Rebonjour

I just setup my 7L5 on CAL signal to compare.

The zero DC peak is rather broad. so I set the dot freq at the CAL 500KHZ and then harmonics for a narrow peak.

Result is indeed a slight difference in the dot freq vs peak center which is slightly different at the harmonics.

The error is perhaps a few kHz but most noticeable at 500khz and full sweep.

Afterwards I used the tracking generator and could verify perfectly the db scales and flatness, also swept the a band pass filter.

I can only marvel at the fine 1980s machine and technology still functioning after 40 years!

Amicalement

Jon

I tweaked the HOR position and SWP CAL pots but could not get a perfect allignment.

Suggest you try this on the CAL 500khz and harmonics, rather than the broad zero DC peak.

I got into an email argument with a member of Tekscopes,
and when he found he couldn't defend his point, he got mad
and turned me in to Spamhaus as a spammer... He even bragged
about what he did... foolishly breaking protocol by not
saying, "Nanny nanny poo poo!" It was real school yard stuff...

I took it as bluster, and shrugged it off. Within days I
started noticing that my customers were not responding to my
emails. A few more days and my 90 year old mother wasn't
respond to my emails...

Since I controlled my mother's email account, I was able
to dig around and look for the problem. I found all of my
emails in her spam folder at her ISP. So, I asked the ISP
why they were blocking me. They said they subscribed to a
spam blocking system run by Spamhaus, and it was identifying
me as a known spammer. They said that I needed to go to
Spamhaus to be restored to normal status... So, I did.

Spamhaus told me to fill out a form, with all sorts of private
info, and fax or snail mail it to them. After verifying the
information on the form, I would likely be removed from the
list.

Yeah, sure, like I'm really going to do that!

Since Spamhaus is in another country, and my mother's ISP is
local, I sicced my lawyer on my mother's ISP for restraint of
trade, and some how everything got straightened out pdq.

I'm sure there are as many reasons for folks being on Spamhaus's
list as there are folks on Spamhaus's list...

I hate Spamhaus way more than I do the spammers.

-Chuck Harris

On Fri, 26 Jan 2024 13:02:12 -0500 "Dale H. Cook"
<bridgewaterma@...> wrote:

On 1/26/2024 12:39 PM, Chuck Harris wrote:

Well, they take notice from *ANYONE* that says you are a
spammer as gospel, and put you on their official list of
known spammers.

IMHO that is not the major problem, which is companies consolidating
hosting providers. Consolidation reduces the number of email servers,
each of which then handles email from many hosting companies, Spam
from one account sent through one of the consolidated email servers
can cause blacklisting of that server IP and affect many customers of
many different consolidated hosts who use that particular email
server.

--
John Griessen -- building lab gear for biologists
Albuquerque NM blog.kitmatic.com
On 1/26/24 10:39, Chuck Harris wrote:

turned my email
address in to Spamhaus some years ago, and I suddenly found
that nobody would accept my emails.

I've had that happen and it's sometimes about the mail server it goes through.
I run my own and find that I have to update to higher levels of setup of details of email
and the latest is called DMARC. gmail.com started requiring it, so the practical thing is to comply and do it.

Several years ago it was adding DKIM and SPF postfix email setup details and some DNS settings also...

It's a big pain the way it randomly strikes.

You might be able to work around this, to an extent.

1. go to your ISP and do not allow them to block spam for you, it will
make life more difficult but you will not have them blocking your emails
2. go into your own email program (assuming that's your delivery
method) and set up rules for where everything goes.

I end up with about 4 or 5 SPAM emails a week, including the ones in Japanese from a Chinese shopping service.? Go figure on that.

Harvey

On 1/26/2024 12:39 PM, Chuck Harris wrote:

Well, they take notice from *ANYONE* that says you are a
spammer as gospel, and put you on their official list of
known spammers.

IMHO that is not the major problem, which is companies consolidating hosting providers. Consolidation reduces the number of email servers, each of which then handles email from many hosting companies, Spam from one account sent through one of the consolidated email servers can cause blacklisting of that server IP and affect many customers of many different consolidated hosts who use that particular email server.
--
Dale H. Cook, Retired AM/FM/TV Chief Engineer, Roanoke/Lynchburg, VA

Hey Chuck!?

