Atom Feed - Twisted Pear Audio Support - Forum:LCBPS/LCDPS Power SuppliesTwisted Pear Audio Support - Atom Feedurn:twistedpearaudio-com:AtomFeed:TwistedPearAudioSupport:Forum:LCBPS/LCDPSPowerSupplies:1Copyright 2024 Twisted Pear Audio Support2024-03-29T00:54:03Zhttp://www.twistedpearaudio.com/forum/Images/YAFLogo.pngForum Adminhttp://www.twistedpearaudio.comfeedback@twistedpearaudio.comBrian Doneganhttp://www.twistedpearaudio.com/forum/profile/8-Brian-DoneganBrian Doneganhttp://www.twistedpearaudio.com/forum/profile/8-Brian-Doneganaaron.luebkehttp://www.twistedpearaudio.com/forum/profile/27035-aaron-luebkemiklauhttp://www.twistedpearaudio.com/forum/profile/26910-miklauMartinC700http://www.twistedpearaudio.com/forum/profile/3616-MartinC700zaubertubahttp://www.twistedpearaudio.com/forum/profile/26777-zaubertubaBrian Doneganhttp://www.twistedpearaudio.com/forum/profile/8-Brian-DoneganAlanHhttp://www.twistedpearaudio.com/forum/profile/26266-AlanHsparkyhttp://www.twistedpearaudio.com/forum/profile/26620-sparkycrazy bill the eel killerhttp://www.twistedpearaudio.com/forum/profile/5200-crazy-bill-the-eel-killerBrian Doneganhttp://www.twistedpearaudio.com/forum/profile/8-Brian-DoneganBrian Doneganhttp://www.twistedpearaudio.com/forum/profile/8-Brian-Donegannoviygerahttp://www.twistedpearaudio.com/forum/profile/2855-noviygeraBrian Doneganhttp://www.twistedpearaudio.com/forum/profile/8-Brian-Donegangwiksehttp://www.twistedpearaudio.com/forum/profile/6332-gwikseDQ828http://www.twistedpearaudio.com/forum/profile/3308-DQ828avr300http://www.twistedpearaudio.com/forum/profile/396-avr300Brian Doneganhttp://www.twistedpearaudio.com/forum/profile/8-Brian-Doneganneofeedhttp://www.twistedpearaudio.com/forum/profile/25635-neofeedBrian Doneganhttp://www.twistedpearaudio.com/forum/profile/8-Brian-DoneganRuss Whitehttp://www.twistedpearaudio.com/forum/profile/9-Russ-WhiteYetAnotherForum.NETurn:twistedpearaudio-com:ftTopics:st1:tid4155:lmid25610:1Will centaur fit in 1U?<table class="content postContainer_Alt" width="100%"><tr><td>68mm / 2-5/8" with included .5" standoffs.</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m25610-Will-centaur-fit-in-1U#post25610" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>2019-04-02T12:29:18-07:002019-04-02T12:29:18-07:00Brian Donegan<table class="content postContainer_Alt" width="100%"><tr><td>68mm / 2-5/8" with included .5" standoffs.</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m25610-Will-centaur-fit-in-1U#post25610" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>urn:twistedpearaudio-com:ftTopics:st1:tid4149:lmid25588:1LCDPS only powering one side?<table class="content postContainer_Alt" width="100%"><tr><td>I picked up a BIII build from a friend and it's working fine but I'm going to change it up a bit and go to a USB only input. So I'm definitely not very well versed in this product but I am adept at slinging solder and changing wires around.<br /><br />Before changing this around I checked the voltages and found that the LCDPS right side output (as viewing from the output in front of me, inputs to the back) has no voltage and then noticed that R4 and R3 are just jumpered. I have adjustable 5v on the other side. Both inputs are measuring around 11v from a 9v transformer. R1 and R2 are 10 ohm, 3 watt.<br /><br />If this is normal I'm good with it but I can't find anything to tell me if there is an issue here. I just don't want to start the changes I'm planning and then find out I should have fixed something first.<br /><br />Thanks,<br />Aaron</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m25588-LCDPS-only-powering-one-side#post25588" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>2019-03-14T20:41:03-07:002019-03-14T20:41:03-07:00aaron.luebke<table class="content postContainer_Alt" width="100%"><tr><td>I picked up a BIII build from a friend and it's working fine but I'm going to change it up a bit and go to a USB only input. So I'm definitely not very well versed in this product but I am adept at slinging solder and changing wires around.<br /><br />Before changing this around I checked the voltages and found that the LCDPS right side output (as viewing from the output in front of me, inputs to the back) has no voltage and then noticed that R4 and R3 are just jumpered. I have adjustable 5v on the other side. Both inputs are measuring around 11v from a 9v transformer. R1 and R2 are 10 ohm, 3 watt.