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In Reply to: RE: Natural Gas Generator: OK for audio? posted by banpuku on November 15, 2010 at 12:50:50
This is terribly dirty power for a good audio system, and the generator's lack of regulation for non-Ohmic loads would make it difficult to fix with static filters.
Follow Ups:
Hi Al,
Lennox makes a 18kw model that is rated at +/- 1.5% voltage regulation and 3% THD. Is this still too high compared to what we get from the power company?
I have nothing against the power company, but feel ill equipped to build my own DIY filters to clean up the power. I installed a 10kVA isolation transformer, but that did not do much.
Thoughts?
Thanks, Pat
If your 10 KVA transformer did not do much, then your AC may already be relatively clean. I don't think the generator is going to give you better AC for your audio system.
I am happy with Alan Maher's Circuit Breaker Filters. These are small plastic boxes filled with piezoelectric dampers, and they reduce RF noise when placed next to incoming AC wires, circuit breakers, branch circuit wires, some outlets (audio system and elsewhere), and above and below some of your audio gear. There is no wiring involved, although a great deal of caution is required when working near live AC wires.
I use such filters in conjunction with my own R-C parallel filters. The CBFs work well on common-mode noise and the parallel filters work well on normal-mode noise. Sorry I don't have a commercial alternative R-C filter to recommend, as I don't have experience with them.
Thanks for the info, Al.
You mentioned that you use your own R-C filters. Can you share your design? Also, are they relatively easy to build?
Thanks in advance for any consideration.
Pat
I had help in their development and am not ready to publish the details.
They are quite complex and take a lot of time and dexterity to assemble. Circumstances prevent me from developing simplified versions.
"Lennox makes a 18kw model that is rated at +/- 1.5% voltage regulation and 3% THD. Is this still too high compared to what we get from the power company?"
That's about what I get straight out of the wall. If you want cleaner power, you can always by a power regenerator from PS audio or one of the other brands.
Jack
I have nothing against the power company, but feel ill equipped to build my own DIY filters to clean up the power. I installed a 10kVA isolation transformer, but that did not do much.
There is a good chance most of the EMI/RFI electrical noise as well as odd harmonics on the mains of the AC power lines/branch circuit wiring in your home is created by electrical appliances and/or electronic devices within your home.......
Even from the power supplies of your audio equipment.
Edits: 11/16/10
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