Successful dpst solid state relay for High-Risk Applications
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Carlo Gavazzi, Inc. RA2A23D25 Relay; SSR; Zero-Switching; 2P-NO; Cur-Rtg 2x25A; Ctrl-V 4.5-32DC; Vol-Rtg 230AC
Zero switching solid state relays offering two isolated outputs, which can be controlled by separate 4.5 to 32 VDC control signals, which are input via fast-on terminals. Up to 1200 Vp non-repetitive peak voltage. Two LEDs indicate the control status of each pole. Normally open, back-to-back SCR outputs are utilized in the output circuitry to reduce leakage current. UL and CUR recognized and CE compliant.
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b1tchy0ne1217 asked I have a problem with some stereo speakers.?
I have one of those big cabinet stereos with the record player and 8-track in it and when i turn on the power or mess with the volume knob, the speakers pop really loud. The audio gets staticy and cuts in and out as well. As suggestions as to how i could fix this?
And got the following answer:
Since it has an 8-track player, the console is almost surely solid state. This helps because any audio device that is vintage and tube based usually needs capacitors replaced and usually has some tubes that are dead or dying. It's a good weekend project if you are handy with a soldering iron, but most people don't want to do that. That being said, the initial pop you hear from the speakers is due to the amplifier turning on. This is due to there being voltage spike from the amp suddenly drawing current. Most receivers and amplifiers have a relay built in that prevents the amplifier from sending out any signal to the speakers within X amount of time from being turned on. Since the console either doesn't have relay or it has gone bad, you might have to do some electronic surgery to prevent the pop. Without getting too indepth, a manual DPST (or more common DPDT switch) hooked up to the positive wire of each speaker will work. It would mean having to turn on the stereo, wait a few seconds, then flipping the DPST switch, but it would be the most simplistic fix for that problem. Most people who are skilled in electronics could easily do it for you and make it so the cabinet doesn't need to be altered. Whatever you do, never alter the cabinet itself, only the electronics inside if you must. The static, popping, and sound cutting in and out is most likely due to dirty potentiometers. Usually the volume and balance pots have dirt and dust accumulated in them from years and years of use which causes dead spots. Go to Radio Shack and pick up some contact cleaner. Take off all the knobs on the stereo, spray the contact cleaner in the pots, and turn each knob back and forth for a good 20-30 seconds to work it in. Wait a few hours and turn on the stereo again. This usually helps get rid of those dirty spots that are making trouble. A more permanent solution is to completely replace the pots on the stereo which is a time consuming job that might alter the sound of the stereo. Some of the pots used by stereo manufacturers degrade over time and no amount of contact cleaner can completely fix them. This means removing the PCB from the stereo, desoldering the old pot, putting in a new pot, and reinstalling the PCB. Financially, it isn't worth it with the majority of stereo consoles unless they are a very rare piece. If the console has some personal value to you then it is definitely worth doing, especially if you plan to keep it for awhile to come.
The dpst solid state relay work exceptionally properly with diverse applications that happen to be certain to power distribution and protection. The relays come with wide adjustment ranges using a scale that may be easy to study either in three or four digits according to the model. These dpst solid state relay aid in increasing the flexibility on the applications, decrease the all round power and upkeep costs. There are actually relays which are used for basic purposes which are available in reliable styles with speedy replacement solutions. And you’ll find models that happen to be applied for industrial applications and heavier duty applications that perform on substantial loads. These merchandise are produced to meet the lifetime industrial handle requirements of the applications.
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