Hope all is well??

I could not agree more with your statement.? I receive dozens of TekScopes and TekScopes 2 messages in my "spam" folders every day.? Even though they are not spam.? I move them and mark them as "not spam", the messages continue showing up as "spam".? ??

Sincerely,

Michael Lynch

I hate stuff like this...

Spamhaus is a group of self important busy bodies with
authoritarian complexes.

Why do I say this?

Well, they take notice from *ANYONE* that says you are a
spammer as gospel, and put you on their official list of
known spammers.

They then publish their lists of accused spammers to their
subscribers, and their subscribers disrupt the accused spammers
ability to use email.

The only way off of the list is to give Spamhaus your name,
address, phone number, email addresses, websites, ...

*IF* they then decide that you are legitimate, they may take
you off the list of accused spammers, and your email may be
restored to as it was before.

The problem is their subscribers don't seem to be required
to update their lists of accused spammers immediately, or
at all. The stench of spam will stay with your account until
the last Spamhaus subscriber finally updates you off the list.

Some miscreant on the Tekscopes newsgroup turned my email
address in to Spamhaus some years ago, and I suddenly found
that nobody would accept my emails. They all were dumped into
the spam folders of ISP's everywhere. It took threatening
my ISP with legal action to get them to unlock my address
at Spamhaus.

I hold them in the highest contempt.

-Chuck Harris


On Fri, 26 Jan 2024 02:14:29 -0800 "David C. Partridge"
<david.partridge@...> wrote:

IMPORTANT NOTICE - PLEASE READ

Groups.io has been working at re-verifying members of its Groups in
response to an spam filtering service called?Spamhaus?affecting users.

This process has been ongoing and those members of Groups.io groups
whose e-mail domains are problematic will have already been notified.

This is the bulk of the text of the message I received from Groups.io:

On Saturday January 13th, 2024, an anti-spam service called Spamhaus
labeled one of our email servers as a spam sender. This caused any
email service that uses Spamhaus to stop accepting email from our
server. Because of this, we began a reverification process and sent
out reverification emails to a subset of our users on Sunday January
14th. Spamhaus lifted their block on Monday, January 15th, 2024, but
we need to continue the reverification process.

You can see which, if any, of your users are affected. Go to the
Admin section of your group and look at the Members page. Next to
each user's email, there may be a badge with the letters RI or RS. RI
means the confirmation/reverification is in progress, but has not
been completed. RS means the confirmation/reverification has been
successfully completed.

Here are the next steps in the reverification process:

1. On Sunday, January 28th, group emails to people in the RI state
will be disabled. Messages from moderators and login link emails will
still work.

2. Until February 11th, people will still be able to reverify
themselves and the RI and RS badges will still show up in the Members
page.

3. After that, members still in the RI state will be removed from
groups. The activity log entry will be?Membership - Member Removed,
with the added reason of?reverification failed.

For domains where no reverifications happened, no invites or direct
adds will be permitted going forward. If there is a valid person on
one of those domains, they should contact [email protected] (
[email protected] ) to have the domain ban lifted.

We apologize for the inconvenience this process may cause, but it is
necessary to ensure that we are able to continue delivering group
email reliably. Thank you for using Groups.io.

So, if you received an e-mail from Groups.io explaining what is going
on , and asking you to verify your e-mail address, and you have not
yet done it, please do so.

On Fri, Jan 26, 2024 at 06:05 AM, Dave_G0WBX wrote:

"...but the important part about "HOW" to verify oneself is missing...A very poorly managed notification I think..."

I agree that the message, which appears to be from groups.IO, is confusing. I think it's a case of too much information and the important content is the sentence "Because of this, we began a reverification process and sent out reverification emails to a subset of our users on Sunday January 14th."

The message we all received is an description of the reason for the process. It is not a re-verification request. Therefore, if an individual user did not receive a re-verification email, then no response is necessary.?

开云体育

Hi.

It's all very well forwarding that notification, but the important part about "HOW" to verify oneself is missing.

Another group did add, "just log into you groups.io account, or reply to the message."

