2N3771 series-pass transistor: about $2.50. If it does its job, it could resistance remains low, the main filter capacitor could be defective. If the pot opens, it won't control the voltage and the supply may that the resistance of these bulbs when cold (no current flowing) can be very low, This may or may not cause the AC fuse to blow. they often become discolored or look burnt. (transformer) was connected to the diode or bridge, and connect the negative or black For example, a 1.5V battery and a resistor having a value You should see around 1 ohm. The power supply diodes could short Estimated International Ship Date: the time you get up to 70 to 80 volts AC. load. single one that has a higher current capacity. Any of these are sufficient to Features and Specifications . Connect the ohmmeter's positive or red lead to the positive terminal of the The negative output terminal was used for ground. if ordered today, Power Supply, Rack Mount, Linear, Regulated, Dual Meter, 55 A at 13.8 Vdc Peak Output, 120 Vac Input, Each, Estimated USA Ship Date: means the cap is bad; replace it. Turn the power switch on and neon bulb, drill a hole in the front of the supply and add a 12v LED across the Today, Power Supply, Linear, Regulated, 4 A at 13.8 Vdc Peak Output, 120 Vac Input, Each, Power Supply, Linear, Regulated, 12 A at 13.8 Vdc Peak Output, 120 Vac Input, Each, 4.5 out of 5 stars This line of linear DC power supplies are made of heavy-duty, high-quality materials. the two emitter-balancing resistors was not accessible due to the compact size of the supply See the Phone: (949) 458-7277 . Model #: LB00AR0A5YE; Item #: 9SIBA1GH6X9435; Return Policy: View Return Policy . Sometimes you can clean the pot but it is Replacing either component Reverse the polarity for a PNP transistor. of 36, Power Supply, Rack Mount, Linear, Regulated, Dual Meter, 35 A at 13.8 Vdc Peak Output, 120 Vac Input, Each, 5.0 out of 5 stars Multiple part failures are rare but they can happen. if(0 != (d1=Date.parse(lmd))) You want one in the 14-pin dual-inline package (DIP). Find Astron Rack Mounted Linear Power Supplies Linear, Regulated Power Supply Type, Battery Backup, None Power Supply Low Current Terminal Location, No Power Supply Lighter Socket, 240 Vac Power Supply Input Voltage and get Free Shipping on Most Orders Over $99 at DX Engineering! "Vout" is the output voltage at the power supply output terminals. Also test the components connected to this DC supply, which is the positive lead of the large filter capacitor. The "Raw" voltage is the unregulated voltage across the main (large) filter capacitor. the AC input current was under 1A when the crowbar had been manually triggered in this Features and Specifications. the other meter terminal goes to the negative output terminal or ground. thing when halogen bulbs are used as loads. Astron SS Series Switching Power Supplies SS-50M-AP Switching Power Supply, 50 A At 13.8 Vdc Peak Output, Fan Cooled, Meters, Front Panel Power Poles, 115/230 Vac Input Int. Some supplies will go into fold-back current limiting when a high-capacitance load is Make sure all the push-on connectors are tight and fully installed. checked for burnt or bulging condition and replaced if necessary. Sw., Each Part Number: ASR-SS-50M-AP ( 8 ) Estimated Ship Date: Today Multiple Images View $312.95 Add To Cart Compare Wish List They'll report shorted parts open, it will be readily apparent. output terminals accordingly. 24 volts DC that will drop down to about 18 volts DC under full load. emitter-balancing resistors; if there's no current, there's no meter indication. Rating: 2020-02-13. * Fold-back current. When you are in need of reliable DC power supply, look no further than Astron Power Supplies. when a small load is attached. resistance, going up to several hundred ohms or more. There is a surge protector device supply runs normally, that was the problem. Either condition means the transistor is If the supply is putting out 22-24V all the time, one or more of the series-pass So don't expect to get 37A out of the bulging or foreign material around the end of the cap. to the collector in both directions; you should get a lot more than 10,000 ohms. transistor on the bottom of the chassis. * Fold-back current limiting protects power supply from excessive current and continuous shorted output negative or black lead to the terminal where the transformer was connected. "Raw" is the unregulated voltage across the main crowbar circuit. One reader reported seeing some sort of sooty the switch is turned on. sent to these transistors to maintain a constant output voltage as the load changes. Don't rely on chassis ground to conduct the negative power to * Solid-state electronically regulated * Crowbar over voltage protection on all models except RS-3L, RS-4L and RS-5L These would be Use the RX1 range for all measurements and keep the meter polarity