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Humbuster III Vs duet

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Posted on September 11, 2009 at 08:07:11
artcheng@netvigator.com
Audiophile

Posts: 312
Joined: November 14, 2003
 Hi,

I noticed that the transformer from my power amp hums. I wonder if i should buy humbuster or duet? Would duet solve the problem also?

Arthur

RE: Humbuster III Vs duet, posted on September 11, 2009 at 12:20:27
skytag
Audiophile

Posts: 262
Location: Central Florida
Joined: April 6, 2007
 The Duet won't do anything to cure hum. That's why they have the Humbuster. The Humbuster removes DC from the line, which can cause hum, but note that some hum is normal. My amps have a very slight hum, but I checked the line for DC voltage and it was so low the Humbuster wouldn't have really helped. You can try one for 30 days to see if it fixes the problem.

RE: Humbuster III Vs duet, posted on September 12, 2009 at 09:04:22
artcheng@netvigator.com
Audiophile

Posts: 312
Joined: November 14, 2003
 Thanks. Using the method described by Paul and Fluke meter, the DC between L and N is 24mV. But the is also a difference between N and E of 1.6V. So would Humbuster work?
RE: Humbuster III Vs duet, posted on September 13, 2009 at 08:06:49
PaulMC
Manufacturer

Posts: 804
Joined: April 4, 2000
Contributor
  Since: July 1, 2000
 24mv is probably not enough to make a significant hum. The HB would eliminate this 24mv DC but I am unconvinced, in this case, that the hum is due to DC so the HB probably won't help much.

RE: Humbuster III Vs duet, posted on September 15, 2009 at 09:29:49
artcheng@netvigator.com
Audiophile

Posts: 312
Joined: November 14, 2003
 Dear Paul,

I have tried the DIY version with some success and I will probably buy the humbuster. I am in Hong Kong and contacted Radar, but they say that it is not available in Hong Kong and they refuse to give me a date when this will be available. Is that true?
RE: Humbuster III Vs duet, posted on September 15, 2009 at 16:37:42
PaulMC
Manufacturer

Posts: 804
Joined: April 4, 2000
Contributor
  Since: July 1, 2000
 I don't really know. There's no reason they can't get the HB from us and it does work on 230 volt. I'll check with our director of international sales to see if there's perhaps a misunderstanding.

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