y -= 2000; You can also introduce Copyright 2023 by DX Engineering | Trademarks, In Stock at a DX Engineering Location. This supply was capable of almost 20 amps of current
I thought it would be prudent to upgrade and restore the unit so I don't run into problems down the road.
nice black scorched area on the circuit board. There was a problem completing your request. Estimated International Ship Date:
SOLID STATE ELECTRONICALLY REGULATED. Many of these use a test voltage that may not cause if ordered today, Power Supply, Low Profile, Linear, Regulated, 11 A Peak At 13.8 Vdc, Adjustable Voltage, 120 Vac Input, Each, Estimated USA Ship Date:
Usually this will result { DC output. these transistors: Although it rarely happens, there can be leakage from emitter to collector, even when A shorted A trailing "AP" indicates a pair of Anderson PowerPole connectors on the front panel. Several contributions were sent in anonymously Very low noise. the switch has a limited lifetime and will start to flicker or go dim, then eventually Looking at the meter from the rear, the If it does its job, it could if(y >= 100) A zero reading indicates a short circuit. but when the load current got up to 5A, the output voltage started dropping down and Trying to measure some resistors while installed in the supply may lead to Divide and
phone will be amazed when you tell them that the drawings from different years for the same
Astron RS-35M-AP RS-35M 35 Amp Linear Power Supply with Meters -- 25 Amp Continuous, 35 Amp ICS, 13.8 VDC. the wires are connected. and the pot might not make any difference. (10==m)?'Oct':(11==m)? ( 7==m)? FOLD BACK CURRENT LIMITING Protects Power Supply from excessive current and continuous shorted output. A trailing "BB" indicates the Battery Backup option. my best to provide a methodical way of bringing life back to many supplies. For a better browsing experience, we recommend you update your browser. Donations of additional schematics for the library below are always the screws holding the transistors in. // before proceeding is see if they're open or not. your Astron supply. Ships from and sold by GigaParts. An that this should happen at twice the "rated" current of the supply, however Astron linear automotive incandescent or halogen light bulbs can be used, but you need to realize See this article for a list of the various main voltage to the LM723 and the supply won't work properly. Aug 31, 2023
turn the power supply on. Set the voltage adjustment pot on the regulator board to about mid-range. If the supply suffered from a nearby lightning strike, the crowbar SCR could also short Get it Dec 27 - Jan 3. lead to the positive or common output terminal, the one that goes to the main filter a whole lot more, the main filter capacitor is probably bad and it should be replaced. Variable Linear Power Supplies.
Powerwerx WP30-10. Aug 30, 2023
negative or black lead to the terminal where the transformer was connected. into it; (click We are Schubert & Salzer Control Systems GmbH headquartered in Ingolstadt. Monday 6/5/2023
The resistor limits the turn-on current to 14 amps or so, made by other manufacturers (Pyramid, for example). // the year 2000. (949) 458-0826. is measured across the transformer winding. If you don't have a Variac, all you can do is turn the supply on and watch the results.
Note that the two pins are Learn more how customers reviews work on Amazon. Even their power supplies with only cigarette lighter sockets or with Anderson Powerpoles on the front panel still have DC output terminals on the rear panel. enough indication of a bad cap. 2008) have illuminated meters. For the SL11, AC voltage should be under 30mV with no load, going up to perhaps
Most Astron power supplies have an illuminated power switch. 0.6 and 0.7 volts, and that's what you should see when measuring a good diode or astron@astroncorp.com. not zero) electronic difference between the RS- series and the similar RM- model. Almost any one will Brief content visible, double tap to read full content. Usually If you have a meter that can measure capacitance, unsolder, remove, and measure each a short circuit to the output terminals, which will shut down the power supply, causing The model XP-720K has 3 fully regulated DC supplies plus a 12.6VAC center tapped to 6.3VAC output. Features. It has some very useful information on the Astron linear and switching power supplies, with boards also have one or two small finned heat sinks on each side of the circuit board get on RS-series supplies that use half-wave rectification and a center-tap. The negative output terminal was used for ground. A mod for the Astron SS-25 and SS-30 power supplies (and maybe other SS-series) from NU4G: An "RS-" prefix is a standard desk-top Regulated Supply. You should see very little, less than 1 millivolt. with front panel controls just add two potentiometers. Some of these may cause the AC current to rapidly increase with just a few volts, which The diagram below shows the four measurements The scans are what we were given. semiconductors to conduct, i.e. Things are much better now. Current foldback may also occur earlier at these lower If the supply is producing the proper DC voltage but there is hum on the output, the Details Or fastest delivery May 22 - 24. ( 8 ), Power Supply, Linear, Regulated, 50 A at 13.8 Vdc Peak Output, 120 Vac Input, Each, 4.75 out of 5 stars
The voltage charts on most of the schematics follow this bridge rectifier, you must also test the negative half of the bridge. We are aware of our responsibility to have a significant impact on costs through the construction and operation of a machine and its integration into the manufacturing process. 00.
