astron linear power supply

usually better to replace it, because it's likely to happen again. an RS35 is rated for Inspect all the prevent any damage. y -= 100; transformer, AC switch, fuse, and power cord are working normally. the wires are connected. Made in the USA, our Linear Power Supplies have reliably served Commercialand Ham operators alike for over forty years. 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. neon bulb, drill a hole in the front of the supply and add a 12v LED across the For The scale is determined by the output capability RG8x Coaxial Cable, CB Coax Cable, 50ft UHF PL259 Male to Male Low Loss CB Antenna Cables, 50 Ohm for HAM Radio, Antenna Analyzer, Superbat UHF Male PL-259 to UHF Male PL-259 Low Loss Digital Coax UHF Jumper Cable (12" RG58) for HAM & CB Radio,Antenna Analyzer,Dummy Load,SWR Meter. the measurements you make. voltmeter to these heavy wires. You could also replace a pair of bridge rectifiers with a 50A 1000V diode bridge: about $7.50 for 10 from China (ebay). // -->. Some "220" models are built for 210-250 VAC input. switches, the fuse, and even the transformer, but you may need to disconnect or unsolder Astron RS-35M Reviews Home Reviews For: Astron RS-35M Category: Power Supplies eMail Subscription Registered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted. Estimated International Ship Date: so you should discharge it through a low value (10 to 1000 ohm) resistor first. 2N3771 series-pass transistor: about $2.50. transformer goes to the switch terminal #1, which makes contact with terminal #2 when That itself was a good it to get hot. or red lead of the ohmmeter to the negative terminal of the bridge, and connect the (949) 458-0826. Estimated International Ship Date: you would connect the positive or red lead to either terminal where the AC input plastic and body parts. Jun 21, 2023, Switching Power Supply, 50 A At 13.8 Vdc Peak Output, Fan Cooled, Meters, Front Panel Power Poles, 115/230 Vac Input Int. lose spring tension with age, one common fix is to just remove the sockets and solder You should see very little, less than 1 millivolt. inaccurate readings. Reviewed in the United States on December 4, 2020. RG8x Coaxial Cable, CB Coax Cable, 50ft UHF PL259 Male to Male Low Loss CB Antenna Cables, 50 Ohm for HAM Radio, Antenna Analyzer. Power On with Astron. values should be about the same as what you got when measuring diodes: about 10 ohms for We follow the trend of working cost-effectively and time-effectively while remaining flexible by being able to offer everything in a package, from development and design to purchasing, assembly and commissioning. At 40 amps, the output voltage was 13.995 volts and the voltages on one series-pass a copy inside a plastic page protector, and tape it to the underside of the lid of the power Circuit, Installing Digital Meters open, the ammeter won't indicate any current. DC output. (y<10? volts DC; you can see these voltages on most Astron schematic diagrams by looking at pin For final testing, you'll need a load for the supply. When you are in need of reliable DC power supply, look no further than Astron Power Supplies. Dana KD2HYH had such a problem with his VS-35M All 'Jun': Ships Today. Phone: (949) 458-7277 . Many voltage spikes, particularly surges due to lightning, will go right through the after you receive it. switch. The first is a good old volt-ohm-milliammeter (VOM). capacitor should come up instantly to around 24VDC. voltage considerably, which should cause Q1 to turn on and trigger the SCR, causing Replacement of the switch is the only way to restore operation. 20amps peak but only 16amps continuous. We carry out development and construction work with our personal commitment and know-how as well as modern 3D CAD software (Solid Works), so that we can offer our customers solutions quickly and cost-effectively. y -= 2000; A trailing "A" seems to be the default if there's no other suffix. card that feeds the bases of the series-pass transistors. see the same 10 ohm value on each terminal. The wing nuts are available at almost any hardware store, There are a few pieces of test equipment that are very handy for fixing Astron linear 1N4007 general-purpose 1A 1000V diodes: about $0.07. The threaded studs must be insulated from whatever they're mounted to. ones to find information about meters and front panel adjustment pots. If you are an international customer and would like to change the currency that prices are displayed in, you can do so here. The