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   >   >>


Top Comments of the Week
Flash Poll
Like Us on Facebook

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

Want a Voltera Desktop PCB Printer?
Max Maxfield
9 comments
I just received an email from my chum Javi in Spain. "Have you heard about Voltera (VolteraInc.com)? It's a Canadian company that is going to offer desktop-size PCB printers for fast ...

Aubrey Kagan

Have You Ever Been Blindsided by Your Own Design?
Aubrey Kagan
37 comments
I recently read GCHQ: The uncensored story of Britain's most sensitive intelligence agency by Richard J. Aldrich. The Government Communication Headquarters (GCHQ), Britain's equivalent of ...

Martin Rowe

No 2014 Punkin Chunkin, What Will You Do?
Martin Rowe
2 comments
American Thanksgiving is next week, and while some people watch (American) football all day, the real competition on TV has become Punkin Chunkin. But there will be no Punkin Chunkin on TV ...

Rich Quinnell

Making the Grade in Industrial Design
Rich Quinnell
15 comments
As every developer knows, there are the paper specifications for a product design, and then there are the real requirements. The paper specs are dry, bland, and rigidly numeric, making ...

Special Video Section
The LT8640 is a 42V, 5A synchronous step-down regulator ...
The LTC2000 high-speed DAC has low noise and excellent ...
How do you protect the load and ensure output continues to ...
General-purpose DACs have applications in instrumentation, ...
Linear Technology demonstrates its latest measurement ...
10:29
Demos from Maxim Integrated at Electronica 2014 show ...
Bosch CEO Stefan Finkbeiner shows off latest combo and ...
STMicroelectronics demoed this simple gesture control ...
Keysight shows you what signals lurk in real-time at 510MHz ...
TE Connectivity's clear-plastic, full-size model car shows ...
Why culture makes Linear Tech a winner.
Recently formed Architects of Modern Power consortium ...
Specially modified Corvette C7 Stingray responds to ex Indy ...
Avago’s ACPL-K30T is the first solid-state driver qualified ...
NXP launches its line of multi-gate, multifunction, ...
Doug Bailey, VP of marketing at Power Integrations, gives a ...
See how to ease software bring-up with DesignWare IP ...
DesignWare IP Prototyping Kits enable fast software ...
This video explores the LT3086, a new member of our LDO+ ...
In today’s modern electronic systems, the need for power ...