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µupressor

author: StudioBElec
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2 layer board of 4.80 x 5.05 inches (122.0 x 128.3 mm)
Uploaded: May 03, 2014
Shared: May 09, 2014
Total Price: $121.20

Tube power board: Designed for 2 toroidal PCB mount xfrmers. The first in parallel to step down 120 V AC to a low filament voltage (12 V AC) This lower voltage is rectified and then has 2 adjustable LM317 regulated voltage outputs (designed for 9 & 12.5 V.) 4 jumper configured auxillary outputs. Switchable HV supply is provided through 2nd xfrmer in series (~280 V depending upon load and xformer power)

Compressor/OD board: Uses 2 12A(X/Y/U)7 tubes, with off board switchable compression and overdrive stages. Compression stage implements a variable-µ gain through the 2 LDRs (either LED or Lamp) which can be jumper configured to adjust the input bias (load-point) or the plate voltage to the compression stage. Internally adjustable Bandaxall tone stage as well.

External pot adjusted OD & compression levels as well as output level for each stage.

Contact me for more info and/or schematics:

facebook.com/studioBelec

Tube power board: Designed for 2 toroidal PCB mount xfrmers. The first in parallel to step down 120 V AC to a low filament voltage (12 V AC) This lower voltage is rectified and then has 2 adjustable LM317 regulated voltage outputs (designed for 9 & 12.5 V.) 4 jumper configured auxillary outputs. Switchable HV supply is provided through 2nd xfrmer in series (~280 V depending upon load and xformer power)

Compressor/OD board: Uses 2 12A(X/Y/U)7 tubes, with off board switchable compression and overdrive stages. Compression stage implements a variable-µ gain through the 2 LDRs (either LED or Lamp) which can be jumper configured to adjust the input bias (load-point) or the plate voltage to the compression stage. Internally adjustable Bandaxall tone stage as well.

External pot adjusted OD & compression levels as well as output level for each stage.

Contact me for more info and/or schematics:

facebook.com/studioBelec

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      Since this is a project designed by a community member, it may contain design errors that prevent it from working as intended. OSH Park cannot place any guarantees about the functionality or correctness of the design.
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