# Help testing instruments and components

#### MicroMike

Joined Sep 30, 2012
12
Greetings! Being new to these forums I'm crossing my fingers I've posted in the right place.

I'm in the process of trying to liquidate the contents of my fathers prototyping lab via ebay on behalf of my mother who needs money to to cover rising medical and living expenses. My problem is that most of the items are practically worthless unless I can guarantee they're in working order. Years back I ran a small electronics assembly company putting together Terradyne test boards and stiffener frames for a major IC design and fabrication firm, so I know my way around a few basic tools and have been able test meters, power supplies, converters, transformers, etc.

My major problem comes with the higher ticket items. My dads 'lab' once I got there, turned out to be an electronics hoarders dream. Stacked to the ceiling with instruments and components that mystify me because, I'll admit before experts, I was nothing but a solder-by-numbers lab monkey. There are nearly a dozen Tektroniks oscilloscopes, Boonton and Wavetek sweep generators, an ENI OEM-6AM-1B RF power supply and many other high-ticket items that aren't worth the components they're made of unless I can certify they're in good working order.

What I'm looking for is a person or people who can help me find or provide me with basic test procedures for the more complicated devices in the collection. Also, Should my tale of woe be insufficient inducement for said assistance it just so happens that I have tens of thousands of tools, instruments and components to offer in trade.

Thanks in advance for any help.

Mike

#### t06afre

Joined May 11, 2009
5,934
A good test for the scope is to hook the probe up to the calibration output. Then turn the knobs. And see verify that scope picture change correctly. Modern scopes also have a selftest. If this is not passed something is wrong. The waveform generators may be verified by connecting them to scope. And of course this will also test the scope. One thing you should take some care of is the scope probes. They are often made to match the scope. See if you can sort that out. So the scope probes end up on the correct scope. The probes often have small markings stamped on them. Also another note then testing be sure that the scope probes are not set to damp the signal 10 times. A bummer I often made as a beginner

#### Kermit2

Joined Feb 5, 2010
4,162
Strange

I've bought stuff on ebay where the seller has expressly stated in capital letters.

THESE ITEMS ARE SOLD AS IS. There will be no refund or exchange, and all sales are final.

With the full understanding that I might be purchasing a non-working item, I payed for them and was happy with what I got.