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Variation on clean module modification procedure....
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<blockquote data-quote="Chad" data-source="post: 4115" data-attributes="member: 142"><p>I bought my Blackface module (silverface front panel) pre-modded and was looking it over last night. I found that there were TWO resistors in position R1. I searched the web trying to decode the different color bands to find what value the resistors are. Here is a decent resource for that. See section 6.1:</p><p></p><p>http://www.teamsaber.com/john/ee/resistor.html</p><p></p><p>Turns out that one is a 470 ohm (most likely the factory resistor) and the other is a 220 ohm. By using this calculator (another great resource....would also be handy for calculating speaker wiring impedances, etc.):</p><p></p><p>http://www.1728.com/resistrs.htm</p><p></p><p>I found that the total resistance with those two resistors in parallel is......150ohms.....the desired value. </p><p></p><p>Just thought that was kinda interesting and was gonna pass the info along. If a person has trouble finding a 150 ohm resistor, but can find a 220 ohm, then this appears to be a workable alternative.</p></blockquote><p></p>
[QUOTE="Chad, post: 4115, member: 142"] I bought my Blackface module (silverface front panel) pre-modded and was looking it over last night. I found that there were TWO resistors in position R1. I searched the web trying to decode the different color bands to find what value the resistors are. Here is a decent resource for that. See section 6.1: http://www.teamsaber.com/john/ee/resistor.html Turns out that one is a 470 ohm (most likely the factory resistor) and the other is a 220 ohm. By using this calculator (another great resource....would also be handy for calculating speaker wiring impedances, etc.): http://www.1728.com/resistrs.htm I found that the total resistance with those two resistors in parallel is......150ohms.....the desired value. Just thought that was kinda interesting and was gonna pass the info along. If a person has trouble finding a 150 ohm resistor, but can find a 220 ohm, then this appears to be a workable alternative. [/QUOTE]
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Modular Amps
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Variation on clean module modification procedure....
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