Embedded Systems Conference
Breaking News
Comments
Newest First | Oldest First | Threaded View
<<   <   Page 2 / 2
Robert.Reavis
User Rank
Author
re: Warning: Turn down gain before switching input
Robert.Reavis   10/11/2010 7:27:53 PM
NO RATINGS
I also had an ASR-33 and when I tried to give it away the response came back "What's that?" Before the days of politically correct garbage disposal, I just set it out on the curb next to the garbage can and it was taken away to the dump.

K6TVM
User Rank
Author
re: Warning: Turn down gain before switching input
K6TVM   10/11/2010 6:41:05 PM
NO RATINGS
Thos ole shaker suystems packed a real punch if you weren't careful. I remember one test on a rack frame for a microwave system - the test went up in frequency until there was an ear-splitting screech and the frame came apart all over the lab. The operator's comment to the mechanical designer was, "Well, now you know." And if your nostalgia instinct is strong enough, I have an ASR-33 in my garage - they're remarkably difficult to give away! But my daughter learned to write on it, so it had a second life. John Amos

skomen
User Rank
Author
re: Warning: Turn down gain before switching input
skomen   10/8/2010 8:24:50 PM
NO RATINGS
My uncle worked for the company, I remember going to one of those open houses when I was 10-12 years old, unfortunately I missed the one with the incident in this story but remembered playing with the equipment and having what I typed pop up across the room, great stuff at that age (the incident would have been more fun). Thank you for the memory.

old account Frank Eory
User Rank
Author
re: Warning: Turn down gain before switching input
old account Frank Eory   10/7/2010 10:08:02 PM
NO RATINGS
How nice that now we can afford to make automatic anti-click/pop control a common feature in most modern audio systems -- even those that can't destroy a teletype machine!

mathman47
User Rank
Author
re: Warning: Turn down gain before switching input
mathman47   10/7/2010 5:37:34 AM
NO RATINGS
The above comment should be deleted. It is obviously just and advert.

Duane Benson
User Rank
Author
re: Warning: Turn down gain before switching input
Duane Benson   10/6/2010 8:58:03 PM
NO RATINGS
The lesson also holds for more modern devices as well. Take a microcontroller-driven motor control. If you're designing the firmware on the driver board, you can assume that it will always be powered up properly, with enough gradation to prevent giant power spikes. Then when someone drives it and accidentally sends control signals from zero to 100% in one processor machine cycle, it will spike and blow or just lurch off at full power risking mechanical damage. Alternately, you can build in protection schemes that will assume that someone might just "forget to turn the gain down" when powering on.

Rick_Hille
User Rank
Author
re: Warning: Turn down gain before switching input
Rick_Hille   10/6/2010 6:32:11 PM
NO RATINGS
The lesson here should stike a chord with amp designers/builders. The "click" of switching to a different signal source with potentially different DC offset can potentially destroy a speaker (or speakers) on a high power rig. This could be rather expensive when restoring vintage audio gear.

mtripoli
User Rank
Author
re: Warning: Turn down gain before switching input
mtripoli   10/6/2010 5:58:49 PM
NO RATINGS
I remember those teletypes; we had one for our "computer class" in junior high-school (BASIC). It was connected to the "mainframe" in Boston, MA. We had to write our program out on paper (!), verify it by hand, then enter it (type it in) line by line. You had to wait in between lines for an acknowledgement before entering the next line. Once it was entered it was saved to punch tape. The next day you could go pick up the results of the run. And people complain about Windows...

<<   <   Page 2 / 2


Radio
NEXT UPCOMING BROADCAST
In conjunction with unveiling of EE Times’ Silicon 60 list, journalist & Silicon 60 researcher Peter Clarke hosts a conversation on startups in the electronics industry. One of Silicon Valley's great contributions to the world has been the demonstration of how the application of entrepreneurship and venture capital to electronics and semiconductor hardware can create wealth with developments in semiconductors, displays, design automation, MEMS and across the breadth of hardware developments. But in recent years concerns have been raised that traditional venture capital has turned its back on hardware-related startups in favor of software and Internet applications and services. Panelists from incubators join Peter Clarke in debate.
Flash Poll
Top Comments of the Week
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Special Video Section
The LTC®4015 is a complete synchronous buck controller/ ...
10:35
The LT®3042 is a high performance low dropout linear ...
Chwan-Jye Foo (C.J Foo), product marketing manager for ...
The LT®3752/LT3752-1 are current mode PWM controllers ...
LED lighting is an important feature in today’s and future ...
Active balancing of series connected battery stacks exists ...
After a four-year absence, Infineon returns to Mobile World ...
A laptop’s 65-watt adapter can be made 6 times smaller and ...
An industry network should have device and data security at ...
The LTC2975 is a four-channel PMBus Power System Manager ...
In this video, a new high speed CMOS output comparator ...
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 ...