As promised here is a PCB and construction thread for the preamplifier as designed by Doug Self and published by Jan Didden in Linear Audio issue #5. Both gentlemen have graciously agreed to offer their support to guarantee success of this thread.
This preamplifier is especially interesting in that it includes what Doug describes as a 'comprehensive tone control', that means that both the gain and frequency hinge points for the HIs and LOs are continuously user adjustable.
For the last month I've been using this preamplifier listening to a variety of music and sources. Now that I have gotten used to having comprehensive tone controls at my fingertips I would miss them immensely if they were to disappear!
Another quality of Doug's creation is that it's quiet, so quiet that I have given up attempting to measure it's noise level with my aging AP Portable One test set. Noise level at the outputs is at or near the noise threshold of my test set.
Assuming there is sufficient interest I will offer up a kit of parts for builders amounting to the required IO and main PCBs, 6 potentiometers, 4 PCB mount RCA phono connectors, BOM and a PDF reprint of the Linear Audio article.
The cost for a 2 channel kit will be $65 plus actual cost to ship. Private message me for details if you are interested.
** NOTE that the latest project BOMs are here ...
The latest PREAMP BOM:
Dropbox - DSelf_PREAMP_BOM_v13_02.zip
The latest Front Panel Express files:
Dropbox - FRONT_PANEL_EXPRESS.zip
This preamplifier is especially interesting in that it includes what Doug describes as a 'comprehensive tone control', that means that both the gain and frequency hinge points for the HIs and LOs are continuously user adjustable.
For the last month I've been using this preamplifier listening to a variety of music and sources. Now that I have gotten used to having comprehensive tone controls at my fingertips I would miss them immensely if they were to disappear!
Another quality of Doug's creation is that it's quiet, so quiet that I have given up attempting to measure it's noise level with my aging AP Portable One test set. Noise level at the outputs is at or near the noise threshold of my test set.
Assuming there is sufficient interest I will offer up a kit of parts for builders amounting to the required IO and main PCBs, 6 potentiometers, 4 PCB mount RCA phono connectors, BOM and a PDF reprint of the Linear Audio article.
The cost for a 2 channel kit will be $65 plus actual cost to ship. Private message me for details if you are interested.
** NOTE that the latest project BOMs are here ...
The latest PREAMP BOM:
Dropbox - DSelf_PREAMP_BOM_v13_02.zip
The latest Front Panel Express files:
Dropbox - FRONT_PANEL_EXPRESS.zip
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