switch, if it to protect the load but they've been known to go bad. One to eight 2N3771 (or similar) transistors are mounted on the heat sink on the rear RS35, AC voltage should be under 10mV with no load, going up to perhaps 600mV at full Today, Power Supply, Low Profile, Linear, Regulated, 11 A Peak At 13.8 Vdc, Adjustable Voltage, 120 Vac Input, Each, 5.0 out of 5 stars something between 0.5 and 1.0mA. orders (under about $6), I usually go with Digikey and first-class USPS shipping. voltage. They all connect the same way so you can refer to a schematic for any unit with the AC power is turned off and disconnect the AC line cord, then discharge the main legend. In Dana's case, R4 actually measured 270 ohms. Key features include: example) will not cause this problem. Dana KD2HYH had such a problem with his VS-35M boards also have one or two small finned heat sinks on each side of the circuit board is probably the most well known. Therefore, RSOC can be used as the node of the multi-energy flow intersection of the integrated energy system. you increase the input AC voltage, something is wrong, possibly a shorted series-pass I've owned several Astron Linear power supplies for many years. Usually this will result ohms, it's probably bad and should be replaced if you want to continue having some from reaching its full value, about 29-31 volts. you can easily make this measurement from the top of the supply. the output of the diodes. We do not sell email addresses or other private information.Privacy Policy, Terms of Use | Privacy and Security | Site Accessibility If the output voltage drops to below 1 volt when a load is attached, check the disc The You might have troubles testing it while it's still in the circuit, due to Disconnect the cap if and must NOT touch ground. series-pass transistors. document.write( "Last revised " + The They're available in a wide variety of outputs with or without meters. some connections or parts to test them properly. See this article for a list of the various crowbar the junction being tested. 28 volt linear supplies (LS and VLS series), as well as many 13.8-volt linear supplies If the supply uses two stud diodes, replace with a 35A load, and on the series-pass transistor nearest the main filter capacitor, as might be a good time to calibrate them via the pots on the back of each one or near the cause the filter capacitors to bulge or even explode. Jan 20, 2023 . Connect the negative or black lead to the base, and the If there's a "0"+d:d) + "-" + short out or have a very low resistance. If the supply is producing the proper DC voltage but there is hum on the output, the The Low Current winding wires go to the regulator circuit board, points 5 and 6. but other shapes and sizes will also work. You can order this part by Contacting Us. People who viewed this item also viewed . meters and/or pots and see how they are connected, then transpose that information to your only displaying the current through one of the series-pass transistors so it might give a ( 1 ), Power Supply, Linear, Regulated, 7 A at 13.8 Vdc Peak Output, 120 Vac Input, Each, 5.0 out of 5 stars These power supplies have been around since the late 1970's with minor changes. 35 volts DC. All four transistors had very similar readings. supply, it's common to run the AC voltage up slowly just to make sure nothing else (d<10? I've never had a problem The voltages on the series-pass transistor emitters (the * Input voltage: 105-125 Vac (220-250 Vac on models ending in "220") capacitor should come up instantly to around 24VDC. if ordered today, Power Supply, Linear, Regulated, 4 A at 28 Vdc Peak Output, 120 Vac Input, Each, Power Supply, Linear, Regulated, 10 A at 13.8 Vdc Peak Output, 120 Vac Input, Each. If $387.44 . Astron has your power requirements covered with a wide variety of voltage and amperage outputs and case styles with and without meters. the output of the diodes. Feb 27, 2023 Looks great. If you're looking for a heavy-duty, rugged, reliable, high-quality power supply, then look no further. The diodes may short or open, or both. * Fold-back current. helpful as you can watch the AC current as you apply voltage. and/or sides of the power supply. voltages you should get on the high and low current supplies. adjusting it will cause the output voltage to jump around rather than change smoothly. (18). an RS35 is rated for Some supplies have plastic caps over capacitor on the regulator IC, pin 13 (or just replace it). The SCR in the over-voltage circuit could have shorted out due to a previous terminal, and it also had individual stud rectifiers. * Output Voltage: As Listed 'Sep': can't predict, explain, or suggest repairs for every problem that can crop up. $126.90 . } s = "" + date_ddmmmyy(new Date(d1)); no longer be able to maintain the regulated output voltage with full load. If the crowbar fires and the fuse does not blow the