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uk.rec.audio (General Audio and Hi-Fi) (uk.rec.audio) Discussion and exchange of hi-fi audio equipment.

WTB: Distortion meter



 
 
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  #1 (permalink)  
Old February 26th 06, 09:50 PM posted to uk.rec.audio
Paul B
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Posts: 29
Default Distortion meter

Thus spake Nick Gorham:
I know this may prompt cry's of "but you like SET's why do you want
one of those", but I don't suppose anyone here in the UK has a unwanted HP
334 or such like that they would consider exchanging for a sensible
sum of money? I have been watching on ebay for some time, but can't
talk myself into paying the shipping from the states where they all
seem to be.
--
Nick



http://www.lindos.co.uk/

or perhaps an HP/Agilent 8903B or one of their dynamic signal analysers from
someone like Livingston Hire. None are cheap options though! HP334's? They
bring back memories.


  #2 (permalink)  
Old February 27th 06, 04:56 AM posted to uk.rec.audio
Iain Churches
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Posts: 617
Default Distortion meter


"Paul B" wrote in message
...
Thus spake Nick Gorham:
I know this may prompt cry's of "but you like SET's why do you want
one of those", but I don't suppose anyone here in the UK has a unwanted
HP
334 or such like that they would consider exchanging for a sensible
sum of money? I have been watching on ebay for some time, but can't
talk myself into paying the shipping from the states where they all
seem to be.
--
Nick



http://www.lindos.co.uk/

or perhaps an HP/Agilent 8903B or one of their dynamic signal analysers
from someone like Livingston Hire. None are cheap options though! HP334's?
They bring back memories.


The 334A is certainly a cheap option. One does not see
them often, but they go for about UKP50.
I had two. I bought a third for spares, and
it turned out to be better than the original pair:-)

The Ferograph is more expensive but a more
comprehensive unit, and therefore a better buy IMO.

Iain




  #3 (permalink)  
Old February 27th 06, 06:10 PM posted to uk.rec.audio
Paul B
external usenet poster
 
Posts: 29
Default Distortion meter

Thus spake Iain Churches:
"Paul B" wrote in message
...
Thus spake Nick Gorham:
I know this may prompt cry's of "but you like SET's why do you want
one of those", but I don't suppose anyone here in the UK has a
unwanted HP
334 or such like that they would consider exchanging for a sensible
sum of money? I have been watching on ebay for some time, but can't
talk myself into paying the shipping from the states where they all
seem to be.
--
Nick



http://www.lindos.co.uk/

or perhaps an HP/Agilent 8903B or one of their dynamic signal
analysers from someone like Livingston Hire. None are cheap options
though! HP334's? They bring back memories.


The 334A is certainly a cheap option. One does not see
them often, but they go for about UKP50.
I had two. I bought a third for spares, and
it turned out to be better than the original pair:-)

The Ferograph is more expensive but a more
comprehensive unit, and therefore a better buy IMO.

Iain


I suppose a further option would be a PC based audio spectrum analyser. I
don't know much about them apart from their existence. I would guess that
the s/w may handle THD & maybe also intemod as well. I don't know if a
programmable source is included, an option or separate. Intermod would
obviously require 2 tones.
http://www.picotech.com/applications/spectrum.html
http://www.taquis.com/home.htm
Some look to use your existing sound card for FFT based analysis using its
ADC. Bit depth will have a big impact on resolution.


  #4 (permalink)  
Old February 28th 06, 08:07 AM posted to uk.rec.audio
Jim Lesurf
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Posts: 3,051
Default Distortion meter

In article , Paul B
wrote:


I suppose a further option would be a PC based audio spectrum analyser.
I don't know much about them apart from their existence. I would guess
that the s/w may handle THD & maybe also intemod as well. I don't know
if a programmable source is included, an option or separate. Intermod
would obviously require 2 tones.
http://www.picotech.com/applications/spectrum.html
http://www.taquis.com/home.htm Some look to use your existing sound card
for FFT based analysis using its ADC.


FWIW At home if I want to analyse something I tend to record onto CD-R,
then load the data onto my computer and analyse it there.

Bit depth will have a big impact on resolution.



Erm... The number of bits per sample may have an effect of the dynamic
range / noise floor. However provided the input is dithered and you have a
fair number of samples you should be able to get well over 100dB range
without too much problem. e.g. being 32k samples with 16bits/sample.

I'd hope that a dynamic range of 100dB would suffice for most concerns
about distortion in domestic audio kit. :-)

The frequency resolution will depend on the number of samples.

Slainte,

Jim

--
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Audio Misc http://www.st-and.demon.co.uk/AudioMisc/index.html
Armstrong Audio http://www.st-and.demon.co.uk/Audio/armstrong.html
Barbirolli Soc. http://www.st-and.demon.co.uk/JBSoc/JBSoc.html
  #5 (permalink)  
Old March 3rd 06, 09:08 PM posted to uk.rec.audio
Ian Bell
external usenet poster
 
Posts: 300
Default WTB: Distortion meter

Nick Gorham wrote:

I know this may prompt cry's of "but you like SET's why do you want one
of those", but I don't suppose anyone here in the UK has a unwanted HP
334 or such like that they would consider exchanging for a sensible sum
of money? I have been watching on ebay for some time, but can't talk
myself into paying the shipping from the states where they all seem to be.


I have a 331A that is surplus to requirements if you are interested.

Ian
  #6 (permalink)  
Old March 4th 06, 08:53 AM posted to uk.rec.audio
Nick Gorham
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Posts: 851
Default WTB: Distortion meter

Ian Bell wrote:

Nick Gorham wrote:


I know this may prompt cry's of "but you like SET's why do you want one
of those", but I don't suppose anyone here in the UK has a unwanted HP
334 or such like that they would consider exchanging for a sensible sum
of money? I have been watching on ebay for some time, but can't talk
myself into paying the shipping from the states where they all seem to be.



I have a 331A that is surplus to requirements if you are interested.

Ian


I am watching a 334 on ebay at the moment, but, yes I am interested,
drop me a mail letting me know what you had mind.

--
Nick
 




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