OK to always substitute low ESR capacitors?

[larry moe 'n curly]

Is it always OK to replace a regular electrolytic capacitor with a low
ESR version in things like the vertical and horizontal sections of a
CRT monitor or TV?

Are there any cases where low ESR electrolytics should never be
substituted?

 

[Bob Parker]

Some small switchmode power supply chips want the filter cap ESR to be
between certain limits, but they're not very common. Generally there
shouldn't be a problem with new caps having lower ESR than the
originals.

 

[budgie]

Is it always OK to replace a regular electrolytic capacitor with a low
ESR version in things like the vertical and horizontal sections of a
CRT monitor or TV?

Are there any cases where low ESR electrolytics should never be
substituted?

I have found instances of a simple switchmode power supply that used standard
electros on the input. Replacing with low ESR type actually increased the
switching frequency spikes on the output.

 

[Arfa Daily]

Bob old boy. Is this you ?? ESR connection would suggest that it is. Give me
a mail to catch up if so.

Geoff

 

[Bob Parker]

Bob old boy. Is this you ?? ESR connection would suggest that it is. Give me
a mail to catch up if so.

Geoff

G'day Geoff!
I think it's me. I only recently realized that my despammed.com
address is completely dead, like Despammed.com itself. Apologies to
anyone who's tried to contact me through it.
You can send me an e-mail by going to
http://members.ozemail.com.au/~bobpar/contact.htm and clicking on the
link there. My e-mail situation's been so destroyed by US spammer
parasites that these days I'm going to extremes to prevent it from
happening yet again.

Regards
Bob

 

[Michael A. Terrell]

G'day Geoff!
I think it's me. I only recently realized that my despammed.com
address is completely dead, like Despammed.com itself. Apologies to
anyone who's tried to contact me through it.
You can send me an e-mail by going to
http://members.ozemail.com.au/~bobpar/contact.htm and clicking on the
link there. My e-mail situation's been so destroyed by US spammer
parasites that these days I'm going to extremes to prevent it from
happening yet again.

Regards
Bob

Bob, have you tried "Mailwasher"? I use it to see what is on the
server and delete or bounce the crap before I log in and download the
e-mail. Its a small program (1.5 MB), and works fairly well. You can
e-mail me for details.

 

[Bob Parker]

Thanks Michael,
I've been running Mailwasher for maybe the last 3+ years. There
have been times when I wouldn't have been able to use some of my
accounts without it. However I don't like its ability to falsely put
real e-mail addresses into the blacklist without warning, causing me
to delete real e-mails and send false SpamCop reports.
By closing down and changing e-mail account names as required,
which is a huge pain in the butt, right now I have only a slight spam
problem, and I'm going to great lengths to keep it that way. Every
spam I get now is reported ASAP through SpamCop.
Apart from that, how are the 'gators these days?

Rgds
Bob

 

[Asimov]

"larry moe 'n curly" bravely wrote to "All" (25 Sep 05 20:51:44)
--- on the heady topic of "OK to always substitute low ESR capacitors?"

lm'c> From: "larry moe 'n curly" <[email protected]>
lm'c> Xref: core-easynews sci.electronics.repair:343135

lm'c> Is it always OK to replace a regular electrolytic capacitor with a low
lm'c> ESR version in things like the vertical and horizontal sections of a
lm'c> CRT monitor or TV?

Yes, without many qualifications.


lm'c> Are there any cases where low ESR electrolytics should never be
lm'c> substituted?

This is now about replacing a low ESR type with a regular cap, right?
There might be but usually not. However, if it is done then a small
value low esr cap should be paralled across it to lower the impedance.
This technique is typically seen in audio amplifier supplies.

A*s*i*m*o*v

.... :<) What does that wire do? =8<Q (oh!)

 

[John Robertson]

Thanks Michael,
I've been running Mailwasher for maybe the last 3+ years. There
have been times when I wouldn't have been able to use some of my
accounts without it. However I don't like its ability to falsely put
real e-mail addresses into the blacklist without warning, causing me
to delete real e-mails and send false SpamCop reports.
By closing down and changing e-mail account names as required,
which is a huge pain in the butt, right now I have only a slight spam
problem, and I'm going to great lengths to keep it that way. Every
spam I get now is reported ASAP through SpamCop.
Apart from that, how are the 'gators these days?

Rgds
Bob

Hi Bob,

Well, I've use two different tacts to try and defeat spam, one that
works quite well is my return email address that I use on newsgroups
(and it IS valid! ;-) - think about what the spammers trim
automatically from posted emails and you will get it. The second is to
use my email address (parts@...) on the web site, BUT with using escape
codes inthe HTML coded part so the spam sniffers don't see it. Look
for 'munging your email address' on google for this trick.

With these two in action I only get about ten spams a day to my web
site email address(parts@...) and none (0) to the newsgroup return
address.

My regular one (JRR@...) I get a couple of hundred a day (sigh) but
that is because it is in WAY too many address books around the world -
but Eudora catches 95% of spam that comes in that way, leaving me
simply to have to review the junk (ten or so a day) that gets to the
inbox. If I opened a new address I'm sure it would not get much at all
using these procedures.

Oh, and I use a MAC running OS X so viruses, spyware, and worms are of
no concern at all.

John :-#)#
--
(Please post followups or tech enquires to the newsgroup) John's
Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call
(604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
www.flippers.com "Old pinballers never die, they
just flip out."

 

[Michael A. Terrell]

Hi Bob,

Well, I've use two different tacts to try and defeat spam, one that
works quite well is my return email address that I use on newsgroups
(and it IS valid! ;-) - think about what the spammers trim
automatically from posted emails and you will get it. The second is to
use my email address (parts@...) on the web site, BUT with using escape
codes inthe HTML coded part so the spam sniffers don't see it. Look
for 'munging your email address' on google for this trick.

With these two in action I only get about ten spams a day to my web
site email address(parts@...) and none (0) to the newsgroup return
address.

My regular one (JRR@...) I get a couple of hundred a day (sigh) but
that is because it is in WAY too many address books around the world -
but Eudora catches 95% of spam that comes in that way, leaving me
simply to have to review the junk (ten or so a day) that gets to the
inbox. If I opened a new address I'm sure it would not get much at all
using these procedures.

Oh, and I use a MAC running OS X so viruses, spyware, and worms are of
no concern at all.

John :

John, take a look at the website linked in the "orginization" line of
the header above. The e-mail javascript pulls the rest of the e-mail
address from the server and combines it with whatever page you are
looking at to give the compleete e-mail address.

Another advantage: I mirrored the site and gave it a different
address by editing one file for the entire website.

 

[Bob Parker]

Hi John
I would like to see every single spammer placed onto some kind of
space vehicle and blasted into the sun. They are the lowest scum of
the earth. They've destroyed e-mail communication and made it
impossible for anyone to make their real e-mail address public. Have
you ever read "Thank The Spammers"? It's at
http://www.linxnet.com/misc/spam/thank_spammers.html and other
websites.
Having expressed that view which I admit is nothing at all to do
with low ESR caps or even electronics, I'd like to suggest that anyone
reading this who has a website takes a look at a neat little online
program which turns text into "character entities". When an e-mail
address on a website's coded with that, the present generation of scum
spammer harvesting bots can't see it. I hope it stays that way.

Cheers
Bob