Design Con 2015
Breaking News
Comments
Newest First | Oldest First | Threaded View
Page 1 / 2   >   >>
MeasurementBlues
User Rank
Blogger
Old test equipment and a future engineer
MeasurementBlues   4/1/2014 9:50:18 AM
NO RATINGS
See Vintage test equipment: Not just for old engineers where I give a firsthand look at a high-school student's collection of vintage test equipment.

MeasurementBlues
User Rank
Blogger
The beauty of old test equipment
MeasurementBlues   4/1/2014 9:47:52 AM
NO RATINGS
Dedicated knobs, no menus, easier to fix. No software. OK you don't get PC connectivity. Life is a tradeoff.

Caleb Kraft
User Rank
Blogger
Re: Senior citizen?
Caleb Kraft   3/30/2014 5:38:19 PM
NO RATINGS
I believe there is a Jr. Version that is not as fancy.

Susan Rambo
User Rank
Blogger
Senior citizen?
Susan Rambo   3/29/2014 2:51:46 PM
NO RATINGS
Caleb, why do they call it "senior"?

Rocket_G
User Rank
Rookie
Re: similar to Heathkit V7-A
Rocket_G   3/28/2014 9:12:39 PM
NO RATINGS
Cool! As a teenager I built a Heathkit IM-11 back in the 1960's, learned a lot about vacuum tube circuits from the build, and got lots of use out of it.  The RCA VoltOhmyst looked familiar to me as well.  Sometime in my undergrad years (B.S.E.E.) I gave it away to an aspiring young EE.

herbissimus
User Rank
Rookie
Re: Waxed paper parts
herbissimus   3/27/2014 7:22:44 PM
NO RATINGS
those of us, for most if not all measurements lived in a world of plus or minus ten percent. mirror not necessary. as to only $15.oo : minimum wage was less than 1 dollar. i couldn't afford a new one. today any autoparts store's got one for $10-$30 that can measure to 1% and has a pretty good repeatability and runs on batteries which vtvm's did not, usually.

Wnderer
User Rank
CEO
Re: Waxed paper parts
Wnderer   3/27/2014 1:53:20 PM
NO RATINGS
More memories from high school.

I recall they used to make precision values of resistors by filing them. They may be using the wax to protect the ground sections after setting the value. I'm not sure about this, though.

cookiejar
User Rank
CEO
similar to Heathkit V7-A
cookiejar   3/27/2014 12:15:37 PM
NO RATINGS
I still have my Heathkit V7-A VTVM which I built in 1957 working.  It's a close cousin to the RCA who had all the standard tube circuits in their tube manuals.  The Heathkit has a db scale and no separate scale for the 1.5V range.  In the 60s I replaced the 1.5V D cell for the ohms function with a power supply kit sold for that function and the zero and ohms pots with the vernier (planetary ball) pots availble from Heath which made setting zero and ohms far less touchy.

Those wax covered paper tubes are hiding the reistor values underneath them.  Who knows what purpose they serve. If you look at the schematic, there are very few caps in the circuit. 

I'm impressed that all my Heathkit tube equipment from the 50s and 60s still functions very well indeed. The only repair I've had to do is replace a resistor in the AG-9A audio generator which had too low a wattage rating causing value shift and 4% harmonic distortion.  After that fix the distortion went down to under 0.02%.

I still mourn the death of Heathkit, like a long lost friend.  They got me into electronics after all.

 

Caleb Kraft
User Rank
Blogger
Re: No Mirror?
Caleb Kraft   3/27/2014 11:05:46 AM
NO RATINGS
Oh I see! Thanks for the link.

Wnderer
User Rank
CEO
Re: No Mirror?
Wnderer   3/27/2014 10:58:18 AM
NO RATINGS
Here's a link.

http://www.radio-electronics.com/info/t_and_m/analogue-multimeter-voa-vom/how-to-use-using-analog-meter.php

 

I was taught in high school to use these meters. You line up the needle with the one in the mirror to get an accurate reading.

Page 1 / 2   >   >>


Flash Poll
Top Comments of the Week
Like Us on Facebook
EE Times on Twitter
EE Times Twitter Feed

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Max Maxfield

Are Today's Designs Bound by the Constraints of Yesteryear?
Max Maxfield
24 comments
As part of my ongoing Pedagogical and Phantasmagorical Inamorata Prognostication Engine project (try saying that 10 times quickly), I'm working with Jason Dueck from Instrument Meter ...

Jolt Judges and Andrew Binstock

Jolt Awards: The Best Books
Jolt Judges and Andrew Binstock
1 Comment
As we do every year, Dr. Dobb's recognizes the best books of the last 12 months via the Jolt Awards -- our cycle of product awards given out every two months in each of six categories. No ...

Engineering Investigations

Air Conditioner Falls From Window, Still Works
Engineering Investigations
2 comments
It's autumn in New England. The leaves are turning to red, orange, and gold, my roses are in their second bloom, and it's time to remove the air conditioner from the window. On September ...

David Blaza

The Other Tesla
David Blaza
5 comments
I find myself going to Kickstarter and Indiegogo on a regular basis these days because they have become real innovation marketplaces. As far as I'm concerned, this is where a lot of cool ...