O-scope question for you old EE's

[John Speth]

Been there recently because I needed to replace my old 5MHz Heathkit O-scope.  I got a reconditioned 100MHz Tek 465B from Tucker Electronics.

I learned that low bandwidth scopes aren't really the usable bandwidth you'd need especially in the digital world.  For example, at 5MHz bandwidth a 5MHz square wave looks like a weak and wimpy sine wave.  There can be lots of high frequency information in a "low" frequency waveform.  I'm very happy with my new Tek scope.  But low bandwidth scopes are useful if you can interpret what you see and aren't picky.

I think those older used scopes by Tek and HP are very valuable IF they were taken care of and repaired properly.  Of course a good calibration is key.

By  the way... Does anyone want to buy a O-scope?

Specs:

Heathkit IO-4105 5 MHz single channel with triggered
sweep.  Assembled by myself, an electrical engineer.
Specs: DC to 5 MHz; 1M ohm input impedance; 10 mv/cm
to 20 V/cm input in 11 ranges; sweep triggered;
trigger source int/ext/line; trigger modes AC/DC/TV,
+/- slope, auto/norm; X/Y inputs.  Recently serviced
and calibrated.  Complete with probe, manual,
schematics, and service info.  $100 OBO.

John Speth
Object Engineering, Inc.
johns at oei.com

-----Original Message-----
From:	List, Christopher [SMTP:Chris.List at sc.siemens.com]
Sent:	Wednesday, June 17, 1998 7:05 AM
To:	synth-diy at mailhost.bpa.nl
Subject:	O-scope question for you old EE's

Quick tool question for you - 

If you were going to spend $450 on a scope, would you get a brand new
20MHz, no frills, LG-Precision or BK-Precision, or would you get an
older used 50 or 100 MHz Tek or HP with delayed sweep or some other
nifty things?

Any thoughts and/or experiences to share?

- CList