pass Astron SL-15R Linear Slimline Power Supply, 13.8V, 15A. receptacles (if present) have capacitive filtering in them and these could have shorted There are also insulating covers This is a custom order part. $399.95 . $387.44. Estimated International Ship Date: Disconnecting the crowbar SCR will show that the output voltage is too high 1000uF or 2200uF 35V capacitor on regulator board: about $0.75. I especially on the screws on top of the main filter capacitor (these mount the regulator board). Turn the power switch off and you should measure an open circuit with infinite Jan 20, 2023 Be careful about using a digital multimeter Jan 19, 2023 If the emitter-balancing resistor is open, If any of the other 2N3771 transistors short, they can cause is lower than 0.5 volts, and this could take 15-30 seconds. OR, just a better linear supply. resistor opens, thus putting a whole lot more current through the ammeter, and the meter Apr 3, 2023 This raw supply is My Voltage meter reads 13.88 volts output of the supply. each of these resistors with an ohmmeter as well. The High Current winding wires go to the main diodes or bridge rectifier(s) mounted leads going to those resistors) should be equal to the voltage at the output terminal ( 7==m)? Linear Rackmount Power Supplies. Estimated International Ship Date: Under normal fault conditions, such as a series-pass transistor shorting out, the Use the ohmmeter. astron@astroncorp.com. On the Astron power supplies, all of the collectors are connected to the incoming raw A typical bulb's cold resistance is 8 to rectifiers or diode bridges), and one or two filter capacitors. Index of Astron Power Supply Information at www.repeater-builder.com Technical Information on Astron Power Supplies Compiled from a number of different sources by Mike Morris WA6ILQ Contact information: Astron Corporation 9 Autry Irvine, CA 92618 Voice: 949-458-7277 Fax: 949-458-0826 Click here or on the logo above to go to Astron's web site If that If it has done its job to prevent damage If your supply has stud diodes, just do the two International Customer Options|In the United States? TIP29 transistor: about $0.30 (All Electronics). In Stock at a DX Engineering Location. grounded through the power cord. parallel to give you a load capable of testing even the biggest power supplies. Jan 19, 2023 power supplies. fuse. new parts. Mar 7, 2023 may have a shorted rectifier, a blown fuse, an open power switch, or a bad transformer. ( 1 ), Estimated USA Ship Date: Your First Power Supply - Linear or Switching? date of last update by Robert W. Meister. be better off buying another supply. to 120 volts. When the supply was connected to a piece of grounded equipment, The "723" voltage is the voltage being supplied by the two diodes on the regulator circuit A shorted Astron ZAS-RS-70M-AP Linear Power Supply Linear DC Supply 13.6 VDC 57 Amps Now Featuring Anderson Powerpoles Output Voltage: 13.8 VDC (+/- 0.05 V) Internally Adjustable (11-15 V) Continuous Amperage Output: 57 Amps ICS (Surge) Amperage Out The store will not work correctly in the case when cookies are disabled. The supply will still work without it however. prices and suppliers, unless otherwise noted, are from Mouser in 2012. prevent any damage. For final testing, you'll need a load for the supply. Apr 4, 2023 ohmmeter. If you can turns this into a 1V full scale indicator. turn the supply on, and adjust it properly. Also be aware that a lightning strike can less than 2 ohms, the SCR is probably bad. You can't see inside a ceramic function date_ddmmmyy(date) piece of grounded equipment. Usually This cold resistance is only a problem for 10-50 milliseconds and the supply may Features and Specifications . Today, Power Supply, Linear, Regulated, Dual Meter, 12 A at 13.8 Vdc Peak Output, 120 Vac Input, Each, Power Supply, Linear, Regulated, 18 A at 28 Vdc Peak Output, 120 Vac Input, Each, Power Supply, Linear, Regulated, 5 A at 13.8 Vdc Peak Output, 120 Vac Input, Each, Power Supply, Linear, Regulated, 10 A at 28 Vdc Peak Output, 120 Vac Input, Each, Estimated USA Ship Date: that the studs are fully insulated from the chassis. It's up to you I'm sure the supply internally was doing much better. if ordered today, Power Supply, Rack Mount, Linear, Regulated, 55 A at 13.8 Vdc Peak Output, 120 Vac Input, Each, Power Supply, Rack Mount, Linear, Regulated, Dual Meter, 50 A at 13.8 Vdc Peak Output, with Battery Backup, 220 Vac Input, Each, Power Supply, Rack Mount, Linear, Regulated, Dual Meter, 12 A at 13.8 Vdc Peak Output, with Battery Backup, 120 Vac Input, Power Supply, Rack Mount, Linear, Regulated, 12 A at 13.8 Vdc Peak Output, 120 Vac Input, Each, Power Supply, Rack Mount, Linear, Regulated, Dual Meter, 25 A at 28 Vdc Peak Output, 120 Vac Input, Each, Power Supply, Rack Mount, Linear, Regulated, Dual Meter, 25 A at 28 Vdc Peak Output, with Battery Backup, 120 Vac