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Old 12th June 2005, 02:17 AM   #1
wrl is offline wrl  United States
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Default Relays for speaker protection

Relays for speaker protection
Hello,

I posted this in electronics but haven't gotten any replies so I thought I'd try posting it here.

I am building Rod Elliots Speaker protection circuit to use in my leach amp and I am trying to choose a relay.

Below are two choices:

NTE R25-1D16-12
http://www.nteinc.com/relay_web/pdf/R25.pdf

or

Tyco's OZ series
http://relays.tycoelectronics.com/datasheets/OZ-OZF.pdf

Does anyone have any experience with this. Why is the NTE relay 8 dollars while the tyco is only 1? Are there different characteristics that I am not noticing (build quality?)

One final question for a different but related project, Mouser Electronics claims that this relay below is rated at 10A but the data sheet seems to say that its 5A at both 240V and 120V. Is it 10A or 5A at 120V? Can anybody tell?

http://relays.tycoelectronics.com/datasheets/OMI-2P.pdf


Any input on either topic would be greatly appreciated

Thanks in advance

Wes
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Old 12th June 2005, 04:20 PM   #2
moamps is offline moamps  Croatia
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Join Date: Oct 2002
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Hi,
The most important parameter for a speaker protection relay is DC current capability at resistive/inductive load. For Leach amp speaker protection relay I'd suggest this one (one for each channel):

G8P-1A4P-DC24 ( price around $3)
http://www.mouser.com/index.cfm?hand..._pcodeid=65309

Regards,
Milan
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Old 12th June 2005, 07:26 PM   #3
wrl is offline wrl  United States
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Join Date: Jan 2003
Location: USA
Thanks for the advice.

I'll be using the leach amp to drive electrostatic speakers. I wonder, would a capacitive load cause any problems with this relay?


-Wes
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