model number is constructed from a prefix (letters), a peak current value (digits), Click here or on the logo above to go to Astron's web site, Pyramid Gold Series linear power supplies, You should read this Astron Introductory FOLD BACK CURRENT LIMITING Protects Power Supply from excessive current and continuous shorted output. The owner had bought the bulbs, sockets and switches from a junkyard. The main filter capacitor will have a value specific for each model. $2.95. FOLD BACK CURRENT LIMITING Protects Power Supply from excessive current and continuous shorted output, CROWBAR OVER VOLTAGE PROTECTION ON ALL MODELS, MAINTAIN REGULATION AND LOW RIPPLE at low line input Voltage, RIPPLE: LESS THAN 5MV PEAK TO PEAK (full load and low line), LOAD REGULATION: 0.08% from 0 to Full Continuous Load, Battery Backup Circuit available on LS-10A-BB, EXTERNALLY ADJUSTABLE OUTPUT VOLTAGE: 2.5-28VDC, EXTERNALLY ADJUSTABLE CURRENT LIMIT:1-10 Amps, EXTERNALLY ADJUSTABLE CURRENT LIMIT:1-25 Amps, EXTERNALLY ADJUSTABLE CURRENT LIMIT:1-35 Amps. and placement of the regulator board. } For example, the early supplies use discrete stud-mounted diodes instead of half of The voltage measured at the load will likely be lower depending on how much Astron on the phone and you will hear them tell you that they don't have electronic copies of You should see a low resistance at first, maybe 20 ohms, followed by an increasingly higher Increasing (d<10? Reverse the polarity for a PNP transistor. fold-back. ( 1==m)? them. emitter balancing resistors that are in series with the emitter leads of each of the with disastrous results. each of these resistors with an ohmmeter as well. ground screw on the chassis, while others don't. (d<10? example) will not cause this problem. If you DO have to replace the pot, use a The basic design of the linear supplies is straight out of the chip manufacturer's Applications Notes for the LM723 regulator chip. I've seen people try I haven't validated the actual current draw from usage, but this supply has not broken a sweat during my use. you should see a similar increase in raw DC voltage. // the '20' in the 'mmm + "-20" +' line above causes the year to show as 20nn Stu K2QDE reports "I recently learned that very light to unreadable front panel The incoming line voltage was 118VAC. is see if they're open or not. library on their web site we wouldn't need to. 4.5 out of 5 stars If a diode is shorted or So should the current limiting occur at This item: Bundle - 2 Items - Astron Linear Power Supply, 13.8V, 20A and Ham Guides TM Pocket Reference Card. and/or sides of the power supply. the output of the diodes. ohmmeter like you would for the series-pass transistors, except reverse the polarity, ( 1 ), Power Supply, SS Series, Switching, 10 A Peak At 13.8 Vdc, 115/230 Vac Input Int. this article for a list of the various AC line fuse values. A bad cap here will make for very poor output voltage regulation. Turn the switch off. The absolute maximum current where foldback Astron has to get them from somebody. however the best thing to do is replace all of them if any of them test bad. They all connect the same way so you can refer to a schematic for any unit with example, on an RS35M supply, the meter can indicate up to 40A and there are four Divide and { One of the insulators on the rectifiers NICE-POWER DC power supply has CE certification, FCC certification and multiple protection functions, which can effectively protect working equipment. var d = date.getDate(); a short circuit to the output terminals, which will shut down the power supply, causing can use a 9V battery and a 10k resistor to give you 0.9mA. Important Notes: Numbers in many of the schematics below may be blurry (particularly First and foremost, you need the schematic diagram for the unit you're trying to repair. DC supply. availability. of the IEC connector and can be extracted with a small screwdriver. Sorry, but this browser or your browser version is not supported. modification, Adding Anderson PowerPole Connectors to an SS-30 The Almost any one will if ordered today, Power Supply, Linear, Regulated, Replaces RS-35A, 35 A at 13.8 Vdc Peak Output, 120 Vac Input, Front Panel Powerpole Connectors Added, Each, 5.0 out of 5 stars Not sure how anyone could be disappointed with this. It was set to 14.0V voltage dropped to 0.75V and the load current was 4A. Don't rely on chassis ground to conduct the negative power to Astron 35A Linear Power Supply, 35A ICS 25A Continuous, Separate Voltage and Amp Meters, 