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5th November 2010, 03:33 AM
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#1 |
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diyAudio Member
Join Date: Sep 2005
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Simple & Low Distortion DIY PreAmp
Greg,
As this category is more appropriate for discussion of pre-amp, I moved the thread here. Schematic and Micro-Cap simulation result were shown. 63307-B.jpg 63307-FINAL.jpg Please take a look and give comments. Thanks, circuitscc |
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11th November 2010, 02:51 AM
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#2 |
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diyAudio Member
Join Date: Sep 2005
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Greg,
If you are using MPS8099/8599 for the input differential pairs, change R3 R8 R33 R38 to 1K R7 R12 R37 R42 to 12k R4 R9 R34 R39 TO 120R This combination will reduce 3rd harmonic to less than 0.001%. Regards, circuitscc |
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20th December 2010, 03:05 PM
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#3 |
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diyAudio Member
Join Date: Sep 2005
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Here is the bottom trace and top silk screen.
Any comment? I made a sample order of this PCB. The boards will arrive very soon. |
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20th December 2010, 07:15 PM
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#5 |
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diyAudio Member
Join Date: Sep 2005
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Schematic, PCB layout, BOM and special instructions will be shipped together with each PCB (no components).
It is a 2-layer PTH, high definition (no kidding, money back guarantee) FR4 lead-free design with 2-oz copper (most computer motherboard is 0.5 oz). Silkscreen printed on BOTH sides. Each PCB contains 2 channels, +/- voltage regulators and rectifiers. Tracking information from UPS indicates the boards will arrive on Dec 22. Price per board is USD15 (bare PCB only). If you need the 4 pcs of Cooper Bussmann terminal blocks, which may be difficult to source in some countries, please add USD3. Shipping within the US is USD3 for any number of boards you buy. Shipping to overseas is USD5 per shipment for any quantity bought. You can send payment to my PayPal account circuitscc@gmail.com 63307-B tss.pdf 63307-B bss.pdf |
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20th December 2010, 09:09 PM
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#7 |
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diyAudio Member
Join Date: Sep 2005
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Analog_SA,
You are right. It will be moved to vendors' forum eventually. Thanks a lot! |
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21st December 2010, 01:35 AM
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#9 |
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diyAudio Member
Join Date: Sep 2005
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Please note that discussion of this thread has moved to :
Simple Mirror Type PreAmp with Low Distortion Sorry for any convenience. Regards, circuitscc |
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2nd May 2011, 12:54 AM
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#10 |
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diyAudio Member
Join Date: Sep 2009
Location: Tampa, Florida
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JFET Active Crossover
I was wondering if there was any chance you want to make a PCB for this active crossover and power supply: JFET Active Crossover
Rush |
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