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Re: What he said!!! [message #42332 is a reply to message #42331]

Mon, 01 September 2003 18:30

Bill Martinelli
Messages: 677
Registered: May 2009

Illuminati (1st Degree)

Actually, I'm experiencing more 60hzhumm than high frequency hiss. This old house needs an electrical update and power balance or filter of some sort.

Bill

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Re: See, I told you [message #42333 is a reply to message #42323]

Mon, 01 September 2003 18:35

Bill Martinelli
Messages: 677
Registered: May 2009

Illuminati (1st Degree)

If you leave the cap off your glue bottle you'll get an infection.

We just picked up the lord of the rings dvd the other day. Have not seen it yet. Fargo was bizzare, and good.

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Re: What he said!!! [message #42334 is a reply to message #42331]

Mon, 01 September 2003 23:40

Wayne Parham
Messages: 18789
Registered: January 2001

Illuminati (33rd Degree)

For straight 5dB padding without any top-octave augmentation, I'd suggest 4 ohms in series and 10 ohms in shunt across the tweeter.

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Re: What he said!!! [message #42335 is a reply to message #42332]

Mon, 01 September 2003 23:48

Wayne Parham
Messages: 18789
Registered: January 2001

Illuminati (33rd Degree)

I think line frequency hum (and its full-cycle rectified double) are probably the most oft-cited problem in audio. Ironically, this almost never plagues people running four hundred dollar receivers. Just the guys running expensive separates, who have to deal with ground loops and relatively long preamp signal lines. I think a lot of tube amps probably have relatively primitive power supply circuits too, so that probably introduces some hum as well.

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Active Crossover [message #42339 is a reply to message #42335]

Tue, 02 September 2003 15:05

LuxmanLover
Messages: 164
Registered: May 2009

Master

I'm not sure if this applies to you Bill, but I went to an active XO a while back and experienced hum that wasn't present with the passive XO. My problem turned out to be cable related. On the back of my XO (Urei 525) there is provision to use XLR's or barrier strips on the in puts and outputs. By putting jumpers between the ground on the barrier strip and the neutral on the input side, my hum went away.
Kelly

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Re: What he said!!! [message #42342 is a reply to message #42334]

Tue, 02 September 2003 19:05

Bill Martinelli
Messages: 677
Registered: May 2009

Illuminati (1st Degree)

Hi Wayne,

Thanks! thats exellant. I'll give it a try later this this week
Man this would be so much ,more, fun if we lived closer
Bill

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Re: Active Crossover [message #42343 is a reply to message #42339]

Tue, 02 September 2003 19:12

Bill Martinelli
Messages: 677
Registered: May 2009

Illuminati (1st Degree)

Hi Kelly,

Wayne's right about the expensive stuff. never a problem with a receiver and always , lets just say challanging with seperates!

This time its coming from from the expensive tube amp. This is the only one that is not connected with balanced lines from the crossover.

I still have a couple different ways to try and connect the bal/unbal together. There is still always "gasp" ground lifting.

Your right though, it's in the cabling because this amp doesnt have a hum when its all by itself.

Bill

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Re: What he said!!! [message #42344 is a reply to message #42342]

Tue, 02 September 2003 19:40

Wayne Parham
Messages: 18789
Registered: January 2001

Illuminati (33rd Degree)

Yeah, I'm wishing all of us could get together more often too. There's a meeting this Saturday here in Tulsa, and it would be sooooo cool if you and Baker and Epstein and Duemm could pop on over. I wish we could have all gone to the Stones concert with George too. But it ain't like we're 20 years old anymore - We each have responsibilities and can't make weekend road trips as often as we used too. Sure would be great if we lived closer though!!!

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