Excellent !!! Thank You very much !!! :)
Thank you for the prompt shipment of the Lusya LM317 LM337 Servo Power Supply Board. The board looks well designed and neat. The soldering is clean and professional. I examined the components with a magnifier and bright light and they appear to be of good quality. I tested the supplies and with my limited equipment and I measured AC RMS of 0.000V on the output. So it would appear that noise is less than my measurement limit of 1 mV AC RMS. Please note that the LM317 & LM337 outputs are the power supplies for the LF353 which has an absolute max rating of +/-18V. Be fully aware of this so that you do not set the output too high (and blow up the LF353). This appears to be a very nice supply. I used a high power neodymium magnet and the regulators and LF353 are not magnetic. I did note that the red "WIMA" caps are magnetic. The WIMA capacitors I bought a few weeks ago from an authorized distributor do not have magnetic leads.