Hi, I think the voltage regulator number you are trying to remember is TL783.
Max input voltage up to 150V and output 125V max. at 700mA Regards, Brian G. ----- Original Message ----- From: eliya gwetta To: [email protected] Sent: Saturday, July 04, 2009 10:37 PM Subject: Re: NEOTEK: Power for Series IIIc Pre's Hi Matt, Yes! I remembered the LM317 not being the right regulator for 48V, a TL583 would be a drop in replacement or I would have to change other components in the circuit as well? On Sat, Jul 4, 2009 at 9:25 PM, Matt Syson <[email protected]> wrote: Hi The JLM circuits are pretty much what you need so you could either 'copy' the circuit and build it yourself or buy the kit. I am not too impressed at using a LM317 for the phantom 48 rail, they are only rated to 39 or 40 volt DIFFERENTIAL (input pin to output pin) , meaning that if you short the output you stand a good chance of 'blowing it up'. I presume the 47 Ohm resistor is a lame way of trying not to 'kill' it, hardly a good engineering solution. You should substitute it for a TL583 (sorry this number won't come to me, but there is a similarly packaged regulator that handles 125 Volts). Matt S Donald Put wrote: If you're up to making your own, there are numerous PCBs/kits available for this type of project. They're set up for dual voltages and 48VDC for the phantom power. Check out JLM's offerings on his website: http://www.jlmaudio.com/JLM%20Power%20Supply.htm Cheers, -- Don ------ View the list online at: http://www.mail-archive.com/[email protected] You can unsubscribe at anytime by sending an email to mailto:[email protected] with "unsubscribe neotek" in the message body. If you have any difficulties, or questions --please send an email to mailto:[email protected]. The Neotek list is lovingly hosted by Catapult Web. Remember that any message or reply sent to the list will be automatically forwarded to all subscribers. Vive Le Neotek! Thanks. __________ Information from ESET NOD32 Antivirus, version of virus signature database 4219 (20090705) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com
