Dear colleagues,I like to measure my amplifiers. I have a home made load resistor, but would like to get a proper one with nice connections and maybe a cooling fan to allow for testing of higher powered amplifiers.Is there a place where I can buy a ready made audio load resistor that has ready connections for speaker cables? (I am not particularly good at soldering and would prefer an assembled piece.)Many tanks for you answers.
Since no-one has pointed this out, I feel it's worth a comment: a loudspeaker isn't a simple resistive load, it's a lot more complex and harder for an amplifier to drive. Depending what you are trying to measure, the resistor load will not represent reality and the results you get will tell you almost nothing about the amplifier's true performance with a loudspeaker connected.This is not a reason to not go ahead, just a caveat.
Don't bother trying to produce a heatsink to dissipate the heat from the resistor, just immerse it in water. This is a trick that I learned back in my audio repair days.
A 1500W 120V oil-filled radiator has a resistance of 9.6 Ohms. I have no idea what its inductance would be.
Many thanks for your helpful answers. If possible I would like to buy a load resistor in housing with heat sinks and speaker (banana) terminals. What I have now is a resistor of the kind that some of you linked -- a bare bones thing with ring terminals. As someone suggested, I use cables with alligator clips on one end and banana cables on the other to connect the amplifier. The contraption does not instill much confidence, probably the worst is that the contact surfaces are tiny and slippery.
Heathkit made dummy loads for Ham radio operators, that were placed in a paint can and filled with oil. Don't remember what kind of oil.
So Heathkit suggested, but did not supply mineral oil. They also selected a sealed resistor.https://www.orcadxcc.org/content/cantenna_va7jw.pdf