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fiddler59
Recording Org
Pro Audio Group
Joined: Apr 11, 2005
Posts: 31
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 Posted:
Sat Aug 02, 2008 6:33 am |
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I have an older VMP-4000e with the -30db pad switch. I notice the newer ones have a -25db value on the pad switch. What do I need to do (component swap) to change my pad value to the newer -25db spec. I have major soldering skills....
David Blackmon |
_________________
Style is based on limitations,
Music is based on repitition.....
John Hartford |
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Sebatron
Recording Org
Pro Audio Group
Joined: Dec 22, 2002
Posts: 824
Location: Melbourne Australia
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| Posted:
Sun Sep 14, 2008 12:10 pm |
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Hi Dave , apologies for the late reply.
You need to locate the negative feedback resistor that sets the gain for the first stage.
This value changed slightly as designs changed but is generally around 22k to 27k located in the vicinity of the connector associated with each channel.
Having located that resistor... you need to change it to 39k...
However , 47k might be in the cracks but sounds a little sweeter...
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~Sebatron~ for a sound that's big and strong. |
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