On Nov 8, 2020, at 12:57, Chuck Harris <cfharris@erols.com> wrote:

I don't think so. Dennis's emails are stuck in the infinite
retry loop, which seems to mean that Colin's ISP is set to
drop on the floor all emails that it doesn't want to receive.

It considers them spam, and as such, unworthy of acknowledgement.

The sender's ISP retries... and retries... and retries....

This is a common technique, as it wastes the spam sender's
resources and time, and costs Colin's ISP little or nothing.

-Chuck Harris

Dave Daniel wrote:

If that were the case, Dennis’ emails would bounce, which is not happening.

DaveD

On Nov 8, 2020, at 11:06, Chuck Harris <cfharris@erols.com> wrote:

I think Dennis has it bass-ackwards. The problem is not the
receiver, but rather that the receiver's ISP subscribes to a
service that knows the sender, Dennis, to be a spam generator.

This same problem visited me, maybe a dozen years ago....

I got into an email argument with one of the members of this
group, who thought a just punishment for my disagreeing with
him would be to disrupt my life, by turning me in to Spamhaus
as a spammer.

It was a simple act on his part, he just clicked the REPORT SPAM
button on the anti-spam plugin he installed on his email program.

In a matter of days, emails from my main email address would
bounce when I sent them to members of my circle of family and
friends.

I tracked down my problem to a highly authoritarian European
company, Spamhaus, that maintains a list of entities adjudicated
by themselves to be serial spammers.

This Spamhaus list is the basis of dozens of subscription based
spam blocking services used by many ISP's worldwide.

All you need to get on Spamhaus's list is for ONE (1) person to
click a button on their email program, and report you as a
spammer.

To get off the list, you must contact Spamhaus and provide them
with a host of personal information, and to jump through a few
hoops, to prove that you are a real person... As if!

I got off the list by threatening my ISP, and a few of the ISP's
that subscribe to the offending spam blocking services, with
restraint of trade lawsuits.

Whether or not Dennis knows it, he is a lightning rod for a
group of highly technical miscreants that haunt, or have at one
time haunted this group... many of whom are very nasty,
vindictive people.

Groups.io's solution to the Spamhaus problem is to kick anyone
that bounces groups.io emails as spam, off of group.io.

-Chuck Harris

Colin Herbert via groups.io wrote:

I have belatedly thought of another route to examining this oddity. Apart
from Siggi and Carsten contacting me directly, maybe others might like to
give it a try? My email address can be extracted from that which appears on
Tekscopes, but it is:



Colingherbert(at)blueyonder(dot)co(dot) uk



I will reply directly to any messages that get through to me, so as not to
take bandwidth from Tekscopes.

TIA, Colin.

Hi,
If this problem with my email server is irritating anyone else, I apologise profusely. I receive emails from many people with no problem, but this is puzzling me completely. Apart from contact from Tekscopes, I also get plenty of other email, so I cannot understand why Dennis (and others) cannot get through to me.

May I thank those of you who have emailed me at my personal address - Siggi and Carsten got through fine. I have also had messages from Susan at Sphere, so what is going wrong?

My knowledge of email systems is rudimentary at best, so I am at a loss as to what might be the cause. Please bear with me.
TIA, Colin.

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Michael W. Lynch via groups.io
Sent: 07 November 2020 23:24
To: TekScopes@groups.io
Subject: Re: [TekScopes] Dennis Tillman

I think Dennis mentioned that he was working on a project. So he may be deep in thought.

Michael Lynch

From My I-Phone

mlynch003@yahoo.com

479-477-1115

If that were the case, Dennis’ emails would bounce, which is not happening.

DaveD

On Nov 8, 2020, at 11:06, Chuck Harris <cfharris@erols.com> wrote:

I think Dennis has it bass-ackwards. The problem is not the
receiver, but rather that the receiver's ISP subscribes to a
service that knows the sender, Dennis, to be a spam generator.

This same problem visited me, maybe a dozen years ago....

I got into an email argument with one of the members of this
group, who thought a just punishment for my disagreeing with
him would be to disrupt my life, by turning me in to Spamhaus
as a spammer.

It was a simple act on his part, he just clicked the REPORT SPAM
button on the anti-spam plugin he installed on his email program.

In a matter of days, emails from my main email address would
bounce when I sent them to members of my circle of family and
friends.

I tracked down my problem to a highly authoritarian European
company, Spamhaus, that maintains a list of entities adjudicated
by themselves to be serial spammers.

This Spamhaus list is the basis of dozens of subscription based
spam blocking services used by many ISP's worldwide.

All you need to get on Spamhaus's list is for ONE (1) person to
click a button on their email program, and report you as a
spammer.

To get off the list, you must contact Spamhaus and provide them
with a host of personal information, and to jump through a few
hoops, to prove that you are a real person... As if!

I got off the list by threatening my ISP, and a few of the ISP's
that subscribe to the offending spam blocking services, with
restraint of trade lawsuits.

Whether or not Dennis knows it, he is a lightning rod for a
group of highly technical miscreants that haunt, or have at one
time haunted this group... many of whom are very nasty,
vindictive people.

