Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: worth on November 27, 2011, 01:15:44 pm
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Trying to track down a power supply hum , when I noticed these 2K cement resistors. They appear to have "grown together". Is this a specialized resistor of some sort ? I haven't seen one like this before.
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Is this a specialized resistor of some sort ?
I'm prone to think so
you can also observe it and look to the printed data
if only one is labeled is easy that is a "double" resistor
what about the other side of the moon (resistor) ?
are there 2 connection, 1 connection, or none ?
Kagliostro
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Each resistor says " Mexico 2K 10%" and both have 2 axial leads , like an ordinary cement power resistor.
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They are just two resistors that have grown together. That filler stuff must have gotten soft by either heat or atmospheric conditions.
j.
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Yes.. but is it a problem ?
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Those things are cheap! I'd spend the few cents just to be sure.
Dave
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It was somewhat common in early transistordom to have two small-signal transistors clipped together on one heat sink so that they would remain at the same temperature level.
I have never seen it with resistors.
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Yes.. but is it a problem ?
Do they read correctly on the meter? If they are on the verge of burning up, then the values tend to drift.
It's not likely for these two resistors to have become conductive to one another, as that material is probably rated for 600v+.
j.
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One resistor reads correctly EVENTUALLY. On one, the meter reading starts low , then climbs slowly up to around 2K.. not like the usual resistor. On the other , the reading is way off.
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One resistor reads correctly EVENTUALLY. On one, the meter reading starts low , then climbs slowly up to around 2K.. not like the usual resistor. On the other , the reading is way off.
You need to lift one of their end(s) and measure out of circuit.
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One resistor reads correctly EVENTUALLY. On one, the meter reading starts low , then climbs slowly up to around 2K.. not like the usual resistor. On the other , the reading is way off.
you need to lift one end of each out of circuit to read them accurately - it seems as though one has a cap tied to one end and the other has other stuff in parallel. "it" looks to be 2 parts.
--DL