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Quad balance
Quad balance
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Old 15th August 2006, 03:34 PM   #1
ginsner is offline ginsner  Canada
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Default Quad balance

ok this should be an easy one
just hooked up a Quad 33 +405
and there is something crossed
the left and right channels are swapped and the balance is only centered when the control is all the way to the left, which turns down the left speaker.

I am guessing there is a pot controling the balance that is shot or was improperly repaired
anyone have an answer?
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Old 15th August 2006, 07:55 PM   #2
Zombie is offline Zombie  Sweden
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see to that only the "stereo" button is pressed...
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Old 15th August 2006, 09:04 PM   #3
ginsner is offline ginsner  Canada
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Default yup its pressed

and when i press the left mono btn it turns off the left
right turns off right
and yes the speakers are hooked up correctly
unless of course the brits have there lefts and rights backwards with stereos like they do driving
i was thinking before that i was possible that the wires were crossed in the din from the pre to power
but that doesn't explain why the balance control has to be all the way left to turn down the left speaker to match the right
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Old 15th August 2006, 09:33 PM   #4
richie00boy is offline richie00boy  United Kingdom
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Location: Gloucestershire, England, UK
Quad balance
I suspect the balance pot is either shot or has been replaced with a logarithmic one by a monkey.
www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, modules and more.
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Old 16th August 2006, 09:04 PM   #5
ginsner is offline ginsner  Canada
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Join Date: Aug 2006
Default It was a monkey, Its confirmed

I took the 33 to work today along with the 4pin output din so i could make use of the nice meter and iron there.

and yes it had been worked on by monkeys. the L and R lines had been swapped on one end of the output cable as i first thought and the pot for the balance was not centered. It went .25-1.25 on the left and 0.0 to 1 on the right.

This made me rather happy as it was a 10 min fix with no cost instead of the start of a search for new pot or worse.

I was absolutly amazed at how clean it was after opening it for the first time. Not a speck of dust inside, looked like it was new.
For something thats as old as I am i was very impressed as most electronics today look like crap after about 6 months.
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