Simple & Low Distortion DIY PreAmp

[circuitscc]

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.





Please take a look and give comments.

Thanks,

circuitscc

 

[circuitscc]

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

 

[circuitscc]

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.

 

[audiofan]

Where is the original desing with parts values ??

 

[circuitscc]

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

View attachment 63307-B tss.pdf

View attachment 63307-B bss.pdf

 

[analog_sa]

Maybe this ad should be moved to a more appopriate section.

 

[circuitscc]

Analog_SA,

You are right. It will be moved to vendors' forum eventually.

Thanks a lot!

 

[audiofan]

Ok now I see ...

 

[circuitscc]

Please note that discussion of this thread has moved to :

http://www.diyaudio.com/forums/vendors-bazaar/179516-simple-mirror-type-preamp-low-distortion.html#post2405736

Sorry for any convenience.

Regards,

circuitscc

 

[Rush]

JFET Active Crossover

I was wondering if there was any chance you want to make a PCB for this active crossover and power supply: http://www.diyaudio.com/forums/analog-line-level/169005-jfet-active-crossover.html

Rush

 

[USAcircuits]

Who is the copyright owner of this schematic?