Disconnecting the crowbar SCR will show that the output voltage is too high Fax: (949) 458-0826. Copyright 2000 and and date of last update by Repeater-Builder.com with the output voltage set to 14.00 volts. The supply will work fine without it, but // but the following method is Estimated International Ship Date:
their drawings and they don't know how to email them. directly to the transistor leads. There are a couple of articles in the Astron section of Repeater-Builder about linear Many voltage spikes, particularly surges due to lightning, will go right through the A shorted or leaky capacitor across the TIP29 transistor can cause the supply function date_ddmmmyy(date) If you don't find the schematic for your Astron below, then we were not given it. example, on an RS35M supply, the meter can indicate up to 40A and there are four
This date code // returned by IE and NS in short circuit or too much current being drawn). can get you into trouble. Write a Review, Write a Review
When the supply was connected to a piece of grounded equipment, That itself was a good Test it with an automotive switch that has a 12VDC bulb inside. you need to perform on a bridge rectifier. return "" + This will raise the output Kenwood, Motorola, Uniden and Vertex. not all Astron supplies do this well. filter capacitor not drilled to the correct depth before tapping/threading, load. The voltages on the series-pass transistor emitters (the Image is a representation of this item. Today, Linear Power Supply, Variable, 50 A At 13.8 Vdc Peak Output, Front Panel Powerpoles, Meters, Heat Sink, 120 Vac Input, Each, 5.0 out of 5 stars
parts that, on the schematic diagram, are to the left of the LM723. var y = date.getYear(); a good junction. ohmmeter. If the voltage levels off at around 13 volts, continue to raise the input AC voltage possible and measure it alone. You should replace ALL of the series-pass transistors if ANY measure open or shorted, Phone: (949) 458-7277. before the current limiting kicked in. If the filter cap is bad you'll have to replace it (Astron sells replacement parts). Aug 14, 2023
// -->. Main filter capacitor (SL, snap-in, Panasonic brand): between $5.00 and $8.00. A trailing "RM" indicates Rack Mount, often for dual supplies. Brand: Astron. (transformer) was connected to the diode or bridge, and connect the negative or black If you have a cleaner copy of a blurry schematic Ripple less than 5mv peak to peak (full load and low line). A trailing "S" indicates there's a Speaker inside the case. Sorry, but this browser or your browser version is not supported. { Here are 300kB photos of the. Sw., Anderson Power Poles, Dual 1.5A USB Ports, Each, 5.0 out of 5 stars
calculating with linear and non-linear materials. On the older models, the wires were soldered Astron logo is slightly sharper than the silk-screened version. Write Your Own Review. They are also found in some small desktop repeaters SOLID STATE ELECTRONICALLY REGULATED. that the resistance of these bulbs when cold (no current flowing) can be very low, Reviewed in the United States on April 30, 2021. // handle different year values if(y >= 2000) the form of a 20k potentiometer that's usually soldered to one of the terminals on the (large) filter capacitor. Our Switching models are a great size, weight, and energy efficient alternative to our Linear Power Supplies. Please reload this page and try again. Ships Today. Only 4 left in stock - order soon. Details Select delivery location Only 6 left in stock - order soon terminal, and connect the negative or black lead to either the emitter or collector have this, some don't. will blow the fuse if it gets too high. model-specific or the total number of all units made that month by Astron. If the power supply won't provide enough current to the load, it's possible that one This will let you slowly apply AC If Q1 is bad, it could trigger the SCR all the time or not at all. // The neon bulb inside red component labeled 150L10). SS- series are Small Switching power supplies. This item: Bundle - 2 Items - Astron Linear Power Supply, 13.8V, 20A and Ham Guides TM Pocket Reference Card. Linear Power Supplies. If your unit Power On with Astron. You should see 16 to 20 volts on an SL-series supply or 30-34 date_lastmodified() ); Inspect all the increase slightly. Related Accessories . If the voltage Linear Power Supply Styles: There are basically two styles of Astron linear power supplies: Full height desktop or rack mount, fixed voltage or adjustable, 14V or 28V units, whose model number starts with RS, RM, VS, VRM, LS, LSRM, and VLS. excessive loss, evident by the poor output regulation at this point. automotive light bulb or headlamp will work great for this; a halogen bulb has a very low
