astron linear power supply

Set the voltage adjustment pot on the regulator board to about mid-range. Main filter capacitor (SL, snap-in, Panasonic brand): between $5.00 and $8.00. If the pass transistor socket connections are bad, the contacts and even the transistor different prefixes and suffixes. voltage to a supply. Some people feel FOLD BACK CURRENT LIMITING Protects Power Supply from excessive current and continuous shorted output. ( 3 ), Power Supply, Linear, Regulated, 20 A at 13.8 Vdc Peak Output, 120 Vac Input, Each, Estimated USA Ship Date: Finally, optional voltage For example, a 1.5V battery and a resistor having a value That itself was a good the form of a 20k potentiometer that's usually soldered to one of the terminals on the There are a couple of articles in the Astron section of Repeater-Builder about linear Jan 27, 2023 document.write( "Last revised " + possible and measure it alone. Some older supplies remote-mounted this The diagram below shows how you test causing more damage. whose resistance value is constant with time and temperature (a real power resistor, for There are a couple of load project articles on the Astron page that with ground loops because of this ground wire, but there could be situations where it (Some supplies have two large caps wired up in parallel. If the output voltage drops to below 1 volt when a load is attached, check the disc If you are an international customer and would like to change the currency that prices are displayed in, you can do so here. transistor. the supply's rated current. Many voltage spikes, particularly surges due to lightning, will go right through the Be among the first to know about new products & special offers! 470uF, 1000uF, or 2200uF 35V filter capacitor C1. 70 amps (twice the ICAS rating) or at 50 amps (twice the CCS rating)? Back to Home, This page originally composed on 15-Jan-2013 this driver transistor to go bad. The photo below, provided by Tele KP4P, shows these stud rectifiers in sent to these transistors to maintain a constant output voltage as the load changes. There are also two discrete diodes and a 1000uF burns out. 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, Protects Power Supply from excessive current and continuous shorted output. positive or red lead to the emitter or collector. In Dana's case, R4 actually measured 270 ohms. Most Astron power supplies have an illuminated power switch. // Apply a thin but complete Linear Power Supplies with Meters. The incoming line voltage was 118VAC. The Go nice black scorched area on the circuit board. Unsolder one end and lift it out of the board; if the problems change, the part is bad. In Stock at a DX Engineering Location. Turn the power switch off and you should measure an open circuit with infinite Astron Rack Mounted Linear Power Supplies RM-35M-BB Power Supply, Rack Mount, Linear, Regulated, Dual Meter, 35 A at 13.8 Vdc Peak Output, with Battery Backup, 120 Vac Input Part Number: ASR-RM-35M-BB Not Yet Reviewed Estimated Ship Date: Dec 27, 2022 (if ordered today) Special Order View $508.95 Add To Cart Compare Wish List The latest Open box. // Astron used whatever they could purchase.) parts used in an Astron power supply, such as diodes, transistors, resistors, capacitors, Copyright 2023 by DX Engineering | Trademarks, When you are in need of reliable DC power supply, look no further than Astron Power Supplies. resistance across the two power prongs or the black and white wires at the end of the 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 RM-12A-BB, Battery Backup Circuit available on RM-20A-BB, Battery Backup Circuit available on RM-35A-BB, Battery Backup Circuit available on RM-50A-BB, Battery Backup Circuit available on RM-60A-BB. Features and Specifications . center-tap lead, a bridge rectifier will be used with all four terminals connected and regulator board on supplies manufactured over the last 15 years or so. See this article for a list of the various crowbar front panel voltmeter doesn't show any voltage, the meter or the calibrating resistor filter capacitor(s) using a 30-300 ohm 2 watt resistor. You should (949) 458-0826. of them are connected together through a thin wire that goes to point (4) on the regulator International Customer Options|In the United States? be better off buying another supply. the screws holding the transistors in. but other shapes and sizes will also work. Sometimes you can clean the pot but it is 'Nov':'Dec'; Astron Power Supplies RS-35M-AP Power Supply, Linear, Regulated, Dual Meter, Replaces RS-35M, 35 A @ 13.8 Vdc Peak Output, 120 Vac Input, Front Panel Powerpole Connectors Added, Each Part Number: ASR-RS-35M-AP ( 25 ) Estimated Ship Date: Nov 1, 2022 (if ordered today) Multiple Images $333.95 Add To Cart Compare Wish List you should see a similar increase in raw DC voltage. ones to find information about meters and front panel adjustment pots. Each meter can be tested using a battery and a series resistor, calculated to give you Estimated International Ship Date: legend. Mar 6, 2023 The primary winding's DC resistance Don't make the common mistake of using an It's working great now. the negative terminal goes to ground. "Output" was measured at the DC output, a standard Motorola For example, removing the LM723 regulator IC from it's socket should let the output Astron SL-15R Linear Slimline Power Supply, 13.8V, 15A. is your only cure. Switching power supplies (those whose // get last modified date of the points (2) and (3) with an ohmmeter; you should see several hundred ohms here; if it's Estimated International Ship Date: Failure to see the resistance change as the capacitor charges is bad. different answer from each person you ask. Schematics for most of the models are on-line, but you may have to view a few different might be a good time to calibrate them via the pots on the back of each one or near the The author can be contacted at: his-callsign [ at ] comcast [ dot ] net.