How to Construct a CHEAP Resistive Dummy Load Box for Guitar Amp (Hot Plate, Power Soak)
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- čas přidán 11. 03. 2021
- in this video. We'll discuss how to build your own switchable resistive dummy load box for use on your electronics testing bench. This load box is useful in allowing you to run a signal into an amp without fear of damage to the output transformer or tubes while testing, troubleshooting, or using the line out jack to a recording device, DAW, or mixer. This design allows the impedance to switch between 8 and 16 ohms at 200W and 100W respectively. This is not to be confused with reactive loads or attenuators, although we may do a future video on such a device also. Be sure to subscribe for that!
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CORRECTION: At about
That’s what my dad said when me and all my buddies loaded into the back of the truck, “ well there’s a full dummy load!”
I sent you this concept almost a year ago. My suggestion was a little more elaborate allowing for 2, 4, 8, & 16 ohm loads but at least you have the start of something better than what you were using. Need to add a connection for your oscilloscope. Nice upgrade to your test bench!
I'm doing the same thing at the moment , this is perfect timing for more ideas for my project.
Just don't start calling yourself The Dynacologist.
Great tutorial Brad! I dig these style of instructional videos--great info and footage editing.
Awesome, was watching this while wearing my teal/purple Squishy wrist band and seen your black one! They sent me 2 instead of 1, so I gave one to my G/F, and donated another $20. More power to Squishy little girl.
Brilliant. Not only the engineering, but the reclamation of parts you had and a few purchased items.
I made two attenuators that also work as dummy loads with several 20w resistors :D
That chassis could not have lended itself any better to this project! I love when stuff falls together. Nice job!
Thanks Brad for making video's that bring so much happiness.....
Power handling adds up with series resistors too, because one resistor only gets half the voltage, while in parallel circuits the current is split and the voltage is the same, but if you do the maths the power dissipation will be the same per resistor. You can also add a high impedance voltage divider in parallel to get line level out from the speaker.
Excellent tutorial. Thanks Brad. Can't wait to see you back in the amp world. Though I'm sure your other stuff is just as impressive. I understand that a person must evolve, especially a creator.
Hey Brad, great video today. I still have no idea what it’s for, but I really enjoyed watching you build like always. Keep up the great work.
Thanks Brad. Your videos are top of the pops buddy.
Nicely done. I've done the same thing. I like your chassis. My dummy load is in plain view on a huge heatsink. Cheers
Great video. I made one of these for high discharging RC batteries for racing (they sell for $180 USD which is the same thing you built with a fancy brand label on it). RC guys would appreciate this build, I will pass it on to them.
You know I'll be building one. Thanks Brad!
Damn. Destroying a nice vintage Dynaco. As a vintage audio lover, that hurts. I hope that amp was beyond repair.
The ambient music and time lapse electronics work is hmm, very relaxing haha. More importantly, I now know what I need to do to build a dummy load! I'm going to be repairing an old Fender silver face Bassman amp, so this is perfect, thank you!