<br /><br />If this is normal I'm good with it but I can't find anything to tell me if there is an issue here. I just don't want to start the changes I'm planning and then find out I should have fixed something first.<br /><br />Thanks,<br />Aaron</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m25588-LCDPS-only-powering-one-side#post25588" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>urn:twistedpearaudio-com:ftTopics:st1:tid4082:lmid25357:1Voltage ouput drop on LCDPS<table class="content postContainer_Alt" width="100%"><tr><td>Supplying the LCDPS with a 9v AC transformer solved the problem and I now have a stable supply. The voltage dropout was to great once loaded when supplied with the 7v transformer. <br /><br /></td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m25357-Voltage-ouput-drop-on-LCDPS#post25357" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>2018-06-06T14:18:34-07:002018-06-06T14:18:34-07:00miklau<table class="content postContainer_Alt" width="100%"><tr><td>Supplying the LCDPS with a 9v AC transformer solved the problem and I now have a stable supply. The voltage dropout was to great once loaded when supplied with the 7v transformer. <br /><br /></td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m25357-Voltage-ouput-drop-on-LCDPS#post25357" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>urn:twistedpearaudio-com:ftTopics:st1:tid4042:lmid25141:1LCDPS R1, R2 Values<table class="content postContainer_Alt" width="100%"><tr><td>Hi,<br /><br />I note in the description for the LCDPS high current version, it mentions that the regulators, caps and power resistors are changed. On the kit supplied the regs and caps are indeed changed, but the power resistor is still a 2R7 3W resistor as shown in the BOM for the standard version. I this the correct value resistor?<br /><br />Thank you<br /><br />Martin</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m25141-LCDPS-R1--R2-Values#post25141" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>2017-12-31T06:59:19-07:002017-12-31T06:59:19-07:00MartinC700<table class="content postContainer_Alt" width="100%"><tr><td>Hi,<br /><br />I note in the description for the LCDPS high current version, it mentions that the regulators, caps and power resistors are changed. On the kit supplied the regs and caps are indeed changed, but the power resistor is still a 2R7 3W resistor as shown in the BOM for the standard version. I this the correct value resistor?<br /><br />Thank you<br /><br />Martin</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m25141-LCDPS-R1--R2-Values#post25141" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>urn:twistedpearaudio-com:ftTopics:st1:tid3974:lmid24886:1LCBPS Catastrophic User Error<table class="content postContainer_Alt" width="100%"><tr><td><div class="quote"><span class="quotetitle">Originally Posted by: Brian Donegan <a href="/forum/posts/m24884-LCBPS-Catastrophic-User-Error#post24884"><img src="/forum/Themes/BlackGrey/icon_latest_reply.png" title="Go to Quoted Post" alt="Go to Quoted Post" /></a></span><blockquote>Capacitors will generally test as open with a continuity meter (depending on the meter). You should use a capacitance meter if possible.</div></div><br />Yeah, my MultiMeter is pretty cheap, maybe time for an upgrade. ;)<br /><br /><div class="quote"><span class="quotetitle">Quote:</span><blockquote>What is the AC input voltage? 28V would suggest something close to 20VAC.</div></div><br />I'm using an 18V-0-18V Transformer, it's inputting about 21.5V AC<br /><br /><div class="quote"><span class="quotetitle">Quote:</span><blockquote>Is it possible you damaged the through-hole plating when desoldering?</div></div><br />You nailed it...I messed up the via on the LM317 pin two--the top pad was open to the pin. Soldering the top pad to the pin fixed it. Muchas Gracias! :)</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m24886-LCBPS-Catastrophic-User-Error#post24886" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>2017-02-26T23:04:58-07:002017-02-26T23:04:58-07:00zaubertuba<table class="content postContainer_Alt" width="100%"><tr><td><div class="quote"><span class="quotetitle">Originally Posted by: Brian Donegan <a href="/forum/posts/m24884-LCBPS-Catastrophic-User-Error#post24884"><img src="/forum/Themes/BlackGrey/icon_latest_reply.png" title="Go to Quoted Post" alt="Go to Quoted Post" /></a></span><blockquote>Capacitors will generally test as open with a continuity meter (depending on the meter). You should use a capacitance meter if possible.