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Maybe we should have a group for each Tektronix instrument of interest
where users from the main TekScopes group can post their albums. This would
give some organization to the images allowing for a browsing capability
based on the instrument. Right now, you can't find anything.

Best,
John

Or, instead of creating a bureaucratic nightmare, we
could wait for the search capability that groups.io's
owner has promised.

-Chuck Harris

JJ wrote:

Maybe we should have a group for each Tektronix instrument of interest
where users from the main TekScopes group can post their albums. This

would

give some organization to the images allowing for a browsing capability
based on the instrument. Right now, you can't find anything.

Best,
John

Maybe we should have a group for each Tektronix instrument of interest
where users from the main TekScopes group can post their albums. This would
give some organization to the images allowing for a browsing capability
based on the instrument. Right now, you can't find anything.

Best,
John

Not exactly sure how far specific vs generic you are considering, but there are "funwithtubes" and "funwithtransistors" groups on Yahoo that cover a lot of generic content.

I looked around and didn't find another group for other electronics repair
except for very specific ones. thinking about the poster who asked
something about a tube type audio amp I wonder if it might be a good idea
to start a group for such things.

Obviously everyone in this group works on Tek scopes, but I am sure that
most do not exclusively work on Tek scopes. I saw no group for
HP/Agilent/Keysight, whatever their name is now, nor Gould, actually none
of the above.

And, if opinions fly here, should it be restricted (well kinda) to test
equipment ? Should it be open to all electronics such as brownwares
(consumer goods) or perhaps there could be a different group for that ?

The goal here is to do what we do here, but about different electronic
equipment, hopefully without diluting the purpose of this group. I think
this group works well, but I also see a need for others.

What say you ?

...and there is more... operators standing by...
There is a cerated spot on the "variable / fine sweep" shaft where the washer supposed to be,
have no idea how I managed to pull the shaft out and reinsert it with the washer still on it!
Anyway it is now back in correct space and guess what - there must be some kind of spring INSIDE the wafer assembly because now it springs back when released.
Still does not turn the shaft!
I wish I could post pictures here.

Hi,

while waiting for a new display, I took the one I have apart.
These were the steps I took:

Remove the battery,
Remove the front of the scope,
Remove the button rubber,
Carefully fold back the aluminium keyboard plate,
Take out the display, undo the two clamps that holds the flat-cable,
Unplug the HV cable connector,
Remove the display,
Unscrew the two small parkers that holds the plastic cover over the CCFL tube;
Use a little pair of pliers to open the 6 hooks that are bend to keep the
metal front and rear together;
Remove the metal back from the display;
Take the transparent plastic light guide out;
In my case I could see the haircracks in the bottom part of the LCD, causing
the black bar.

Assemble in reverse order, make sure the black foil is tight around the CCFL
and the backlight plastic to make sure all the light enters the display.

Pictures of my display are added here:
/g/TekScopes/album?id=41029

Un saludo,

Leo

From: "Jeff Urban" <JURB6006@...>
To: [email protected]
Sent: Monday, April 30, 2018 7:09:08 AM
Subject: [TekScopes] OT : How About A Group For "Other" ?

I looked around and didn't find another group for other electronics repair
except for very specific ones. thinking about the poster who asked something
about a tube type audio amp I wonder if it might be a good idea to start a
group for such things.

Obviously everyone in this group works on Tek scopes, but I am sure that most
do not exclusively work on Tek scopes. I saw no group for
HP/Agilent/Keysight, whatever their name is now, nor Gould, actually none of
the above.

And, if opinions fly here, should it be restricted (well kinda) to test
equipment ? Should it be open to all electronics such as brownwares
(consumer goods) or perhaps there could be a different group for that ?

The goal here is to do what we do here, but about different electronic
equipment, hopefully without diluting the purpose of this group. I think
this group works well, but I also see a need for others.

What say you ?

What's interesting is my 465B developed the same problem when I took the
cover off (see "465B won't trigger" thread).
I noticed on slow time scales where more pulses are displayed that I could
clearly see a sine wave superimposed on the top and bottom edges of the
waveform. On the faster time scales (zoomed in if you will) the sine wave
isn't visible but the trace looks doubled. Probably because one sweep is at
one point in the sine wave and subsequent sweeps are at a different point.

