FDP Forum / Power resistor question/ 10 messages in thread.

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Elmo66

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Midwest USA

Jan 17th, 2017 08:41 AM        

I'm repairing my first transistor Unicord bass amp and have a resistor value question. The value printed on the resistor is 0.27K. I'm assuming this means 270 ohms?<br /> <br /> Also, the schematic lists this power resistor at 3 watts, but this one is 5 watts? PW5 = 5 watts, right?



ECS-3

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USA / Virginia

Jan 17th, 2017 11:55 AM        

Yea that's 0.27K = 270 ohms, 5 watt wire wound resistor.



Elmo66

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Midwest USA

Jan 17th, 2017 03:07 PM        

Excellent! Thank you. <br /> <br /> This amp has been in my parent's basement since it blew in 1984 at a party. When that happened, I moved over to guitar and so this amp has sat since. I finally (somewhat) have enough knowledge to get it back running.



Peegoo

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The spotlight

looks like a prison break
Jan 18th, 2017 12:08 AM        

Good that you're replacing it. <br /> <br /> That "FU" on there means that resistor has a bad attitude and will be unreliable on the job.<br /> <br /> :o)



Elmo66

Contributing Member
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Midwest USA

Jan 18th, 2017 07:08 AM        

That "FU" and his twin brother are both reading wide open on the meter and are probably responsible for taking out the original power transistors which are made of unobtainium. I've since sourced suitable replacements.



willie

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Too Near Atlanta GA

Amp Tech Emeritus
Jan 18th, 2017 10:11 AM        

..or, the power transistors shorted and took out the resistors... :)<br /> <br /> w



Elmo66

Contributing Member
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Midwest USA

Jan 18th, 2017 11:45 AM        

...and they both ganged up to take out one of the driver transistors...



Pinetree

Moderator Emeritus
(with many stars)

NW Pennsylvania

Jan 18th, 2017 02:18 PM        

"The Bad Resistors"<br /> <br /> <br /> <br />



Peegoo

Contributing Member
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The spotlight

looks like a prison break
Jan 18th, 2017 03:02 PM        

WOOT!<br /> <br /> Band Name Alert!



ECS-3

Contributing Member
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USA / Virginia

Jan 21st, 2017 10:50 AM        

"The Bad Resistors"<br /> <br /> You don't want to meet them in a dark alley.



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