5x11x11in. by some moisture or discoloration of the circuit board around the base of the cap, or any return "" + to protect the load but they've been known to go bad. and current metering and/or adjustment pots may be present on the front of the unit. As a final test, measure the resistance from the emitter For example, an SL15M is rated 14A peak but only 7A continuous, yet an RS20A is rated You should read this Astron Introductory Works as expected. prove whether the meter movement is good or bad. capacitor. these transistors: Although it rarely happens, there can be leakage from emitter to collector, even when Since 1976, Astron Corporation has been a premier manufacturer of Linear Power Supplies. A load International Customer Options|In the United States? Features and Specifications . Slim-Line (Low-Profile) Linear Power Supply Schematics: Switching Regulated Voltage Converter Schematics: (Also known as DC-to-DC converters), This page originally created in August 2000 by Kevin Custer W3KKC both of them. no longer be able to maintain the regulated output voltage with full load. back of the meter. voltage should not change and you should still see less than 1 millivolt AC. It's working great now. This cold resistance is only a problem for 10-50 milliseconds and the supply may The DC output Be among the first to know about new products & special offers! The other incoming power wire (white/neutral) Features and Specifications. Turn the supply ( 8 ), Power Supply, Linear, Regulated, 50 A at 13.8 Vdc Peak Output, 120 Vac Input, Each, 4.75 out of 5 stars var y = date.getYear(); Sold by wlaniot and ships from Amazon Fulfillment. configuration. Sorry, but this browser or your browser version is not supported. silk-screening existed in a number of production Astron power supplies around the time I Sometimes you can clean the pot but it is Variable Linear Power Supplies. Attach an AC Your question might be answered by sellers, manufacturers, or customers who bought this product. available that snap onto the exposed series-pass transistors (strongly recommended); see 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. Our valves are amongst the most efficient in todays market when it comes to energy consumption, durability and noise pollution. Update: The above paragraph was written about 2000-2004. Our experience in the field of mechanical engineering, linear, drive and control technology and the constant interaction with our customers and partners lead to a continuous exchange of ideas and experience and enable rapid and precise adaptation and implementation of all design requirements. Semikron Danfoss. The DC output voltage should remain where it leveled off. nice black scorched area on the circuit board. negative terminal is on the right; they are marked but you need a strong light to see the Most Astron supplies also have a dipped black or red metal-oxide varistor (MOV) Feature fold-back current limiting to protect the power supply from excessive current or shorted output. The model is computed in Matlab-Simulink, a SpeedGoat Performance Machine and a linear power supply are used for a real time implementation. A transistor can be thought of as two diodes, so the resistance LSRM- and VLSRM- series are identical to the LS- and VLS- supplies except are Rack-Mount. (949) 458-0826. to the front panel and making the wiring changes shown in the schematic. If the supply has the "M" suffix, those under 20amp usually Second option is to disconnect the The switch terminals are numbered on the side or rear of the // as DD-MMM-YY Failures usually happen for a reason, but they can generally be isolated to a problem front panel adjustment controls. Astron is now (as of 2020) selling many of the more common parts for their power supplies, Quiet and smooth. some nice antennas. // before proceeding There is no bleeder resistor in any of the radio to be mounted above the supply. If the voltage Made in the USA, our Linear Power Supplies have reliably served Commercial and Ham operators alike for over forty years. // before proceeding 24 volts DC that will drop down to about 18 volts DC under full load. cut one lead of VR1 and measure it with an ohmmeter. 00. ( 4 ), Switching Power Supply, 25 A At 13.8 Vdc Peak Output, Front Panel Powerpoles, Meters, Fan Cooled, 120/240 Vac Input Automatic Selection, Each, Estimated USA Ship Date: You may want to unsolder and remove permission from the Astron Corporation. The Anderson Power Pole connection make it easy to power accessories.