a guitar distorsion box is commonly something that amplifies many times theinput signal,then changes it shape by a non linear stage,that could be anop amp with antiparallel of diodes on feedback network,even using an OP27,of course not the state of art in low noise,i 'm not ableto obtain the low noise of some pedals using less noble op amps as ne5532even bigger is the difference with digitally controlled rack effects asroctktron using HUSH super C noise reduction,i guess this is an example ofdynamic noise reduction,i.e. apparent but effective ,maybe an evolution ofnoise gatesi'm not interested in noise gates that switch off completely the signalunder a certain thresholdanyone can help me in finding infos about how to obtain good results ins/n?thank youDiego,Italy

wavefront semiconductors, AL3101, should keep you busy for a day ortwomartin

how reducing noise in guitar preamps?

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Kevin Aylward 19 years ago

I never have my volume pots at any setting other than full up. Its the professional way to play. It keeps the S/N at its best. It shunts the 1M input amplifier resister, keeps the signal at its highest level and it reduces the effect of cable capacitance. I use a volume pedal in the insert point of the amp. Guitar volumes are only for those that don't know how to their equipment to best effect.

If you are using the internal distortion of an amp, guitar volumes are simply useless. One needs to set the amount of distortion and volume independently. You can only do this after the distortion stage.

Oh... build and repair...so you are a repair tech with delusions of grandeur.

Again, I disagree. If the guitar is a modest distance away from the amp, a decent humbucker does not pick up any significant hum. Sure, at very high distortion gains, hum is magnified a lot, but so is the thermal and shot noise.

Kevin Aylward B.Sc. snipped-for-privacy@anasoft.co.uk

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SuperSpice, a very affordable Mixed-Mode Windows Simulator with Schematic Capture, Waveform Display, FFT's and Filter Design.

"There are none more ignorant and useless,than they that seek answers on their knees, with their eyes closed"

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Kevin Aylward 19 years ago

A good point, although I personally always have my guitar volume full up so its only the 1M end to end impedance. I always use a volume pedal in the insert point of my amp...Which brings up another point. Those folks at Marshal just don't seem to have it all together, and that's after 40+ years making amps. Their amps have a bloody parallel effects loop, so you can't break the connection to insert a volume pedal. Indeed, even phase peddles are useless because they rely on precise cancellation of straight and delayed signal, oh.. and don't forget compressors equally useless. I think they looked at a mixer, and just didn't understand what and why it does what it does.

So, it was the back and forth emails to Paul Marshal, where upon I was graciously sent the schematics so I could perform the relevant modifications on my todd.

Kevin Aylward B.Sc. snipped-for-privacy@anasoft.co.uk

formatting link

SuperSpice, a very affordable Mixed-Mode Windows Simulator with Schematic Capture, Waveform Display, FFT's and Filter Design.

"There are none more ignorant and useless,than they that seek answers on their knees, with their eyes closed"

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Phil Allison 19 years ago

"Kevin Aylward F****it TROLL "

** Now the lying, POS is really desperate !!

Pretending HE is the topic.

Kevin Aylward is completely INSANE

Standard ASININE performance for someone who has both bi-polar disorder and ASD.

** Now the lying, POS is really desperate.

Pretending HE is the topic.

Kevin Aylward is totally INSANE .

Standard ASININE performance for someone who has both bi-polar disorder and ASD.

....... Phil

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joseph2k 19 years ago

Do tell, please show us a microphone preamp with 100 dB S/N. I may want to have one.

JosephKK Gegen dummheit kampfen die Gotter Selbst, vergebens. --Schiller

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joseph2k 19 years ago

Get the h*ll of my internet you damned troll. Yes you Phil.

JosephKK Gegen dummheit kampfen die Gotter Selbst, vergebens. --Schiller

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Fred Bloggs 19 years ago

*Your* internet?? Who the hell do you think you are?

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Frank Bemelman 19 years ago

"Fred Bloggs" schreef in bericht news: snipped-for-privacy@nospam.com...

I suppose the first (or last, depending how you look at it) ten meters UTP cable are mine ;)

Thanks, Frank. (remove \'q\' and \'.invalid\' when replying by email)

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Phil Allison 19 years ago

"joseph2k"

Get the h*ll of my internet you damned troll. Yes you Phil.

JosephKK

Gegen dummheit kampfen die Gotter Selbst, vergebens. --Schiller

** How come these criminal scumbags never got nuked like the Japs ??

....... Phil

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Michael A. Terrell 19 years ago

Isn't your name on the top of that list, Phillis?

Service to my country? Been there, Done that, and I\'ve got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida

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how reducing noise in guitar preamps?

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