Groups.io's solution to the Spamhaus problem is to kick anyone
that bounces groups.io emails as spam, off of group.io.

-Chuck Harris

Colin Herbert via groups.io wrote:

I have belatedly thought of another route to examining this oddity. Apart
from Siggi and Carsten contacting me directly, maybe others might like to
give it a try? My email address can be extracted from that which appears on
Tekscopes, but it is:



Colingherbert(at)blueyonder(dot)co(dot) uk



I will reply directly to any messages that get through to me, so as not to
take bandwidth from Tekscopes.

TIA, Colin.

On Nov 8, 2020, at 11:06, Chuck Harris <cfharris@erols.com> wrote:

I think Dennis has it bass-ackwards. The problem is not the
receiver, but rather that the receiver's ISP subscribes to a
service that knows the sender, Dennis, to be a spam generator.

This same problem visited me, maybe a dozen years ago....

I got into an email argument with one of the members of this
group, who thought a just punishment for my disagreeing with
him would be to disrupt my life, by turning me in to Spamhaus
as a spammer.

It was a simple act on his part, he just clicked the REPORT SPAM
button on the anti-spam plugin he installed on his email program.

In a matter of days, emails from my main email address would
bounce when I sent them to members of my circle of family and
friends.

I tracked down my problem to a highly authoritarian European
company, Spamhaus, that maintains a list of entities adjudicated
by themselves to be serial spammers.

This Spamhaus list is the basis of dozens of subscription based
spam blocking services used by many ISP's worldwide.

All you need to get on Spamhaus's list is for ONE (1) person to
click a button on their email program, and report you as a
spammer.

To get off the list, you must contact Spamhaus and provide them
with a host of personal information, and to jump through a few
hoops, to prove that you are a real person... As if!

I got off the list by threatening my ISP, and a few of the ISP's
that subscribe to the offending spam blocking services, with
restraint of trade lawsuits.

Whether or not Dennis knows it, he is a lightning rod for a
group of highly technical miscreants that haunt, or have at one
time haunted this group... many of whom are very nasty,
vindictive people.

Groups.io's solution to the Spamhaus problem is to kick anyone
that bounces groups.io emails as spam, off of group.io.

-Chuck Harris

Colin Herbert via groups.io wrote:

I have belatedly thought of another route to examining this oddity. Apart
from Siggi and Carsten contacting me directly, maybe others might like to
give it a try? My email address can be extracted from that which appears on
Tekscopes, but it is:



Colingherbert(at)blueyonder(dot)co(dot) uk



I will reply directly to any messages that get through to me, so as not to
take bandwidth from Tekscopes.

TIA, Colin.

I have belatedly thought of another route to examining this oddity. Apart
from Siggi and Carsten contacting me directly, maybe others might like to
give it a try? My email address can be extracted from that which appears on
Tekscopes, but it is:



Colingherbert(at)blueyonder(dot)co(dot) uk



I will reply directly to any messages that get through to me, so as not to
take bandwidth from Tekscopes.

TIA, Colin.

On Sat, Nov 7, 2020 at 10:56 PM, Paul Amaranth wrote:

ESR meters are pretty handy and they really don't need to be
all that complicated. I built an analog one with a couple
of op amps and an old meter for around $10.

I really like the idea of building my own, not because I'm cheap, but because I'm just getting back into this hobby after ignoring it for many years, and I need small projects that I can complete in a short period of time. For example, I just got my feet wet a few weeks ago with digital logic, and I have not yet had a chance to build anything with discrete transistors or op amps. I bailed on an EE degree in junior year to do computer science, so I know some very basic stuff -- I can read a schematic, and do basic measurements with a multimeter and oscilloscope -- but there's all kinds of things are still essentially mysterious to me, and I need concrete tasks to get exposure to even fairly basic concepts.

Glenn Little wrote:
If you found one capacitor like this, you will probably find others.
Sounds like it is time to replace the electrolytic capacitors.
They are probably well beyond their design life.

You have a gift for understatement.

I have been wanting to get an ESR meter, but I just haven't gotten around to it. I'm just picking up the electronics hobby again in order to fill my extra hours during the pandemic, and to address, in some useful way, a stash of antique electronics acquired over three generations. It's taking a little while to assemble all the proper tools and instruments.

I do have an EICO model 950B resistance-capacitance bridge that belonged to my grandfather, but a) it's in dire need of restoration itself, and b) it's not a quantitative device (though I can't wait till I get that magic eye working).

I've seen good reviews for a meter that appears to only been available in kit form, possibly only in Australia, but it doesn't seem to be available any longer. Do you have any recommendations for a good ESR meter to get?







!DSPAM:5fa74eb1216121029220781!

Bruce Gentry wrote:
WD-40 is acceptable as a part of a mechanical cleaning process. Flush

it out with a correct solvent after it had done it's work.

Would a "correct solvent" be isopropyl alcohol? I have access to a few
other solvents, but some of them are explicitly forbidden in the Tek
documents (e.g. Acetone) and at least one other (whether or not it's
forbidden by Tek) is known to attack some common plastics.

An esoteric collection of solvents is another unusual feature of my
father's effects which I have taken some pains to keep well sealed and
safely stored.