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SD SFX-06 Paranormal preamp/DI - tech help needed!
Hello,
Just got an older,out-of-production SD Paranormal (SFX-06) preamp/DI on my workbench for repair.
The box in question sports a typical DC offset in the range of 2...2,5VDC (a common issue in true-bypass gear) ,making it a source of unwanted "thump" when activated the first time (the thump manifests only during the first press of the footswitch) and a continuous reason for raised eybrows and mumbling from the sound guys' side
.
Tried some different power supplies (from 9-VDC battery through Cioks and Voodoo power bricks,up to my custom,ultra-silent workbench PS)...the initial noise is here.
Can you provide me a schematic of the Paranormal?I'm interested mainly in the input/output/DI section because here's the problem (the 3-way preamp looks OK according to my measurements).
I know that it's a general policy NOT to publish schematics but I'd be very greateful if I could get a legit documentation for private use only.
Thank you in advance!
Just got an older,out-of-production SD Paranormal (SFX-06) preamp/DI on my workbench for repair.
The box in question sports a typical DC offset in the range of 2...2,5VDC (a common issue in true-bypass gear) ,making it a source of unwanted "thump" when activated the first time (the thump manifests only during the first press of the footswitch) and a continuous reason for raised eybrows and mumbling from the sound guys' side
.Tried some different power supplies (from 9-VDC battery through Cioks and Voodoo power bricks,up to my custom,ultra-silent workbench PS)...the initial noise is here.
Can you provide me a schematic of the Paranormal?I'm interested mainly in the input/output/DI section because here's the problem (the 3-way preamp looks OK according to my measurements).
I know that it's a general policy NOT to publish schematics but I'd be very greateful if I could get a legit documentation for private use only.
Thank you in advance!
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