![]() | All Advertisers |
| Member Services Directory | Classifieds | Reviews | Jobs | Deal Zone | Merchandise | Marketplace | Facebook App | Books, DVDs & Gadgets | Video Vault | Tips & Techniques |
| |||||||
New Reply | Thread Tools | Search this Thread |
| | #1 |
| Gear interested Joined: Feb 2008 Location: Nashville
Posts: 5
Thread Starter | DIY 48V Supply - Need a Schem
I need to build a 48V supply for a single mic-pre. Anyone have a solid and simple schem for me to build. I understand schems, I just don't understand theory enough to design. I can make 48V with just a tranny, rect., and cap but I don't trust it for long term. I would like to use some kind of regulator. Any help
|
| | |
| | #2 |
| Lives for gear Joined: Sep 2004 Location: UK
Posts: 4,822
|
Hi Cheapest and easiest for a single mic is a cap, resistor, cap resistor cap with zener diode (s). Caps say 220 or 470 uF 100 Volt working. Resistors to suit voltage to be dropped at 20mA. The max current draw from a phantom connected mic is 14mA and normally about 5mA. If you get the zener (s) to draw about 20mA this will be sufficient. Use 2 , 24 Volt 1.3 watt zeners in series to get 48 Volts. About 1 watt total will be dissipated over the two zeners. The transformer and rectifier should give you about 60 Volts DC so needs about 45 to 50 Volts AC. Matt S |
| | |
| | #3 |
| Gear interested |
I would say just check out Mouser and get a pre-built 48V PSU. They may also sell kits. Either way, they are pretty affordable and good quality. Regulated and all!
|
| | |
| | #4 |
| Lives for gear Joined: Aug 2006 Location: Phila, PA/Upstate MA
Posts: 3,432
|
FWIW: 5Fish and JLM audio have very good multiple PS kits with 48V rails....
|
| | |
New Reply
Facebook
Twitter
LinkedIn
| Thread Tools | Search this Thread |
| Similar Threads | ||||
| Thread | Thread starter | Forum | Replies | Last Post |
| 48V from board to mic's power supply. Really bad? | schizojames | Geekslutz forum | 2 | 8th December 2005 09:13 AM |
| 48v phantom power supply | dumbleator | High end | 2 | 6th July 2004 12:03 AM |
| |