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Re: [TenTec] OT: Scopes

To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Subject: Re: [TenTec] OT: Scopes
From: "Phil Chambley, Sr." <k4dpk@comcast.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Mon, 20 Feb 2012 13:36:47 -0500
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
Decent scopes (Tek, HP, ilk) often have a calibration port that provides 
standard signals to use for calibration on the fly.  Typically, these 
signals might be 0.1 volt, 1.0 volt and 1 kilocycle per second.

It's easy to just connect  the probe to that source and run the vertical and 
horizontal switches through their ranges to see if they all agree.

That'll give you an excellent idea whether the scope is performing to spec. 
or close to it, without having other signal sources, etc.  Be sure and do 
this on all channels.

Also, check the intensity and focus for clarity and brightness.  Look at the 
screen for burned-in lines, and check to see if the controls are smooth and 

Phil C. Sr.

----- Original Message ----- 
From: "Richards" <jruing@ameritech.net>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Sunday, February 19, 2012 11:59 PM
Subject: Re: [TenTec] OT: Scopes

> Please excuse me  if I missed it... but I don't recall anyone explaining
> to the unwashed...
> What can one do to avoid getting a lemon or broken
> or poorly calibrated,  or whatever broken,  oscilloscope
> at the local hamfest ?
> This item is beyond my current expertise, but it may not be
> forever beyond my grasp.    How do I avoid getting stung  (other
> than to buy something new?)    What do I look for if I don't have
> my favorite Elmer on hand ?
> Thanks.
> ----------------------------  K8JHR  ----------------------------------
> On 2/19/2012 2:06 PM, Jim Lowman wrote:
>> Interesting, Steve!  Your memory is much better than mine, since I
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