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Post by caesparza on Feb 12, 2019 7:36:55 GMT -7
Hi everybody.
Is it possible to use the air brake as a dummy load for testing purposes?
Thanks in advance. CE
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Post by GuitarZ on Feb 12, 2019 9:09:10 GMT -7
No. It doesn't present a full load. You definitely don't want to use it that way.
I may throw it in line and dial in full attenuation with a speaker plugged in to quiet it all down while testing.
Weber used to sell their 'speaker motor' as a part. I bought one and popped it into a box with jacks for silent testing. I don't see it on their website these days as all of their 'speaker motors' are mounted in chassis and provide attenuation also.
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Post by premiumplus (Dave) on Feb 12, 2019 9:37:10 GMT -7
+1000
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Post by GuitarZ on Feb 12, 2019 12:13:53 GMT -7
You could also get a simple resistive load. I almost forgot that I have an 8 ohm 50 watt resistor that I used for testing. I went with the weber motor when I was trying to build a silent set up with some speaker modeling. I assumed an inductive load would let the amp act more naturally. For testing purposes though, a simple resistive load is good. And, they're not expensive. Here's a 100 watt 8 ohm load: www.parts-express.com/8-ohm-100w-non-inductive-dummy-load-resistor--019-020 for $15. I found 50 watt 8 ohm loads for a couple of bucks with a quick search on Amazon. I've used it to set biasing on my Marshall, check voltages, and such.
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Post by DeanG on Feb 15, 2019 23:58:02 GMT -7
Weber Load Dump, resistive load, no speaker motor in this version. Fixed 4ohm or 8ohm resistive loads are facing the amp. When the amp is connected to 16 ohm, the fixed resistive load is 51ohms. The speaker out volume is a controlled bleed from the rheostat, increases and decreases the volume. The Treble switch does work well. www.tedweber.com/load-dumpRecommend your Amp to be in standby mode if adjusting the ohm selection as your Amp's output is switch through the Ohm selector switch.
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