"Audio" Oscilloscope features - diyAudio
Go Back   Home > Forums > Design & Build > Equipment & Tools

Equipment & Tools From test equipment to hand tools

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 13th February 2003, 12:10 PM   #1
diyAudio Member
 
Join Date: Aug 2002
Location: Belgium
Default "Audio" Oscilloscope features

If I were to buy a scope for audio circuit testing purposes, what would you recommend ?

pc based vs standalone
what would be the must have features for audio circuit analysis ?

Let's limit the budget please. If the scope would cost as much as a Pass amp, I'd buy the amp instead.

Gert
  Reply With Quote
Old 13th February 2003, 12:20 PM   #2
diyAudio Member
 
Join Date: May 2001
Location: London UK
Default Re: "Audio" Oscilloscope features

[QUOTE]Originally posted by timolien
[B]If I were to buy a scope for audio circuit testing purposes, what would you recommend ?

pc based vs standalone
what would be the must have features for audio circuit analysis ?

Let's limit the budget please. If the scope would cost as much as a Pass amp, I'd buy the amp instead.
-----------------------------------------------

Get an analogue with as wide a badwidth as you can afford; making sure it is in good condition.

Unless you have loads of money, digital/computer based scopes have limited dynamic range 8 to 12 bits and the spectrum analysers are not really good enough. A good sound card (24/96 and not Creative) and Cool EDit will give you good spectral analysis ability.
  Reply With Quote
Old 13th February 2003, 12:36 PM   #3
Banned
 
Join Date: Apr 2002
Location: Germany, Clausthal
Do a forum search "Oscilloscope" or so. There are at least 2 threads about this.

I took an old TEK7000. Also an 465 or so should be fine
  Reply With Quote
Old 13th February 2003, 01:22 PM   #4
EC8010 is offline EC8010  United Kingdom
diyAudio Moderator Emeritus
 
EC8010's Avatar
 
Join Date: Jan 2003
Location: Near London. UK
NOT PC-based. You want 2 channels, and >10MHz of bandwidth. These can be picked up S/H for 100. However, if you pay a little more, (200-250) you could get a Tek 465, which is a proper oscilloscope, and has 100MHz of bandwidth. If you're serious, go for a 100MHz Tek.

I paid 4.25 for my first oscilloscope (the 25p was for the optional mains lead). It was made by Solartron, and was a two-man lift.
__________________
The loudspeaker: The only commercial Hi-Fi item where a disproportionate part of the budget isn't spent on the box. And the one where it would make a difference...
  Reply With Quote
Old 13th February 2003, 01:46 PM   #5
HDTVman is offline HDTVman  United States
diyAudio Member
 
Join Date: Aug 2001
Location: Chicago area
The first o-scope I had was a Tek 555. Another two man lift and two trips too. This one had a seperate power supply chassis which had 24 tubes providing the regulated voltage for the main chassis. The scope tube was a dual beam tube and you could plug in 2 dual trace modules for quad trace operation. The scope was about 75 lbs. and the power supply was over 100 lbs. 13amps. @ 120VAC power requirement. State of the art in 1960.

Later
BZ
__________________
What ever makes the tunes flow
  Reply With Quote
Old 13th February 2003, 02:06 PM   #6
EC8010 is offline EC8010  United Kingdom
diyAudio Moderator Emeritus
 
EC8010's Avatar
 
Join Date: Jan 2003
Location: Near London. UK
I saw a 555 a couple of years ago for 10. We needed a 'scope trolley at work, so I bought the whole ensemble, and charged work a fiver for the trolley, scrapped the scope for the valves and transformers, but kept the manual. Good value for a fiver.
__________________
The loudspeaker: The only commercial Hi-Fi item where a disproportionate part of the budget isn't spent on the box. And the one where it would make a difference...
  Reply With Quote
Old 13th February 2003, 02:44 PM   #7
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
you would spend as much on a decent PC scope as you would on a TEK machine in very good shape. Tektronix does have a PC Based option, btw, Gage Instruments, but tres cher!

I've owned about a dozen scopes -- I really liked my TEK 453 - 50MHz bandwidth, little cousin to the 456 -- it cost me $50 with cart. I have also used the 5XXX series, but these are real boatanchors, serious low noise scopes. I would avoid the TEK 2215 as the CRT mechanism is really fragile -- not a good scope for an undergraduate physics lab as I have said here before. I had one in and it cost me as much for a CRT as the scope, but after that it worked fine.

With regard to bandwidth -- the tradeoff is (as mentioned a few minutes ago on another thread) you start to delve into the realm of probes which approximate the cost of a scope.
  Reply With Quote
Old 13th February 2003, 08:17 PM   #8
diyAudio Member
 
Join Date: Feb 2002
Location: Belgium
A 50MHz dual channel will get you far. As will a delayed timebase.

For audio work, rise time may not be the most important, but high sensitivity is.

Use a HP180D myself, 25kg. Dropped it once, made a dent in the carpet but the scope is fine Also have the manual and a second one for spares.
  Reply With Quote
Old 2nd September 2003, 11:55 PM   #9
diyAudio Member
 
Join Date: Jan 2003
Location: piedmont
Default Eico?

I have a line on an Eico 450...but I've had trouble finding specs for that model. Would it suffice for basic audio work?

Assuming yes, what should I pay for that model?

thanks

/andrew
  Reply With Quote
Old 3rd September 2003, 01:21 AM   #10
diyAudio Member
 
cocolino's Avatar
 
Join Date: May 2002
Location: Bavaria (south of veal sausage equator)
Quote:
If I were to buy a scope for audio circuit testing purposes, what would you recommend ?
Id go for a Tek series 7000. This are IMO the most universal scopes ever made. There are all kinds of plug-ins avaiable, from general purpose, ultrahigh sensivity differential, storage, to highest bandwith.
With the according plug-ins You can convert it to a sampling scope, spectrum analyzer, curve tracer etc. etc.
The nice thing is You can begin with the required basic equipment, a mainframe, a universal purpose Vertical-Amp and Time-Base plug-in and You can buy and upgrade later to whatever You need or want afford.
You`ll find hundrets of series 7000 mainframes and plug-ins on ebay - and they are dirt cheap meanwhile.
__________________
Christoph
STEAL the BEST - INVENT the REST
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
What makes Nichicon "muse"/"for audio" caps different ? percy Parts 2 3rd October 2009 05:53 PM
Oscilloscope, for "debugging" audio signals tryalx Solid State 27 14th July 2008 11:19 AM
12" "guitar" driver in Audio Speakers jwhit67 Multi-Way 4 11th February 2008 02:47 PM
Oscilloscopes and safety measures. (Split from "I want to buy an Oscilloscope") Jennice Parts 36 1st March 2005 06:41 AM


New To Site? Need Help?

All times are GMT. The time now is 04:03 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2