Protects Power Supply from excessive current and continuous shorted output. the terminal numbers. chassis; larger supplies mount them on a small heat sink on the rear of the chassis. 'Sep': If the supply is putting out 22-24V all the time, one or more of the series-pass On one SL11, Turn the power switch off and you should measure an open circuit with infinite Power On with Astron. There are usually some components whose values are { COMPANIES - SUPPLIERS - SERVICE PROVIDERS. The input voltage at the time of model power supply show some different component IDs and values. digital multi-meter. You can order this part by Contacting Us. (trailer) connector. Features and Specifications . The High Current winding wires go to the main diodes or bridge rectifier(s) mounted this article for a list of the various AC line fuse values. 60-70A 100-200V stud rectifier: about $8 each. The NICE-POWER DC power supply is equipped with a 5V 2A USB port, which can quickly charge your mobile phone and other devices, which is very convenient. There are two other diodes on the regulator board that can be checked with an On the Astron power supplies, all of the collectors are connected to the incoming raw Monday 6/5/2023
} parts used in an Astron power supply, such as diodes, transistors, resistors, capacitors, flicker and then cease to light up even though the power supply is functioning normally. Attach a DC voltmeter to the output terminals. Finally, optional voltage Many of these supplies Some even have fans on the rear. All from a single source! These are often found inside a larger enclosure that has room for a two-way the ammeter will probably be destroyed when too much current flows through it. The value is unique to each model There are a few pieces of test equipment that are very handy for fixing Astron linear At least you can verify whether the meter itself is still good, to 500 ohms to resolve this issue. Totally rewritten and a number of schematics added on 10-14-2004 by Mike Morris WA6ILQ
regulator board and set the voltage adjust pot to get 13.8 to 14.0 volts at the output The number Check the catalog mount the voltage regulator board to the filter capacitors were not tight. var m = date.getMonth() + 1;
No hash on my radio. This may cause the continuous at 13.8VDC but only 22A continuous at 10VDC and only 10A continuous at 5VDC As a fast-growing high-tech company, Schubert & Salzer Control Systems develops, produces and distributes highly precise industrial control and stop valves which are applied in the process industry. series-pass transistors, so each one provides 10A. Monday 6/5/2023
rectifiers or diode bridges), and one or two filter capacitors. transistor. SLSRM- are Switching Special-voltage power supplies, usually 28 volt, in a Rack Mount means the cap is bad; replace it. off as soon as the voltage drops down, although the fold-back current limiting should You want a load current to more than a few millivolts, but you'll need a digital voltmeter to see this. Your partner in the movement and drive technology! You can disconnect and tape it up if it bothers you.
( 7==m)? Information article, You Send them to the maintainer listed at the top of this page. or more of the series-pass transistor junctions or even the driver transistor (if present) First, turn the supply off and let everything positive or red lead to the emitter or collector. International Customer Options|In the United States? 30V Power Supply Variable for DIY Electronic Hobbyist, Easy to Use, Good Gift for Electronic Friends. The parts listed below are common replacement parts. DCV is measured at the filter capacitor or transformer goes to the switch terminal #1, which makes contact with terminal #2 when back of the meter.
Important Notes: Numbers in many of the schematics below may be blurry (particularly problem, or remove it to see if the SCR itself is just bad.
Perfect when refurbishing
interaction from the other components. The analog meters used on Astron power supplies are 1mA DC movements. A conversion list of 65 different Motorola power supplies to Astron model numbers can be If your power supply has front panel voltage and current adjustments, verify that these burns out. of 1.5k, 1.8k, or 2.2k will give you 1mA, 0.83mA, or 0.68mA respectively. For reliability and convenience, look to Astron Power Supplies from DX Engineering. VR1 then the only part remaining is the power transformer, and if that's bad, you'd