</div></div><br />Yeah, my MultiMeter is pretty cheap, maybe time for an upgrade. ;)<br /><br /><div class="quote"><span class="quotetitle">Quote:</span><blockquote>What is the AC input voltage? 28V would suggest something close to 20VAC.</div></div><br />I'm using an 18V-0-18V Transformer, it's inputting about 21.5V AC<br /><br /><div class="quote"><span class="quotetitle">Quote:</span><blockquote>Is it possible you damaged the through-hole plating when desoldering?</div></div><br />You nailed it...I messed up the via on the LM317 pin two--the top pad was open to the pin. Soldering the top pad to the pin fixed it. Muchas Gracias! :)</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m24886-LCBPS-Catastrophic-User-Error#post24886" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>urn:twistedpearaudio-com:ftTopics:st1:tid3949:lmid24790:1LCBPS missing resistors??<table class="content postContainer_Alt" width="100%"><tr><td>I will contact you directly.</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m24790-LCBPS-missing-resistors#post24790" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>2016-12-20T18:50:23-07:002016-12-20T18:50:23-07:00Brian Donegan<table class="content postContainer_Alt" width="100%"><tr><td>I will contact you directly.</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m24790-LCBPS-missing-resistors#post24790" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>urn:twistedpearaudio-com:ftTopics:st1:tid3903:lmid24507:1LCDPS heat sinks very hot<table class="content postContainer_Alt" width="100%"><tr><td>Thanks so much for the reassurance guys, have a great day :-)</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m24507-LCDPS-heat-sinks-very-hot#post24507" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>2016-08-24T03:20:24-07:002016-08-24T03:20:24-07:00AlanH<table class="content postContainer_Alt" width="100%"><tr><td>Thanks so much for the reassurance guys, have a great day :-)</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m24507-LCDPS-heat-sinks-very-hot#post24507" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>urn:twistedpearaudio-com:ftTopics:st1:tid3673:lmid24119:1LCBPS old version schematic<table class="content postContainer_Alt" width="100%"><tr><td>Hi, I have a couple of these boards I'm fettling with a capacitance multiplier in place of one of the RC resistors. Schematics would be really useful. Are they available?<br /><br />Thanks!</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m24119-LCBPS-old-version-schematic#post24119" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>2016-03-21T06:58:08-07:002016-03-21T06:58:08-07:00sparky<table class="content postContainer_Alt" width="100%"><tr><td>Hi, I have a couple of these boards I'm fettling with a capacitance multiplier in place of one of the RC resistors. Schematics would be really useful. Are they available?<br /><br />Thanks!</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m24119-LCBPS-old-version-schematic#post24119" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>urn:twistedpearaudio-com:ftTopics:st1:tid3655:lmid22843:1LCDPS Max curent<table class="content postContainer_Alt" width="100%"><tr><td>Hello guys,<br />I'm starting my tube amp project, and I'll be using DC on the filaments to keep noise as low as possible, as the amp will also be doing double duty as a headphone amp. I've got a few of the LCDPS supplies in house from my planned COD build ( on hold as my rich buddy gave me his Weiss DAC202, so I'm not in as hurry to build the COD ), so I'd like to use one of them for the DC filament supply. I need no more than an amp from each supply ( I plan on using a single transfo and one supply for the input stage and one supply for the output stage, hence an amp at most from each supply. Will the LCDPS do it. I don't know enough about solid state stuff to be able to figure it out from the spec sheets.<br /><br />As always, thanks in advance for any help.