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Spot the deliberate mistake
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Old Croc
Old Croc


Joined: 03 April 2006
Location: Wales
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Points: 1552 		Post Options Post Options   Thanks (0) Thanks(0)   Quote login4 Quote  Post ReplyReply Direct Link To This Post Posted: 18 April 2013 at 6:08pm
its a dead short?
CELTIC SUBSONIC SOUND SYSTEMS
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kedwardsleisure View Drop Down
Old Croc
Old Croc


Joined: 20 January 2009
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Points: 4813 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kedwardsleisure Quote  Post ReplyReply Direct Link To This Post Posted: 18 April 2013 at 6:27pm
Creative gets the cake, there's no 32R tap on an AC30. They should either be 2 x 8 ohm drivers in series on the 16 ohm tap or 2 16ohm drivers in parallel across the 8R tap.

Bear with me while I photoshop a slice of cake as dad hasn't cut into it yet

This is the tip of an iceberg of a cock up after the amp visited a local 'vintage amp' specialist. Other faux-pas include two ECC82's where there should be two ECC83's, and an ECC83 where there should be an ECC82. The HT feed resistor should be 22R 10W on this version and it had been replaced with a 220R 6W resistor that had melted all its solder and burnt nearby wiring. The mains transformer tapping was set to 220V instead of 240V and I suspect he must've worked for Behringer as various components had been coated with hot melt glue.

Edited by kedwardsleisure - 18 April 2013 at 6:37pm
Kevin

North Staffordshire
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Joined: 05 February 2009
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Points: 139 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Creative Quote  Post ReplyReply Direct Link To This Post Posted: 18 April 2013 at 6:43pm
But besides that it was ok? I hope my photo of a slice of cake also will have a photo of a dollop of cream on top!
Time flies like an arrow - fruit flies like a banana!
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ceharden View Drop Down
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Joined: 05 June 2005
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Points: 11696 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ceharden Quote  Post ReplyReply Direct Link To This Post Posted: 18 April 2013 at 11:23pm
Hot melt glue in a valve amp, D'OH! LOL
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Old Croc
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Joined: 30 December 2011
Location: Smethwick
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Points: 3230 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dub Specialist Quote  Post ReplyReply Direct Link To This Post Posted: 18 April 2013 at 11:25pm
haha celestion green backs ? 
i used to have a pair my mate give them me years ago in very old cab you know the ones with that alli silver trim stuff Smile used to use them as mids over some 15" scoops only for partys house garden ect

used to drive them with a warrior xs2500w amp not hammer them just enuff to keep up with the scoops ect

to this day still dont know have i never blown them LOL at only around 25w-30w wow

thay were still in perfect working order and i sold them on ebay to some overs seas nut brought them and got a fair bit for them too

amazing LOL
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Nitz V1505 View Drop Down
Old Croc
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Joined: 16 September 2009
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Points: 1719 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Nitz V1505 Quote  Post ReplyReply Direct Link To This Post Posted: 19 April 2013 at 8:20am
The picture did make me chuckle.

Edited by Nitz V1505 - 19 April 2013 at 8:27am
LET THE BASS ROLL LIKE THUNDER
& THE TOPS LIKE LIGHTNING.....
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Old Croc
Old Croc


Joined: 03 January 2012
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Points: 7006 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Earplug Quote  Post ReplyReply Direct Link To This Post Posted: 19 April 2013 at 11:36am
Originally posted by kedwardsleisure kedwardsleisure wrote:

Creative gets the cake, there's no 32R tap on an AC30. They should either be 2 x 8 ohm drivers in series on the 16 ohm tap or 2 16ohm drivers in parallel across the 8R tap.


Would that matter since they were wired out of phase anyway?  LOL
Earplugs Are For Wimps!
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audiomik View Drop Down
Old Croc
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Joined: 06 April 2010
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Points: 2962 		Post Options Post Options   Thanks (0) Thanks(0)   Quote audiomik Quote  Post ReplyReply Direct Link To This Post Posted: 19 April 2013 at 11:42am
Re: "Would that matter since they were wired out of phase anyway?"

yes!

Mik
Warning! May contain Nuts
plus springs, washers, screws, etc, etc.
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Old Croc
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Joined: 25 April 2010
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Points: 2730 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Pasi Quote  Post ReplyReply Direct Link To This Post Posted: 19 April 2013 at 11:58am
But they are not on opposite polarity. Left hand connector is the + and if you turn both drivers so that connectors are at 12 o'clock, you can clearly see that + in to left driver, - out from the left driver goes to + on right driver and then - goes out to amp, and the grounding for the right hand driver is connected to this -.
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Old Croc
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Joined: 03 January 2012
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Points: 7006 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Earplug Quote  Post ReplyReply Direct Link To This Post Posted: 19 April 2013 at 1:14pm
Yup, the angle of the speaker does make it look wrong.

I´ve got this waiting for me in the workshop:



The speakers are wired similarly - but have a nice red spot on them for the visually challenged:



Smile
Earplugs Are For Wimps!
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kedwardsleisure View Drop Down
Old Croc
Old Croc


Joined: 20 January 2009
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Points: 4813 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kedwardsleisure Quote  Post ReplyReply Direct Link To This Post Posted: 19 April 2013 at 3:02pm
well I hope the client appreciates the difference in sound quality.
Kevin

North Staffordshire
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kedwardsleisure View Drop Down
Old Croc
Old Croc


Joined: 20 January 2009
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Points: 4813 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kedwardsleisure Quote  Post ReplyReply Direct Link To This Post Posted: 03 June 2013 at 8:44am
Spot the deliberate mistake(s).

a venerable Cloud VTX1500


Kevin

North Staffordshire
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