Bottlehead Forum
Bottlehead Kits => BeePre => Topic started by: Rocketman248 on November 12, 2016, 06:02:31 PM
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Just finished up my BeePre, and I'm having a few resistance and voltage issues.
First, on the resistance checks, everything was OK with the exception of B3. I'm getting an OL on that one. Tracing it back, I'm getting OL all the way up to and including Terminal B on the selector switch.
I had one issue with the voltage check, again with the B side. Terminal 17 and Pin B2 are about 75vdc. A lot of my voltages are low since I'm in Japan, and only have 100VAC mains, but the corresponding terminals on the A side are right at 90.
All LEDs light up, and I'm getting a lot of hum when hooked up to a test system.
Hmmm....just realized that all my problems are on the left channel. Those pesky left channel ghosts again.
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A little progress. Fixed the resistance issue. I had the wire going from 8L to the lower level of the volume pot, not the top. However, I still have a loud hum. Going back through the ground buss now. :(
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So, reading through the threads here, it seems there have been people in the past that have gotten hum with low input power. Looks like my next step is to get a power transformer/conditioner.
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Oh, the sweet, sweet sound of success. Got a step-up transformer to go from 100V to 120V, and that was just the trick. Now the BeePre and Kaiju combo are singing beautifully. Once I get around to putting some finish on the bases, I'll post some pictures of the whole setup, but I don't want to turn these off yet. :)
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Nice work Nick! Looking forward to the pics.