<br /><br />Cheers, Crazy Bill</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m22843-LCDPS-Max-curent#post22843" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>2015-07-22T04:08:05-07:002015-07-22T04:08:05-07:00crazy bill the eel killer<table class="content postContainer_Alt" width="100%"><tr><td>Hello guys,<br />I'm starting my tube amp project, and I'll be using DC on the filaments to keep noise as low as possible, as the amp will also be doing double duty as a headphone amp. I've got a few of the LCDPS supplies in house from my planned COD build ( on hold as my rich buddy gave me his Weiss DAC202, so I'm not in as hurry to build the COD ), so I'd like to use one of them for the DC filament supply. I need no more than an amp from each supply ( I plan on using a single transfo and one supply for the input stage and one supply for the output stage, hence an amp at most from each supply. Will the LCDPS do it. I don't know enough about solid state stuff to be able to figure it out from the spec sheets.<br /><br />As always, thanks in advance for any help.<br /><br />Cheers, Crazy Bill</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m22843-LCDPS-Max-curent#post22843" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>urn:twistedpearaudio-com:ftTopics:st1:tid3636:lmid22755:1LCDPS: trying to get 6v input to 5v output for BBB<table class="content postContainer_Alt" width="100%"><tr><td>Can you confirm that the two voltage regulators are both LM317, not LM337?</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m22755-LCDPS--trying-to-get-6v-input-to-5v-output-for-BBB#post22755" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>2015-06-10T18:24:43-07:002015-06-10T18:24:43-07:00Brian Donegan<table class="content postContainer_Alt" width="100%"><tr><td>Can you confirm that the two voltage regulators are both LM317, not LM337?</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m22755-LCDPS--trying-to-get-6v-input-to-5v-output-for-BBB#post22755" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>urn:twistedpearaudio-com:ftTopics:st1:tid3452:lmid22715:1LCBPS Availability in the next month or two?<table class="content postContainer_Alt" width="100%"><tr><td>Sorry, fixed. In stock now.</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m22715-LCBPS-Availability-in-the-next-month-or-two#post22715" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>2015-05-18T20:32:38-07:002015-05-18T20:32:38-07:00Brian Donegan<table class="content postContainer_Alt" width="100%"><tr><td>Sorry, fixed. In stock now.</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m22715-LCBPS-Availability-in-the-next-month-or-two#post22715" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>urn:twistedpearaudio-com:ftTopics:st1:tid3529:lmid21977:1LCBPS component clarification<table class="content postContainer_Alt" width="100%"><tr><td>thanks for clarifying.</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m21977-LCBPS-component-clarification#post21977" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>2014-12-22T22:18:01-07:002014-12-22T22:18:01-07:00noviygera<table class="content postContainer_Alt" width="100%"><tr><td>thanks for clarifying.</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m21977-LCBPS-component-clarification#post21977" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>urn:twistedpearaudio-com:ftTopics:st1:tid3470:lmid21648:1Back in stock<table class="content postContainer_Alt" width="100%"><tr><td>LCBPS are back in stock</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m21648-Back-in-stock#post21648" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>2014-10-17T21:19:13-07:002014-10-17T21:19:13-07:00Brian Donegan<table class="content postContainer_Alt" width="100%"><tr><td>LCBPS are back in stock</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m21648-Back-in-stock#post21648" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>urn:twistedpearaudio-com:ftTopics:st1:tid2938:lmid21643:1What parts to omit when using "superregulators" like Belleson?<table class="content postContainer_Alt" width="100%"><tr><td>These have been running 24/7 since the last post. No issues. <br /><br />I recently swapped my Ivy3 for a Legato 3.1.<br />The +-15V 500mA regulators also seem to handle this with no issue.<br /></td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m21643-What-parts-to-omit-when-using--superregulators--like-Belleson#post21643" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>2014-10-16T13:01:27-07:002014-10-16T13:01:27-07:00gwikse<table class="content postContainer_Alt" width="100%"><tr><td>These have been running 24/7 since the last post. No issues. <br /><br />I recently swapped my Ivy3 for a Legato 3.1.<br />The +-15V 500mA regulators also seem to handle this with no issue.