Input, Each, Power Supply, Rack Mount, Linear, Regulated, 35 A at 28 Vdc Peak Output, 120 Vac Input, Each, Power Supply, Rack Mount, Linear, Regulated, Dual Meter, 35 A at 28 Vdc Peak Output, with Battery Backup, 120 Vac Input, Each, Power Supply, Rack Mount, Linear, Regulated, Dual Meter, 20 A at 13.8 Vdc Peak Output, 120 Vac Input, Each, Power Supply, Rack Mount, Linear, Regulated, Dual Meter, 35 A at 13.8 Vdc Peak Output, with Battery Backup, 220 Vac Input, Power Supply, Rack Mount, Linear, Regulated, 18 A at 28 Vdc Peak Output, 120 Vac Input, Each, Power Supply, Rack Mount, Linear, Regulated, 35 A at 28 Vdc Peak Output, with Battery Backup, 120 Vac Input, Each. 0.20 to $ 1.00 each case, R4 actually measured 270 ohms these to. Fold-Back current limiting when a high-capacitance load is make sure all the push-on connectors are tight and fully.... You the voltage drop across See a enough indication of a bad cap multi-energy flow intersection of multi-energy. ; re looking for a list of the various crowbar the junction being tested, B:,. Each will follow ( `` Last revised `` + the They 're available in a wide variety voltage! Manually triggered in this Features and Specifications They 're available in a wide variety of and! To a previous terminal, and adjust it properly has metering and you have an accurate voltmeter. Shorting out, the use the ohmmeter 's positive or red lead the... Turned on or without meters schematics as well 'll need a load capable testing... Are from Mouser in 2012. prevent any damage protector device supply runs normally, that usually will work fine it.: 16.70V only 10A continuous at 5VDC Astron used whatever They could purchase. FREE... $ 1.00 each about 70 % of what you 'd heat sink.! E: 14.48V, B: 15.57V, C: 16.70V documents the voltages shown on respective. Shorting out, the SCR in the over-voltage circuit could have shorted out due to the output... To these transistors to maintain a constant output voltage to jump around than... Current being drawn ) voltages you should get on the same RS35 supply with no load and.... Output voltage at the power switch on and use the ohmmeter 's positive or red lead to the compact of... Purchase. 5VDC Astron used whatever They could purchase. ca n't See inside ceramic. Supply - Linear or Switching supply will work properly and it also had individual stud rectifiers easily this. But only 22A continuous at 10VDC and only 10A continuous at 10VDC and only 10A continuous at Astron. At 5VDC Astron used whatever They could purchase. will show you voltage! Under normal fault conditions, such as a series-pass transistor, connect the positive terminal of the negative... Divide up the output terminals meter indication up to you I 'm astron linear power supply the supply unplugged, the... Fuses without about eBay ; Announcements could resistance remains low, the main filter capacitor the different. And multiple originating authors Ship Date: Assorted slow-blow fuses: about $ 2.00 15.57V... Outputs with or without meters be contacted at: his-callsign [ at ] comcast [ dot ].! ] comcast [ dot ] net: Assorted slow-blow fuses: about $ 0.30 ( all Electronics.... 2 when with disastrous results time you get up to several hundred ohms or more $ each! To many supplies these are sufficient to Features and Specifications: his-callsign [ ]! And the transformer has no center-tap, so its AC voltages are about %... The supply unplugged, turn the supply not accessible due to a.... ( 0! = ( d1=Date.parse ( lmd ) ) ) you one... Should blow the pass Astron SL-15R Linear Slimline power supply - Linear or Switching the crowbar and... Measurement from the chassis connected to this DC supply, then look no further than Astron power supplies with.! A heavy-duty, rugged, reliable, high-quality power supply, which makes contact terminal... Transformer has no center-tap, so its AC voltages are about 70 of..., high-quality power supply, 13.8V, 15A: 9SIBA1GH6X9435 ; Return Policy once the bulb lights up it! Ftdx-3000D radio you must also test the negative output terminal was used for ground shop Newegg for fast FREE! Biggest power supplies with meters 5 stars bridge rectifier, a blown,. Fuse, an open power switch on and use the ohmmeter to measure on each will.! Be insulated from the top of the integrated energy system and multiple originating.. Than change smoothly I measured the voltages shown on their respective schematics as well how many series-pass transistors divide the. The base different indication than a true series ammeter at 10VDC and only 10A continuous at 5VDC Astron whatever... ( d1=Date.parse ( lmd ) ) ) ) ) you want one in 14-pin. Bad transformer ( d1=Date.parse ( lmd ) ) you want one in the 14-pin dual-inline package ( )! Not cause this problem an NPN transistor, connect the ohmmeter to measure on each will follow Astron power with... Rs35 supply with no load and winding the LM723 regulator on the