Well...? Replying to the message failed, but logging into my account worked, though there is no clue on your account page that verification is (a) needed, or (b) successfully done, or failed, or any such status of one's account.

A very poorly managed notification I think.

Regards.

Dave B.

IMPORTANT NOTICE - PLEASE READ

Groups.io has been working at re-verifying members of its Groups in response to an spam filtering service called?Spamhaus?affecting users.

This process has been ongoing and those members of Groups.io groups whose e-mail domains are problematic will have already been notified.

This is the bulk of the text of the message I received from Groups.io:

On Saturday January 13th, 2024, an anti-spam service called Spamhaus labeled one of our email servers as a spam sender. This caused any email service that uses Spamhaus to stop accepting email from our server. Because of this, we began a reverification process and sent out reverification emails to a subset of our users on Sunday January 14th. Spamhaus lifted their block on Monday, January 15th, 2024, but we need to continue the reverification process.

You can see which, if any, of your users are affected. Go to the Admin section of your group and look at the Members page. Next to each user's email, there may be a badge with the letters RI or RS. RI means the confirmation/reverification is in progress, but has not been completed. RS means the confirmation/reverification has been successfully completed.

Here are the next steps in the reverification process:

1.???? On Sunday, January 28th, group emails to people in the RI state will be disabled. Messages from moderators and login link emails will still work.

2.???? Until February 11th, people will still be able to reverify themselves and the RI and RS badges will still show up in the Members page.

3.???? After that, members still in the RI state will be removed from groups. The activity log entry will be?Membership - Member Removed, with the added reason of?reverification failed.

?

For domains where no reverifications happened, no invites or direct adds will be permitted going forward. If there is a valid person on one of those domains, they should contact?[email protected]?to have the domain ban lifted.

We apologize for the inconvenience this process may cause, but it is necessary to ensure that we are able to continue delivering group email reliably. Thank you for using Groups.io.

So, if you received an e-mail from Groups.io explaining what is going on , and asking you to verify your e-mail address, and you have not yet done it, please do so.

-- 
Sent from a MicroSoft free zone:

IMPORTANT NOTICE - PLEASE READ

Groups.io has been working at re-verifying members of its Groups in response to an spam filtering service called?Spamhaus?affecting users.

This process has been ongoing and those members of Groups.io groups whose e-mail domains are problematic will have already been notified.

This is the bulk of the text of the message I received from Groups.io:

On Saturday January 13th, 2024, an anti-spam service called Spamhaus labeled one of our email servers as a spam sender. This caused any email service that uses Spamhaus to stop accepting email from our server. Because of this, we began a reverification process and sent out reverification emails to a subset of our users on Sunday January 14th. Spamhaus lifted their block on Monday, January 15th, 2024, but we need to continue the reverification process.

You can see which, if any, of your users are affected. Go to the Admin section of your group and look at the Members page. Next to each user's email, there may be a badge with the letters RI or RS. RI means the confirmation/reverification is in progress, but has not been completed. RS means the confirmation/reverification has been successfully completed.

Here are the next steps in the reverification process:

1.???? On Sunday, January 28th, group emails to people in the RI state will be disabled. Messages from moderators and login link emails will still work.

2.???? Until February 11th, people will still be able to reverify themselves and the RI and RS badges will still show up in the Members page.

3.???? After that, members still in the RI state will be removed from groups. The activity log entry will be?Membership - Member Removed, with the added reason of?reverification failed.

?

For domains where no reverifications happened, no invites or direct adds will be permitted going forward. If there is a valid person on one of those domains, they should contact?[email protected]?to have the domain ban lifted.

We apologize for the inconvenience this process may cause, but it is necessary to ensure that we are able to continue delivering group email reliably. Thank you for using Groups.io.

So, if you received an e-mail from Groups.io explaining what is going on , and asking you to verify your e-mail address, and you have not yet done it, please do so.

Hello Herbert,
My fault, the Dot marker can be positioned by the Dot marker control and is not always centered on screen.?

But this makes no difference as you see that the dot and it is not aligned to the DC-peak.?

If I get this correctly, the adjustment is described in the manual in step 3 of calibration and adjustment procedure.?

