In the past I would get power resistors and many other things from:
https://www.electronicsurplus.com/resistors/power-resistor
Now after 75 years of brick&mortar they only do online sales.
https://www.electronicsurplus.com/resistors/power-resistor
Now after 75 years of brick&mortar they only do online sales.
Thanks, but I'm looking for non-inductive resistors.
There used to be a gent on eBay named 'electronics-salon'. if I recall I got some from him but he seems to have disappeared.
He wouldn't happen to be a forum member, would he?
There used to be a gent on eBay named 'electronics-salon'. if I recall I got some from him but he seems to have disappeared.
He wouldn't happen to be a forum member, would he?
@cvanc
Parts Express online has the required load resistors.
https://www.parts-express.com/8-Ohm-100W-Non-Inductive-Dummy-Load-Resistor-019-020?quantity=1
https://www.parts-express.com/8-Ohm-200W-Non-Inductive-Dummy-Load-Resistor-019-030?quantity=1
Parts Express online has the required load resistors.
https://www.parts-express.com/8-Ohm-100W-Non-Inductive-Dummy-Load-Resistor-019-020?quantity=1
https://www.parts-express.com/8-Ohm-200W-Non-Inductive-Dummy-Load-Resistor-019-030?quantity=1
Hi, You could also use a electric water heater instead. From the power rating You can calculate the resistance.
2000W and 120V is almost on spot. better even 2x 3500W 240V.
Putting that thing in a barrel filled with water or oil, you have a quite stable high power dummy load.
jauu
Calvin
see: https://www.audiosciencereview.com/...-dummy-load-out-of-water-heater-element.2391/
2000W and 120V is almost on spot. better even 2x 3500W 240V.
Putting that thing in a barrel filled with water or oil, you have a quite stable high power dummy load.
jauu
Calvin
see: https://www.audiosciencereview.com/...-dummy-load-out-of-water-heater-element.2391/
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I did some measurements of power resistors. These guys https://www.ebay.com/itm/2753843313...m8kzMwMc9RV5JMFHYCKArtxaeU|tkp:Bk9SR8bB1OLUYQ for $3.00 were as non inductive as the premium Dale NH version. 3' of 12 AWG zip cord has more inductance than either. The $3 resistors do need heat sinking. Actually a bucket of water works quite well. And at $3 ea. replacing them when they corrode is not a big issue. The inductance would be an issue at 1 MHz and above, but you would not be using 8 Ohms at that frequency constructively.
I have a pair of non inductive resistors I have used over the years for testing amps, but if I were to do again ( and I probably will) I will build a load with built in attenuation so I can tie it to a sound card to test for distortion. I believe on Bonsai’s web site (contributing member) he has a nice discussion on measuring amps and has a layout for such.
Bill
Bill
