electronic fuse
Do you mean something like a Polyswitch, or something else by electronic fuse?
PM
Do you mean something like a Polyswitch, or something else by electronic fuse?
PM
Lies, damned lies etc.
Fred,
"It is more from carelessness about truth than from intentionally lying that there is so much falsehood in the world."
Samuel Johnson.
Fred,
"It is more from carelessness about truth than from intentionally lying that there is so much falsehood in the world."
Samuel Johnson.
Re: Improbable history and other lies
At the risk of great embarassment 😱 , I will confess one of about 4 key things that got me interested in science (which eventually led me to electronics) was my intent as a kid that I would build a working time machine.
I probably scared my sisters,my mom, and the cats with some of the high voltage pyrotechnics resulting from some of the prototypes.
I'll post a scan of one of my "mad scientist" pics from many years ago one of these days.
Aaaa-Hah Hah hah hah haaaaaaah!
Peabody and Sherman rule!
Thanks for the picks Fred. I love 'em.
Oh, and for my obligatory actual related content:
I used the "speaker fuse in the feedback loop" approach for all of my early amps that used global feedback (when I used to use fuses). A weird thing I remember experiencing during some prototype evaluations years ago was hearing a shrinkage in the left-to-right sound field dimension during loud passages. When I enclosed the fuses in the overall loop, this phenomenon seemed to disappear!
And yes, I wasn't using fuses in the DC rails; I lived danegrously back then. Ah, the brashness of youth ...
mlloyd1
At the risk of great embarassment 😱 , I will confess one of about 4 key things that got me interested in science (which eventually led me to electronics) was my intent as a kid that I would build a working time machine.
I probably scared my sisters,my mom, and the cats with some of the high voltage pyrotechnics resulting from some of the prototypes.
I'll post a scan of one of my "mad scientist" pics from many years ago one of these days.
Aaaa-Hah Hah hah hah haaaaaaah!
Peabody and Sherman rule!
Thanks for the picks Fred. I love 'em.
Oh, and for my obligatory actual related content:
I used the "speaker fuse in the feedback loop" approach for all of my early amps that used global feedback (when I used to use fuses). A weird thing I remember experiencing during some prototype evaluations years ago was hearing a shrinkage in the left-to-right sound field dimension during loud passages. When I enclosed the fuses in the overall loop, this phenomenon seemed to disappear!
And yes, I wasn't using fuses in the DC rails; I lived danegrously back then. Ah, the brashness of youth ...
mlloyd1
POLY...
Hi,
Isn't the Polyswitch mostly for use in Xovers?
From what I remember they looked a little like a largish ceramic disc cap...but I could be wrong.
Cheers,😉
Hi,
Isn't the Polyswitch mostly for use in Xovers?
From what I remember they looked a little like a largish ceramic disc cap...but I could be wrong.
Cheers,😉
Yes, the leaded version of the part looks like a ceramic disc cap. The SMT version looks like a sandwich with a metal strip on top. If you don't like fuses, I doubt if you would like this.
Sometimes used in power supplies to protect parts which take some time to heat up and fail. Trip time is a function of the overload (Operates quickly in a short situation, or can take a second or more to go to hi-res at 2-3x rated load). Resets on power down. Made by Raychem, Bourns, maybe others. Formal name is "resettable overcurrent protector".
Truth is the most valuable thing we have. Let us economize it.
AWL,
"It is not worth while to strain one's self to tell the truth to people who habitually discount everything you tell them, whether it is true or isn't." -Mark Twain
AWL,
"It is not worth while to strain one's self to tell the truth to people who habitually discount everything you tell them, whether it is true or isn't." -Mark Twain
Ok, this might sound stupid, but what if you guys use NFB from the other side of the fuse so the fuse is included in the feedback loop? Just an idea.
If I am not mistaken this is what Hafler did in their earlier amplifiers. There was also a resistor across the fuseholder, so that if the fuse blew you would maintain some feedback for stability.
Regards,
Jam
Regards,
Jam
If I am not mistaken this is what Hafler did in their earlier amplifiers. There was also a resistor across the fuseholder, so that if the fuse blew you wolud maintain some feedback for stability.
Regards,
Jam
Regards,
Jam
Jam,
Take a look at post #35.
You're posting in stereo as well...you didn't blow a fuse, did you? 😉
Take a look at post #35.
You're posting in stereo as well...you didn't blow a fuse, did you? 😉
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