Greetings in Amplifier Land. I am in need for some I believe DEC or IDEC AP4U Relays there is one per Driver/Amplifier Board I'm open to possible Substitutes if there any available.
Thank every Body!
Thank every Body!
You can use any reasonable relay, if you solder 2-3" long solid core wire to the contacts and put some shrink tube over them. Even if the orientation is different, there is no problem to cross the wires as needed. The relay will "fly" a bit over the PCB, but the solid cores will hold it in place for the next 50 years. It is a good idea to use a double relay parallel for each channel. One contact pair will hit first and take the switching load and burn, the other one will join later, stay clean and keep the resistance low. The often used one contact, one channel relays will always corrode from use and lead to distortion. Often even quite expensive amps have such a cheap loudspeaker relay that worsens sound over time. Maybe even wanted by the manufacturer. I always have a good look at the contacts on any amp I open up for service.
The last stage of this increasing problem are temporarily quitting channels and reduced output with distortions. This sometimes gets better by switching the amp on/off a few times.
The last stage of this increasing problem are temporarily quitting channels and reduced output with distortions. This sometimes gets better by switching the amp on/off a few times.
Usually the footprint is standardized enough so you can choose a sub from Digikey or Mouser. Verify the coil voltage.
Also eBay seems to have a lot of DEC relays.
Are you certain the problem is the relay itself, and not excessive DC output, which should trigger the relay?
Measure the DC before the relay contacts and see.
Also eBay seems to have a lot of DEC relays.
Are you certain the problem is the relay itself, and not excessive DC output, which should trigger the relay?
Measure the DC before the relay contacts and see.
The relay Pads for lack of a better word are worn and no DC issues just want to restore the Amplifier and am hessitent about using the old Relays.
Thank you every Body for your insite and help!
Greatly appreciated!
Thank you every Body for your insite and help!
Greatly appreciated!
Greetings again Guys would anyone know what a good substitute might be Relay for the IDEC AP4U 24 V attached are some pics
If there is a substitute, would I have to modify or cut any leads of the Substitute Relay is Resistance I measured is about 681 Ohms
If there is a substitute, would I have to modify or cut any leads of the Substitute Relay is Resistance I measured is about 681 Ohms
Attachments
Look at Omron for an electrical equivalent, but the footprint will probably be different.
That is a really old relay.
That is a really old relay.
Seen from here, this relay is quite strange, it seems to have 4 channels without common.
It would be necessary to probe it with the ohmmeter to know.
It would be necessary to probe it with the ohmmeter to know.
Thank you everyone for the feedback from our friend in France I wish I knew how to go about measuring it I'm a Novice and do not have the experience
that allot of folks here have.
Very Kind Folks here and Thank you all!
that allot of folks here have.
Very Kind Folks here and Thank you all!
Turns out this relay has four SPDT switches. The board connects all of the four in parallel for one higher current switch.
So all you need is a 10A or more relay with a 24VDC coil, with one or two SPDT switches, a standard configuration.
However you'll have to work out a way to connect it to the board, since the old footprint won't work any more.
Perhaps a local tech could do this for you.
So all you need is a 10A or more relay with a 24VDC coil, with one or two SPDT switches, a standard configuration.
However you'll have to work out a way to connect it to the board, since the old footprint won't work any more.
Perhaps a local tech could do this for you.
ok it's much clearer now, they chose this quadruple relay to pass more current but it's a double circuit, so a two-way relay that passes enough current can be put in place with almost no modification, just a bit of drilling and adaptation.
Maybe you don't want to read this, but if it is a 4-contact relay, I expect it to be perfectly fine.
The trick of multi contact relais at this position is not the 4 times as high allowed current. Inside such a relay the contacts never hit at the same time, some are always slower. You expect the fast ones to sacrifice contact condition to switching loads, while the others keep their as new condition and will conduct with lowest resistance for ages. So some contact will burn and build up corrosion, while the others don't.
Take a very good look at the contacts, you should see different signs of wear. Maybe just reinstall it. If you can open it, maybe use some contact cleaner, but never scrape or file the contacts.
The trick of multi contact relais at this position is not the 4 times as high allowed current. Inside such a relay the contacts never hit at the same time, some are always slower. You expect the fast ones to sacrifice contact condition to switching loads, while the others keep their as new condition and will conduct with lowest resistance for ages. So some contact will burn and build up corrosion, while the others don't.
Take a very good look at the contacts, you should see different signs of wear. Maybe just reinstall it. If you can open it, maybe use some contact cleaner, but never scrape or file the contacts.
I don't know what to think because I've never thought about it that way but it's a hypothesis that holds water.
On the other hand I totally agree that the relays probably don't have a problem, unless something else is damaged on the two PCBs.
In case, here is the relay couplet reference, you can find some... in China.
On the other hand I totally agree that the relays probably don't have a problem, unless something else is damaged on the two PCBs.
In case, here is the relay couplet reference, you can find some... in China.
relay AP4U-24VDC：A6R-110-0
Thank you, Guys, very much for your gifted insight concerning the Relays.
What you are saying makes sense hopefully If I can open them up and look closer, I might be ok if not there was someone from France
Who made the suggestion of using a 10 Amp Relay I believe a Dubble Pole Two Throw Relay and mentioned I might have to drill some holes in the PC Board
To accommodate the new Relay, I just don't know where to drill the holes in the PC Board.
Again, many thanks for all the time and consideration for helping me much appreciated.
What you are saying makes sense hopefully If I can open them up and look closer, I might be ok if not there was someone from France
Who made the suggestion of using a 10 Amp Relay I believe a Dubble Pole Two Throw Relay and mentioned I might have to drill some holes in the PC Board
To accommodate the new Relay, I just don't know where to drill the holes in the PC Board.
Again, many thanks for all the time and consideration for helping me much appreciated.
