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Re: [TenTec] OT: Scopes

To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] OT: Scopes
From: Stuart Rohre <rohre@arlut.utexas.edu>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Sat, 18 Feb 2012 16:56:18 -0600
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
Many repairs can be expedited with a scope and an RF probe for it so the 
scope can basically cover audio.

Better would be at least 20 MHz scope coverage, so it could measure low 
ham bands.

Better still would be 50 MHz, and above that 100 or 150 MHz.
Seldom do you need full all bands frequency coverage by a scope to still 
be useful to repairs.

Scopes are great for audio problems, rough checks of frequencies, 
digital state tracing, (On off of digital circuits), clock checking for 
RF output, and so on.

A good scope working at a ham fest might only be $125.
An audio scope might be only $10.  The older they are, the less they 
should cost you.

Check any one you intend to offer to buy.  Don't take just the seller's 
word for it working.  Very old scopes cannot be repaired even by the 
manufacturer.  You may have to replace, rather than repair if a CRT goes 
bad, a transformer goes, etc.

Given the constraints, a scope can be a good insurance policy for 
repairs.  In theory, it expands your capability such there is nothing 
you can't test.

Stuart Rohre
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