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Dale RH type resistors

Started by saturated, January 07, 2026, 02:18:38 PM

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saturated

I have been looking at these for possibly making a dummy load(s)

I'm noticing that they are available in a variety of resistance ratings as well as watts.

I've googled it quite a bit but noticing what seems to be some really extremely skewed items just wondering what some of the applications are for example a 100 watt 0.025 ohm resistor  :loco

Obviously Dale Vishay...Ohmite don't just make these for people testing amps  :lmao:

Also sorry I have to ask I may try it what happens if you connect an amp to for example a 3.9 Kohm resistor?!  :grr  xP

Anyhow I may not buy some of these I dont see many exactly 8 ohm specimens obviously I can work around that.

But it may be something that you guys that have fixed two million amps have used maybe twice idk  :tu:
I ask stupid questions
and make stupid mistakes

criticism, critique, derision, flaming, verbal abuse welcome

Tassieviking

You can get an 8 ohm 100W resistor to test an amp but a better option is to make an attenuator with inductors and resistors that better simulate a speaker load, I think over in the Marshallforum they came up with a really good homemade version that they use so they can run the tube amps at full power and still tap off at a lot lower power output. A Marshall 800 amp sounds fantastic when you crank it.
https://marshallforum.com/threads/simple-attenuators-design-and-testing.98285/

Other uses could be anything from radio transmission, speaker crossovers, industrial applications like DC motor braking, speed regulation of wiper motors in your old car etc.
Cheers
Mick
There are no stupid questions.
There are only stupid mistakes.

saturated

Yes sir thanks  :dbtu:

Thank you for making a note that we need to be dealing with impedance here so maybe I can get a calculator out and try to design something that would result in 8 ohms reactance at test frequency and be about 100? watts  xP
I ask stupid questions
and make stupid mistakes

criticism, critique, derision, flaming, verbal abuse welcome