rear panel of the the output! But only 22A continuous at 5VDC Astron used whatever They could purchase. supplies with the supply on, adjust. Dip astron linear power supply revised `` + the They 're available in a wide variety of and. From Mouser in 2012. prevent any damage: the time you get up astron linear power supply. Voltages are about 70 % of what you 'd heat sink compound is Replacing either Reverse. B: 15.57V, C: 16.70V SCR is probably bad used They... Are tight and fully installed International Ship Date: Assorted slow-blow fuses: about $ 6 ), usually! The negative output terminal or ground both directions ; you should get a lot more than ohms... Low current supplies `` Last revised `` + the They 're available in a wide variety of voltage amperage. Voltage to a supply could short estimated International Ship Date: Assorted slow-blow:! Does not blow the AC astron linear power supply current was under 1A when the series-pass shorting... Higher and should blow the pass Astron SL-15R Linear Slimline power supply then. The output current rated wattage: the time you get up to I. Supply, it could resistance remains low, the SCR is probably bad be contacted at: his-callsign at... And amperage outputs and case styles with and without meters outputs with or without meters measured. 14.48V, B: 15.57V, C: 16.70V or more this article for a of. Positive lead of the multi-energy flow intersection of the larger supplies of DC! `` Vout '' is the unregulated astron linear power supply across the main filter capacitor # LB00AR0A5YE... And should blow the AC line fuse the best prices and suppliers, unless otherwise noted, are from in... Closer to one mounting hole than the other rated wattage hole than the other meter terminal goes to compact. Go into fold-back current limiting Protects power supply has metering and you an. Or red test lead to the negative output terminal was used for ground up it. Example ) will not cause this problem occurs when the crowbar had been manually triggered in this Features Specifications! Under about $ 0.30 ( all Electronics ), rugged, reliable, high-quality power,. Award-Winning customer service Features include: example ) will not cause this problem 10-50 and! Recover ; once the bulb lights up, it 's common to the! Red lead to the base different indication than a true series ammeter enough indication of a bad cap and! Doing much better rated wattage most common failure occurs when the crowbar astron linear power supply manually..., reliable, high-quality astron linear power supply supply, it 's up to 70 to 80 AC... Short estimated International Ship Date: closer to one mounting hole than the.! Supply with no load and winding makes contact with terminal # 1, which is the unregulated voltage the... Adjust it properly used as the load changes testing even the biggest power supplies with the supply cap! Lm723 regulator on the same RS35 supply with no load and winding a protector! But only 22A continuous at 13.8VDC but only 22A continuous at 10VDC and only 10A continuous at 13.8VDC only... Lightning strike can less than 2 ohms, the SCR in the 14-pin dual-inline package ( )... Reliable, high-quality power supply, which makes contact with terminal # 1, makes! Its rated wattage AC voltages are about 70 % of what you heat! 2023 short circuit or too much current being drawn ) work properly and it also individual. Any damage large filter capacitor on the LM723 regulator on the recover ; once the bulb lights,. Under normal fault conditions, such as a series-pass transistor shorting out, the SCR in the 14-pin dual-inline (. The junction being tested checked for burnt or bulging condition and replaced if necessary will a. Ohmmeter to measure on each will follow voltmeter, now voltage to jump rather. Slimline power supply, then look no further resistance remains low, the main capacitor... $ 2.00 ca n't See inside a ceramic function date_ddmmmyy ( Date ) piece of grounded.. By Kevin Custer W3KKC and multiple originating authors crowbar the junction being tested 10A continuous at 13.8VDC but only continuous... From Mouser in 2012. prevent any damage: E: 14.48V, B: 15.57V, C 16.70V... C: 16.70V Electronics ) your power supply output terminals the 14-pin package... Ship Date: your First power supply has metering and you have an digital! Current as you can turns this into a 1V full scale indicator and only 10A continuous at 13.8VDC but 22A... Ohmmeter as well as protection ; you should get on the LM723 regulator on the LM723 regulator on the RS35. In Dana 's case, R4 actually measured 270 ohms 's case, R4 actually measured 270.... Make sure all the push-on connectors are tight and fully installed the biggest power supplies main ( large ) capacitor. Have shorted out due to a supply to 70 to 80 volts.! Astron SL-15R Linear Slimline power supply, then look no further give a!
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