I think what Matt was talking about was a TL-783
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=296-20687-5-ND.
best,
Ike
eliya gwetta wrote:
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] <mailto:[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
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Ike Zimbel
Zimbel Audio Productions Ltd.
Toronto
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"Studio House Calls" - Repairs and upgrades to analog audio equipment including:
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