CurtPalme.com Home Theater Forum

Kiev Savoie · Joined: 25 Oct 2007 Posts: 432

I found this in my home town priced at $40. Is there anything I can do with it?

http://lafayette.craigslist.org/ele/1673470230.html

mp20748 · Posted: Fri Apr 02, 2010 9:14 pm Post subject:

- $5.00

Mark_A_W · Posted: Fri Apr 02, 2010 10:13 pm Post subject:

You could do the mechanical white balance on a NEC with that.

15mhz is enough for that, you are looking at levels, not frequency response.

Kiev Savoie · Joined: 25 Oct 2007 Posts: 432

Ok, so I gather it is not particularly well suited for most CRT related tasks. Thanks!

Mark_A_W · Posted: Fri Apr 02, 2010 11:09 pm Post subject:

What CRT related tasks exactly are you talking about?

The only reason I have ever needed one is to do the white balance.

Unless you want to get into the mod business, I'm not aware of any other need for a scope.

Tim in Phoenix · Joined: 21 Oct 2006 Posts: 4409 Location: Phoenix

Guys!

A 15 meg scope tells you a lot more than a voltmeter, and you couldn't buy a good voltmeter new for $40.

.

Mark_A_W · Posted: Fri Apr 02, 2010 11:13 pm Post subject:

Well, yes, but my voltmeter was about $15 over 10 years ago, and measures exactly the same as a Fluke.

You can get a good voltmeter for less than $10.

Tim in Phoenix · Joined: 21 Oct 2006 Posts: 4409 Location: Phoenix

Hello

My point is, a waveform is worth a thousand Flukes for some kinds of troubleshooting.

.

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

stefuel · Posted: Sat Apr 03, 2010 2:29 am Post subject:

Of course, a scope is only as good as it's last calibration. A $5K scope that is out of calibration isn't any better than the $40.00 scope that is Wink

Mark_A_W · Posted: Sat Apr 03, 2010 3:40 am Post subject:

For our purposes, calibrating it against the $10 multimeter would be fine.

Both of my scopes have an internal calibration test point, which again, is good enough for our purposes.

**Curt Palme** · Posted: Sat Apr 03, 2010 5:51 am Post subject:

For $40, I think you can do better on eBay, mind you, then there's shipping. I'd wait a week, and offer $10. I don't think he'll have any takers...

Mark_A_W · Posted: Sat Apr 03, 2010 9:41 am Post subject:

Yep. Do that.

My scope cost me a six pack. The other one (a Tek) was free, but it has a dodgy selector switch (must PM Tinman one day).

stefuel · Posted: Sat Apr 03, 2010 11:31 am Post subject:

And then you have to learn how to use it and know what you're looking at.
It might be interesting for someone to start a thread explaining the use and setup of a scope "Scope basics" or "Scopes 101" or something like that.
I'd bet that would end up a large sticky thread Wink

**AnalogRocks** · Posted: Sat Apr 03, 2010 2:04 pm Post subject:

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

there are a bunch of videos on oscilloscope basics on youtube.

But its not hard you just start messing around and eventually your like whooaaaa cooool huh huh. Wink

Athanasios

Kiev Savoie · Joined: 25 Oct 2007 Posts: 432

Well maybe I can do the white balance on my G70's. I think i'll try to low ball him like you said Curt. It just seemed like cheap deal on a piece of equipment that might be fun to learn how to play with. I assume there must be all sorts of things scopes are used for outside of CRT. What about antenna/radio stuff?

Kiev Savoie · Joined: 25 Oct 2007 Posts: 432

Ok here is another one from the same guy i think:

http://lafayette.craigslist.org/sys/1673701024.html

**Curt Palme** · Posted: Sun Apr 04, 2010 3:03 am Post subject:

Hold out for something better. THIS is my main scope (I paid $1200 for it (sob!) (but I got a free FLuke 73 DMM with it!) It's over 20 years old, I use it almost daily:

http://cgi.ebay.com/LEADER-LBO-524-OSCILLOSCOPE-2CH-40MHz-GUARANTEED_W0QQitemZ230449502987QQcmdZViewItemQQptZBI_Oscilloscopes?hash=item35a7dc5b0b\

Or something cheaper and better:

http://cgi.ebay.com/Tektronix-2236-100-MHz-Oscilloscope_W0QQitemZ140394985912QQcmdZViewItemQQptZBI_Oscilloscopes?hash=item20b03179b8

Or really cheap, and better than the CL post:

http://cgi.ebay.com/Hitachi-Oscilloscope-V-423-40MHz_W0QQitemZ320509224638QQcmdZViewItemQQptZBI_Oscilloscopes?hash=item4a9fd6a6be

Just don't go this old:

http://cgi.ebay.com/Vintage-Eico-model-460-Oscilloscope-DC-Wide-Band-Works_W0QQitemZ270554889158QQcmdZViewItemQQptZBI_Oscilloscopes?hash=item3efe53fbc6

Very Happy

Electrogeek · Posted: Tue Apr 06, 2010 12:29 pm Post subject:

Sniffle, are you saying my scope is too old - http://www.heathkit-museum.com/test/hvmom-2.shtml (i actually own the one pictured in working order) to be fair, i use this for most normal stuff http://us.fluke.com/fluke/USEN/Portable-Oscilloscopes/Fluke-190.htm?PID=56045 (199c) - its a bit overkill, but i was given it as dead and breathed some life into it