7:27pm
no-ones spotted the mistake in the previous pic though yet!
Kevin

North Staffordshire
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bee View Drop Down
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Joined: 14 June 2011
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Points: 4553 		Post Options Post Options   Thanks (0) Thanks(0)   Quote bee Quote  Post ReplyReply Direct Link To This Post Posted: 14 August 2018 at 7:35pm
are the transistors all the same..... they look like two different specs...
 
do I get a bonus point if I can guess the owner.....


Edited by bee - 14 August 2018 at 7:36pm
https://www.elements-audio.com
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Conanski View Drop Down
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Joined: 26 January 2006
Location: Ottawa, Canada
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Points: 2537 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Conanski Quote  Post ReplyReply Direct Link To This Post Posted: 14 August 2018 at 7:39pm
I can't quite make out the labels on those output devices but is it that there are not 4 complimentary pairs?
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kedwardsleisure View Drop Down
Old Croc
Old Croc


Joined: 20 January 2009
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Points: 4947 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kedwardsleisure Quote  Post ReplyReply Direct Link To This Post Posted: 14 August 2018 at 7:42pm
I think the 'geezer' gets the brownie point.

All the NPN transistors in the channel had been taken out and replaced by PNP ones.
Kevin

North Staffordshire
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Jimmer View Drop Down
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Joined: 30 April 2010
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Points: 2605 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Jimmer Quote  Post ReplyReply Direct Link To This Post Posted: 14 August 2018 at 7:54pm
could they have twatted it up any more? Jeeze Sleepy 
Light travels faster than sound....That's why some people appear bright until you hear them speak!
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kedwardsleisure View Drop Down
Old Croc
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Joined: 20 January 2009
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Points: 4947 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kedwardsleisure Quote  Post ReplyReply Direct Link To This Post Posted: 14 August 2018 at 8:02pm
Let's not pre-judge the previous engineer, it's bad form. He/she might be a really nice person having a bad hair day. I'm sure the carpet fitter thinks the same about my DIY kitchen cushion-flooring! Mind you, that only cost £60, roll end.

Earlier I removed a repair link which unfortunately had linked the wrong parts together, sending DC (+/- 120V on this model) into the output leg of a potted PWM module. But that's one for in the morning. I haven't thrown in the towel just yet.




Edited by kedwardsleisure - 14 August 2018 at 8:03pm
Kevin

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odc04r View Drop Down
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Joined: 12 July 2006
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Points: 5482 		Post Options Post Options   Thanks (0) Thanks(0)   Quote odc04r Quote  Post ReplyReply Direct Link To This Post Posted: 15 August 2018 at 9:51am
Least carpets don't tend to catch fire when you install them wrongly!
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MattStolton View Drop Down
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Joined: 04 September 2010
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Points: 4234 		Post Options Post Options   Thanks (0) Thanks(0)   Quote MattStolton Quote  Post ReplyReply Direct Link To This Post Posted: 15 August 2018 at 9:54am
Originally posted by odc04r odc04r wrote:

Least carpets don't tend to catch fire when you install them wrongly!


Sounds like a challenge....
Matt Stolton - Technical Director (!!!) - Wilding Sound Ltd
"Sparkius metiretur vestra" - "Meter Your Mains"
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mini-mad View Drop Down
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Joined: 13 July 2012
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Points: 6903 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mini-mad Quote  Post ReplyReply Direct Link To This Post Posted: 15 August 2018 at 12:36pm
If it sounds like a gorilla is trying to escape, turn it down.
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