Replacement Omron relay for a DEC DE2TU. It is for use in a Yamaha MX-1 power amp. It says 24 V DC,7A 250 VAC on the DE2TU. Here is spec sheet of the DE2TU in Japanese.
http://www.j-dec.co.jp/images/pdf/de.pdf?fbclid=IwAR0inCkK_m3DCkdfbUz_oGDpUklkmekXga_g6I31IFQa_xtgFI1hy--m-zw
http://www.j-dec.co.jp/images/pdf/de.pdf?fbclid=IwAR0inCkK_m3DCkdfbUz_oGDpUklkmekXga_g6I31IFQa_xtgFI1hy--m-zw
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Possibly something like an Omron G4W-2214P-US-HP-DC24 . It does say in the data sheet 'Do not use the G4W to switch micro loads less than 100 mA, such as in signal applications' though.
The mountings on most standard relays are the same, the PCB holes that is.
Omron are among the best, but here I pay about 25 pence UK for decent Chinese. O/E/N about 1.50 pounds max for a 3 Amp relay.
Mouser UK is 8+ pounds. Eye popping for me.
Omron are among the best, but here I pay about 25 pence UK for decent Chinese. O/E/N about 1.50 pounds max for a 3 Amp relay.
Mouser UK is 8+ pounds. Eye popping for me.
O/E/N relay replacement. Can you help locate the correct model number from O/E/N which is compatible with this one? I'm a newb to Electronics.
Check these out:
oen.india.com ...O/E/N India
plarelays.com... pla relays, also well known here
I am not familiar with the sites, whether easy to use or not.
oen.india.com ...O/E/N India
plarelays.com... pla relays, also well known here
I am not familiar with the sites, whether easy to use or not.
Hello pinifinina,
I am not sure of the application so that's why I wrote that the G4W may be unsuitable.
I believe that this is due the G4W needing 'wetting current' (some voltage and current to break through any oxide layer that can form on the contacts). Wikipedia has an entry about 'Wetting Current' that explains the term.
Omron split the relay selections into Power or Signal. I think that the signal relays typically have gold contacts that wouldn't survive power switching for very long but don't oxidize. The power relays use a silver alloy that oxidizes but can survive switching high voltages and currents.
I am not sure of the application so that's why I wrote that the G4W may be unsuitable.
I believe that this is due the G4W needing 'wetting current' (some voltage and current to break through any oxide layer that can form on the contacts). Wikipedia has an entry about 'Wetting Current' that explains the term.
Omron split the relay selections into Power or Signal. I think that the signal relays typically have gold contacts that wouldn't survive power switching for very long but don't oxidize. The power relays use a silver alloy that oxidizes but can survive switching high voltages and currents.
Thank @PChi, the use of this relay is for a power amplifier. When the power amplifier first switched on, the relay stays open to let spike power goes through, like a protection mode, after a couple of second the relay will close allow the power amplifier to operate. So I am not sure if this means the relay is a power or signal relay, I am guessing it’s a signal relay? If it is a signal relay, will G4W work? Thanks
It is a power relay if it is in the output or power supply section.
If it is in the input stage, where a low current is seen, 500 mA or so is enough, then it is a signal relay.
If it is in the input stage, where a low current is seen, 500 mA or so is enough, then it is a signal relay.
The best speaker relays should be able to pass the amplifier's minimum and maximum output current.
If the relay contacts cannot pass less than 100mA, you need to turn up the volume or wait for a higher level signal greater than 100mA to pass through the relay contacts to "wake up" the speaker.
IMO, if a relay is not recommended for switching loads less than 100mA, it should not be used for speaker level switching. I think 10mA or less is a better choice.
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Hello pinifinina,
I think NareshBrd and chrisng have answered the question.
The typical application is to connect the amplifier outputs to the speakers after the amplifier outputs have settled so a power relay is likely to be needed.
A friend built a pre-amplifier using miniature power relays to switch the audio signals. After a few years the contacts became intermittent because they weren't signal relays.
I think NareshBrd and chrisng have answered the question.
The typical application is to connect the amplifier outputs to the speakers after the amplifier outputs have settled so a power relay is likely to be needed.
A friend built a pre-amplifier using miniature power relays to switch the audio signals. After a few years the contacts became intermittent because they weren't signal relays.
@chrisng , you are correct. This is exactly my problem. One of my amp channel is experiencing what you have described. When the volume is low, there is no sound, when I start turn up the volume, I can start hearing faint sound coming out from the speaker, but the sound quality is not good, a little crackling, then if I turn the volume up a bit more, then the full sound comes out and clear with no crackling. This means my relay contact is not good correct? I still don’t understand if the relay is power or signal. Sorry @PChi , @NareshBrd , I really don’t know if it is in the input or output section, I don’t understand PCB much… can you give me more guidance?
Check the part numbers with the maker's catalogs, and see the size and contact ratings.
Small relays with low ratings are signal relays, on the input lines as source selectors.
The larger ones with higher ratings will be in the speaker output section and the power supply section, near the mains cord.
Try and find a schematic diagram of the unit, it will be clearer to understand.
And if you have trouble understanding this, give it to a trained technician.
Small relays with low ratings are signal relays, on the input lines as source selectors.
The larger ones with higher ratings will be in the speaker output section and the power supply section, near the mains cord.
Try and find a schematic diagram of the unit, it will be clearer to understand.
And if you have trouble understanding this, give it to a trained technician.