<br /></td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m21643-What-parts-to-omit-when-using--superregulators--like-Belleson#post21643" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>urn:twistedpearaudio-com:ftTopics:st1:tid3359:lmid21258:1Old LCBPS Current<table class="content postContainer_Alt" width="100%"><tr><td><div class="quote"><span class="quotetitle">Originally Posted by: avr300 <a href="/forum/posts/m21252-Old-LCBPS-Current#post21252"><img src="/forum/Themes/BlackGrey/icon_latest_reply.png" title="Go to Quoted Post" alt="Go to Quoted Post" /></a></span><blockquote><br /><br />Define safely.<br /><br /></div></div><br /><br />free from hurt, injury, danger, or risk: :)<br /><br />I found the problem, didn't solder half of the negative inductor :) Of course it was on the inside half so it was a very difficult thing to see.<br /><br />Anyway, given it's obviously very difficult to give an exact answer to this question, as you say I'll just give it a go & see how hot it gets. As the boys are away I ordered a BP-PSU from DIYINHK which states it can give 1A at 12/15V so I'll have a backup should I need it.<br /><br /> <br /><br /></td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m21258-Old-LCBPS-Current#post21258" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>2014-07-07T12:32:22-07:002014-07-07T12:32:22-07:00DQ828<table class="content postContainer_Alt" width="100%"><tr><td><div class="quote"><span class="quotetitle">Originally Posted by: avr300 <a href="/forum/posts/m21252-Old-LCBPS-Current#post21252"><img src="/forum/Themes/BlackGrey/icon_latest_reply.png" title="Go to Quoted Post" alt="Go to Quoted Post" /></a></span><blockquote><br /><br />Define safely.<br /><br /></div></div><br /><br />free from hurt, injury, danger, or risk: :)<br /><br />I found the problem, didn't solder half of the negative inductor :) Of course it was on the inside half so it was a very difficult thing to see.<br /><br />Anyway, given it's obviously very difficult to give an exact answer to this question, as you say I'll just give it a go & see how hot it gets. As the boys are away I ordered a BP-PSU from DIYINHK which states it can give 1A at 12/15V so I'll have a backup should I need it.<br /><br /> <br /><br /></td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m21258-Old-LCBPS-Current#post21258" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>urn:twistedpearaudio-com:ftTopics:st1:tid3250:lmid20675:118 volts supply<table class="content postContainer_Alt" width="100%"><tr><td>Your worst enemy will be heat. You have 2 options.<br /><br />1.<br />Give the Opus a little more juice.<br /><br />pr. manual<br /><br />"The Opus is designed to utilize separate analog and digital power supplies from 6.5V to 15V."<br /><br />If you settle for 12v, you have less voltage drop across the LCDPS, hence less power to dissipate into the sinks.<br /><br />The metronome is limited to 7.5v, although the onboard regulator is specified to be able to handle up to 16v input. (abs. max)<br /><br /><strong>2.<br />Even better, play safe and find a 2*12v tranny.It won't cost you the world.</strong></td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m20675-18-volts-supply#post20675" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>2014-02-28T21:33:37-07:002014-02-28T21:33:37-07:00avr300<table class="content postContainer_Alt" width="100%"><tr><td>Your worst enemy will be heat. You have 2 options.<br /><br />1.<br />Give the Opus a little more juice.<br /><br />pr. manual<br /><br />"The Opus is designed to utilize separate analog and digital power supplies from 6.5V to 15V."<br /><br />If you settle for 12v, you have less voltage drop across the LCDPS, hence less power to dissipate into the sinks.<br /><br />The metronome is limited to 7.5v, although the onboard regulator is specified to be able to handle up to 16v input. (abs. max)<br /><br /><strong>2.<br />Even better, play safe and find a 2*12v tranny.It won't cost you the world.</strong></td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m20675-18-volts-supply#post20675" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>urn:twistedpearaudio-com:ftTopics:st1:tid3246:lmid20658:1Powering an Arduino and PGA2311 from LCDPS? (and Opus and SPDIF...)