The importance of proper wattage resistors.

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jnew
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The importance of proper wattage resistors.

Post by jnew » Fri Nov 27, 2015 11:47 am

On some of my builds, I've noticed that I might be under wattaged (if that's a word) in some places. My 8.2K is a 1 watt with the 10K in series at a 2/3 Watt. Also in the pre-amp section, the two 10K 's at the 16uF filtering are also 2/3 watt. I've seen at least one Watt in these places. Thoughts? :what:

Also, the 100k between pins 1&6 on V2. Is a 1/4 watt ok there?

p.s. Builds are 68 superlead spec. 8)
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Re: The importance of proper wattage resistors.

Post by Roe » Sat Nov 28, 2015 4:16 am

use 2+w power resistors and 1/2+w ordinary resistors and 5+w screen resistors. or it will catch fire
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jnew
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Re: The importance of proper wattage resistors.

Post by jnew » Sat Nov 28, 2015 8:21 am

No shit? :shock: WOW! :(
OK so help me out just a little more here. The 8.2K and 10K that are in series need to be at least 2W. I get that. Do both the 10K's in the pre-amp are need to be as well? Or just the one across the board? 8)
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Re: The importance of proper wattage resistors.

Post by Tazin » Sat Nov 28, 2015 9:09 am

If my memory serves me correctly, 1/2w resistors have a working voltage of 300 to 350Vdc, and 1w resistors have a working voltage of 500Vdc. Therefore, the minimum wattage for the 8K2 and all the 10K resistors should be 1w. The 100K resistor that bridges pins # 1 and 6 on V2 should be a 1/2w due to the voltage present at that location.
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jnew
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Re: The importance of proper wattage resistors.

Post by jnew » Sat Nov 28, 2015 9:14 am

Dude, great info. :thumbsup: So the prudent thing for me would be to measure what's going on here in terms of voltages and make more educated decisions. Would help if I understood ohm's law for this huh? :stars:
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Re: The importance of proper wattage resistors.

Post by white noise » Sat Nov 28, 2015 3:09 pm

It may do alot more damage than just catching on Fire.....

Might be the reason that Ed wrote "I'm on Fire"...... :scratch:
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