Buzz/Humm and ??? is a Isolated Transformer necessary?

Pro Audio Asylum

Pro studio recording equipment and music production/industry.

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I've run my rig with no problems for 10 years.
MIXER --- Rane mp24
AMP --- QSC 1500ex
SPEAKERS -- JBL sr-4738
DOUBLE CD PLAYER -- Dennon 2500
2X SENHEISER -- WIRELESS
Recenly added two lap tops - had a ground problem but lifted the ground on the AC DC adapters. And it cleaned up.
NEW PROBLEM ===== at a recent gig I had huge humm-buzz problems.
Nothing I tried worked. NOTHING! Unplugged my PC's and adapters.
Lifted the ground on all items. Nothing worked.
Had to bring out a back up mixer/amp and reconnect everything. Scared myself, and the Bride, nearly to death (but I survived).
The guys at "a local music shop" say to make myself bullet proof I must buy an isolation transformer for $1,300.00 SOUNDS PRICEEEEEE!!!!!! & HEAVY.
note: ON A SEPERATE CIRCUIT !!!!! no problems here. lighting was not the issue.
6128 NSI LIGHT BOARD
2 DIMMER PACKS
2 RELAY PACKS
8 EFFECTS
8 PARS

LOOKING FOR SUGGESTIONS & SOLUTIONS = DO YOU HAVE THE MAGICAL ANSWER??? NEED YOUR HELP!
- is a Isolated Transformer necessary???

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Topic - Buzz/Humm and ??? is a Isolated Transformer necessary? - DJJeff 03:31:43 04/13/04 (7)

Hmmm... - jneutron 12:22:47 04/13/04 (0)

Re: Buzz/Humm and ??? is a Isolated Transformer necessary? - Top Jimmy 09:24:47 04/13/04 (0)

Re: Buzz/Humm and ??? is a Isolated Transformer necessary? - Bill Wassilak 08:25:18 04/13/04 (0)

Could be dimmers - oldroadie 07:12:48 04/13/04 (0)

Re: Buzz/Humm and ??? is a Isolated Transformer necessary? - STUART 06:45:10 04/13/04 (0)

Environmental causes likely to blame. - Bill Fitzmaurice 05:45:32 04/13/04 (1)

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