<table class="content postContainer_Alt" width="100%"><tr><td><div class="quote"><span class="quotetitle">Originally Posted by: johanwahlberg <a href="/forum/posts/m20653-Powering-an-Arduino-and-PGA2311-from-LCDPS---and-Opus-and-SPDIF#post20653"><img src="/forum/Themes/BlackGrey/icon_latest_reply.png" title="Go to Quoted Post" alt="Go to Quoted Post" /></a></span><blockquote>Okay, not even with its second secondary? Two (+9,-0 and -9,+0) are used by LC<strong>D</strong>PS. I still have +15,-0 and -15,+0 available from the transformer.<br /><br />OR<br /><br />Can I use just the LC<strong>B</strong>PS with all three modules?</div></div><br /><br />Ah, I missed that. You can use the 15V taps for the bipolar supply. Note, however, that the current rating is a little low, and may lead to other problems.</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m20658-Powering-an-Arduino-and-PGA2311-from-LCDPS---and-Opus-and-SPDIF#post20658" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>2014-02-25T15:35:20-07:002014-02-25T15:35:20-07:00Brian Donegan<table class="content postContainer_Alt" width="100%"><tr><td><div class="quote"><span class="quotetitle">Originally Posted by: johanwahlberg <a href="/forum/posts/m20653-Powering-an-Arduino-and-PGA2311-from-LCDPS---and-Opus-and-SPDIF#post20653"><img src="/forum/Themes/BlackGrey/icon_latest_reply.png" title="Go to Quoted Post" alt="Go to Quoted Post" /></a></span><blockquote>Okay, not even with its second secondary? Two (+9,-0 and -9,+0) are used by LC<strong>D</strong>PS. I still have +15,-0 and -15,+0 available from the transformer.<br /><br />OR<br /><br />Can I use just the LC<strong>B</strong>PS with all three modules?</div></div><br /><br />Ah, I missed that. You can use the 15V taps for the bipolar supply. Note, however, that the current rating is a little low, and may lead to other problems.</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m20658-Powering-an-Arduino-and-PGA2311-from-LCDPS---and-Opus-and-SPDIF#post20658" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>urn:twistedpearaudio-com:ftTopics:st1:tid2910:lmid20162:1LCDPS - no voltage - Help Please<table class="content postContainer_Alt" width="100%"><tr><td>Problem solved !<br /><br />Reworked on all solders and everything's fine now :)</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m20162-LCDPS---no-voltage---Help-Please#post20162" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>2013-11-07T08:57:38-07:002013-11-07T08:57:38-07:00neofeed<table class="content postContainer_Alt" width="100%"><tr><td>Problem solved !<br /><br />Reworked on all solders and everything's fine now :)</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m20162-LCDPS---no-voltage---Help-Please#post20162" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>urn:twistedpearaudio-com:ftTopics:st1:tid3134:lmid20005:1Too much current draw for LCDS?<table class="content postContainer_Alt" width="100%"><tr><td>I swapped in the larger heatsinks. Temp dropped from 81C to 57C. At roughly 25C ambient, that's 56C to 32C above ambient. About 43% better cooling, but about 30% overall.</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m20005-Too-much-current-draw-for-LCDS#post20005" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>2013-10-02T23:48:05-07:002013-10-02T23:48:05-07:00Brian Donegan<table class="content postContainer_Alt" width="100%"><tr><td>I swapped in the larger heatsinks. Temp dropped from 81C to 57C. At roughly 25C ambient, that's 56C to 32C above ambient. About 43% better cooling, but about 30% overall.</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m20005-Too-much-current-draw-for-LCDS#post20005" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>urn:twistedpearaudio-com:ftTopics:st1:tid2958:lmid18508:1LCBPS IC1 IC2 parts<table class="content postContainer_Alt" width="100%"><tr><td>IC1 is the LM317. :)<br /><br />Sorry for the trouble. Good catch!</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m18508-LCBPS-IC1-IC2-parts#post18508" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>2013-03-02T19:47:21-07:002013-03-02T19:47:21-07:00Russ White<table class="content postContainer_Alt" width="100%"><tr><td>IC1 is the LM317. :)<br /><br />Sorry for the trouble. Good catch!</td></tr></table><table><tr><td><a href="http://www.twistedpearaudio.com/forum/posts/m18508-LCBPS-IC1-IC2-parts#post18508" ><img src="http://www.twistedpearaudio.com/forum/Themes/BlackGrey/icon_newest_reply.png" alt ="Go to last post" title ="Go to last post" /></a></td></tr><table>