I'm still working on mine so I haven't had a chance to put the cover back
on to see if it goes away. I've just suspected the scope is sensitive
enough to pick up stray AC, for instance from the fluorescent lights or
it's own power cord.

So try zooming out the waveform quite a ways and see if there is AC
superimposed. If you find a cause other than what I've mentioned I'd be
interested in knowing.

Thanks!

Lorn
KK4KRI
On Sun, Apr 29, 2018 at 04:26 pm, Offelis wrote:

I recently acquired a 465 in rather good condition, and have been

cleaning it

up over the weekend. Power supply rails have been checked to be within

spec,

including the -2450V one. CRT bias adjusted according to service manual

as

well.

Having just finished converting the volts/div indicator lights to LEDs, I
unfortunately stumbled onto a more serious seeming trace issue. At a low
intensity setting, the trace is as one would expect, albeit not

particularly

sharp, but still quite usable. However, at the intensities required at

faster

sweeps (50u/div and above), the trace takes a very peculiar appearance of
doubling itself! This can be controlled at will with the intensity knob,

and

the two "traces" appear when the focus is at sharpest. Here are some

pictures

of the issue:

The issue was not present just a day or two ago, so is it possible that

the

CRT has given up the ghost over the ~10 hours or so of power-on time

during

testing and adjustments? Hoping someone can shed light on this oddity.

I recently acquired a 465 in rather good condition, and have been cleaning it
up over the weekend. Power supply rails have been checked to be within spec,
including the -2450V one. CRT bias adjusted according to service manual as
well.

Having just finished converting the volts/div indicator lights to LEDs, I
unfortunately stumbled onto a more serious seeming trace issue. At a low
intensity setting, the trace is as one would expect, albeit not particularly
sharp, but still quite usable. However, at the intensities required at faster
sweeps (50u/div and above), the trace takes a very peculiar appearance of
doubling itself! This can be controlled at will with the intensity knob, and
the two "traces" appear when the focus is at sharpest. Here are some pictures
of the issue:

The issue was not present just a day or two ago, so is it possible that the
CRT has given up the ghost over the ~10 hours or so of power-on time during
testing and adjustments? Hoping someone can shed light on this oddity.

Carl,

I am in the market for a 547, but Chicago is a long way from mid state New York where I am. It is possible that in the future I’d be out your way, though.

Roy

Roy Morgan
k1lky68@...

On Apr 24, 2018, at 11:18 AM, Carl Hallberg via Groups.Io

<n9ess@...> wrote:

I see that people are still interested in the 547 scope. That is one of

the scopes I had at work in the 1960s. I have a 547 and a 546 to get rid of cheeeeap. I will not ship and I live about 60 miles from Chicago. We can talk about plugins if interested.

It worked both times.

-Chuck Harris

David M wrote:

Well, it happened again. I made sure to click the little "Quote Whole Post"

icon before replying, but the quoted text didn't make it into my reply.
Groups.io gone bonkers, or is it me? What am I doing wrong?

Dave M

On Sun, Apr 29, 2018 at 07:36 am, David M wrote:

Wasn't because I didn't try... I made sure to quote the original post in

my

reply, but I guess groups.io scrubbed it. I replied by "Reply to Group" at
the bottom of the original message (I get the digest format), and made sure

to

copy the original message text into my reply..
Anyway, sorry for the confusion.

Cheers,
Dave M

On Sun, Apr 29, 2018 at 05:43 am, Artekmedia wrote:

Many thanks for what ? Relevant prior post not included ????

On 4/29/2018 7:17 AM, NigelP wrote:

Many thanks for that; I'll look it up..... might even have some in the

transistor collection :).

Nigel Pritchard

On Apr 24, 2018, at 11:18 AM, Carl Hallberg via Groups.Io <n9ess@...> wrote:

I see that people are still interested in the 547 scope. That is one of the scopes I had at work in the 1960s. I have a 547 and a 546 to get rid of cheeeeap. I will not ship and I live about 60 miles from Chicago. We can talk about plugins if interested.