โMay-27-2010 02:06 AM
โAug-19-2010 09:28 PM
โAug-19-2010 09:24 PM
โAug-19-2010 02:36 PM
โAug-18-2010 05:21 AM
pritch272 wrote:jas67 wrote:
It would be interesting to see the output of these (and the Hondas and Yamahas) on a scope?
If you look at the power inverter market, there huge difference in price and quality of power produced.
Any conventional generator is going to put out a sine wave, but inverters are another store. All cheap inverters are square wave (not to common any more) or modified-sine (most cheap ones). Pure sign inverters usually cost 2-5X the price of modified sign unit.
I would be willing to bet that the are probably some differences in power quality.
I had some modified sign inverters for power backup at my house, but I sold them because they were hard on motors. Fans sounded bad running on them (loud 60hz hum), and the motors in general ran a lot warmer on them. I didn't want to have to replace my well pump (again), or cause the premature death of a fridge or freezer.
If the CPE inverter is modified-sine output, then it might shorten the life of AC compressors used with them.
Just a thought...
I specifically asked about the quality of the sine wave, CPE's reply:
"Our inverter does not have a stepped voltage or โmodifiedโ sine wave. Our inverter produces a pure sine wave with total harmonic distortion levels less than 3%. This is comparable to the Honda and Yamaha units."
โAug-18-2010 04:50 AM
professor95 wrote:byates wrote:
you might want to upgrade that red phone to a black one with a dial-it would go better with that executive desk chair.
You like my phone? What if I told you that was the phone for the "Hot Line" in the Oval office when Nixon was President?
It is a classic and has better audio reproduction than any of my newer (Chinese?) phones.
BTW - I DO have a black rotary. It is just not plugged in.
โAug-18-2010 02:22 AM
professor95 wrote:
If you want, I can even give you a hair cut while you are here waiting for your lamp. Just be sure to bring the size bowl you want me to put over your head.
โAug-17-2010 08:46 PM
professor95 wrote:
What you WILL notice from the inverter engines compared to the engines used on the synchronous generators is the tone is different. The frequency of the exhaust note is not as harsh - even at full load. The mechanical noise evident in an open frame synchronous generator is not there either. Noise or loudness is not just about what a db meter shows, it can vary to the human ear depending on the frequency range. Thus, 64 db from one source can easily present itself louder to the human ear than 64 db from a different source. We experience this every day.
โAug-17-2010 08:17 PM
dro1984 wrote:
Hi folks! I hope you find this useful, but CPE updated their site with the following info: Champion Inverter Gen.
In a nutshell, it appears to be a little louder (6db) at full load vs. Honda. It's abit heavier too by a few pounds.
Also, I've seen them advertised for about $699 (preorder from BackupGenerator.com).
Based off all this, I'm still very happy with my purchase of a Honda EU2000i. I enjoy the lower db. No regrets!
-Dave.
โAug-17-2010 07:57 PM
byates wrote:
you might want to upgrade that red phone to a black one with a dial-it would go better with that executive desk chair.
โAug-17-2010 07:11 PM
โAug-17-2010 06:36 PM
โAug-17-2010 06:34 PM
professor95 wrote:MrWizard wrote:
It looks like brass lamp factory
What lamp height do you need? My metal lathe is small and will only go to 14" - but I can do more than one section and put them together.
If you want, I can even give you a hair cut while you are here waiting for your lamp. Just be sure to bring the size bowl you want me to put over your head.
โAug-17-2010 03:29 PM
MrWizard wrote:
It looks like brass lamp factory
โAug-17-2010 11:11 AM
โAug-17-2010 11:06 AM