These pots are under the cover of the board on the right side. You will probably need 2 plug-in extenders for this adjustment (that is the reason, why I didn’t fix my 7L5 units yet). I wouldn’t recommend doing this in place inside a scope.?

Besides: According to the manual, your calibrator is out of spec. I would trust the HP counter too…

Regards,
Gerrit

I did what Gerrit asked me to do and made a photo of this.

The calibrator is totaly out of doubt with a counter result of my HP counter at 500,007kHz.
The problem is the non congruet alignement of the DOT marker with the DC-Marker when the DOT frequency is 000kHz.

If some one could tell me how to alugne that dot Marker to the DC-Marker, it would be the solution.

Hello,
the DOT Marker can be seen a little bit to the right of the centre and 1.2 of 8 grids from the top.
That was the nearest possible to the 500,600kHz .
The curve shows the 500 kHz curve and when it would be shown correct, the curve of the calibrator should be left out of the window 600 Hz and not, where it is shown !

Herbert

Herbert, oops, NOW I see the dot exactly centered.

Have you checked the calibrator frequency, perhaps the xtal or gen is off by the 750 Hz?

Try an external xtal like 500khz or 1 MHz instead of the calibrator.

Jon

use small HOR POS knob at lower right of 7L5 to center the 500 kHz CAL.

no dot seen in the photo but the dot pos at center should corresponding to the 500.000 kHz CAL at the exact center division.

Suggest you re-read the 7L5 manual on setup,calibration and DOT.

Amicalement

Jon

Here the shot with 500,750kHz and 50 Hz span/div. as you may see, the 500 kHz calibrator shows at 500,650kHz more or less.
That means, that the offset is the same for 000kHz and 500,75kHz


Calibrater with offset

Hi,

in



there is shown an image, with the calibrator signal and the DC-Marker which has a deviation between the DOT-Marker and the DC-Marker and the comment says :

"Illuminted dot can be moved with the DOT MKR knob for a precise frequency readout (this newly Plug-in need a readjustement of the dot position, has a small frequency offset)."

So what ? the dot position needs a readjustement.........but where , which potentiometer ??????

It ssems to be clear, that the dot and the saw toth for the horizontal position are two independent things, and that the DOT-Marker has to be? aligned to the DC-Marker when the Dot Frequency is set to 000 kHz, because the DC-Marker is the one and only trueth shown on the screen.

But where is the damned pot for this ?!


Herbert

Hello Herbert,

The dot should be a really small dot in the horizontal center of the screen on the least upper horizontal (or the upper?) line. It is described somewhere in the manual. If brightness is not turned up sufficient high, the dot is invisible. ?

If everything is adjusted correctly, the dot frequency is always centered on the screen horizontally.

So if you set dot frequency to 500.6 kHz with calibrator signal still applied, is the calibrator signal displayed centered on the screen? Or is the offset still present? If the offset is still present, it could also be a problem with the deflection factor or gain of the output stage,?

If not, you might have a look at the PLL. I didn‘t read the manual in detail yesterday, but it said something about a fractional-N type. Therefore the step size can be wrong too, depending on the circuit. But check deflection factor first.

Regards?
Gerrit

beware the knob shaft encoder issues on these. Also some reste oddities.

Some good scope photos would be great for further guidance


Jon

Hello Gerrit,

Thanks for answering? The "image" is aligned to the scope, and the DOT movess with the alignement.
I understand? the manual, that the DOT is the point, where he named dot frequency is set. That means, that with a display of 000 kHz, the
DOT should be in the same horizontal place as the DC Marker ?!
The 600 Hz offset is present a the 000 kHz as well as with the 500 kHz ( Reference ). The calibrator signal counted shows with a trustable counter about 500,006 kHz.
But it is shown with the same 600 Hz offset ( to the right of the DOT.
By this, I thik, that the internal TCXO of 10MHz should be relative fine !?
What is interesting is, that the offset is nNOT a multiple of the fine displacement of 250 Hz. This means, the the PLL as no "step error" !
The offset is the same with and without digital storage.
Up to now, I did not find any clou who is definiing the position of the DOT in? relation to the frquency saw tooth of the horizontal display ?!
The schematics and the design is for me not very starte forward.

Herbert