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Old 13th December 2007, 07:51 PM   #1
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Join Date: Oct 2007
Question Hafler DH 500 relay

where may I get a relay and is their a cross reference for it ?
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Old 20th December 2007, 07:33 PM   #2
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Join Date: Dec 2004
Location: Mt Pleasant Sc
The relay is a Hafler part number 334002 or SZ113.
I think the relay can be replaced by a NTE R10 series 2 pole single or double throw relay , DPDT relay. I do not know the relay operating voltage , I think it is 24vdc but not sure.
Try a NTE , R10-11D10-24F This is a , DPDT , Double Pole Double Throw relay with a 24 vdc operating voltage.
Try to measure the voltage on your existing relay when it operates. You can also measure the resistance of the coil of your relay , it should be around 470 ohms for a 24 volts coil. You can adjust the value of R120 , 1500 ohms 2 watts , for the correct relay operating voltage.
Hope this helps
Ed
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