Dave,Interesting device. Thanks for sharing it with the group.George

I found a dead transistor in the Z Amp, which prompted me to check all the
Z Amp transistors, but the rest are OK. My 453A does this on the fastest
sweep setting, but only half a major division, and my 7834 not at all. The
Z compensation adjustment capacitor has no effect, so I`ll look in the
sweep section for the adjustment.
Thankyou........................................................................................................................................................................................................................Don
C.

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Those are Tek-made, hermetically sealed plastic film caps, and should never fail in normal use. Let them be. Ed

That is not an aluminum electrolytic capacitor. That is
a very high quality capacitor, leave it alone.

Really, if you are replacing parts like that, you are doing
your scope great harm.

-Chuck Harris

lop pol via Groups.Io wrote:

Well that was a giant fail.

https://ibb.co/fbgOKG

Here is a picture

https://s3-us-west-1.amazonaws.com/groupsiophotos/9741/17334/208040/thumb/20180123_110000.jpg?AWSAccessKeyId=AKIAJECNKOVMCCU3ATNQ&;Expires=1516730758&Signature=xoOOpvXxuGWiPZCVuOjkNmWJN3Y%3D

The body of any aluminum electrolytic capacitor that
I am aware of is made from aluminum. It won't solder
without special efforts.

Could you be more specific?

-Chuck Harris

lop pol via Groups.Io wrote:

Thank you, Philip, for the memory jog. I've seen that style of tag, many times, but forgot due to years of non-refresh.

Dave Wise
________________________________________
From: TekScopes@groups.io <TekScopes@groups.io> on behalf of Phillip Potter <p.potter@sbcglobal.net>
Sent: Monday, January 22, 2018 7:14 PM
To: TekScopes@groups.io
Subject: Re: [TekScopes] Serial number location for 7603

Here you go, and thanks for the prompt, Dave Casey!

https://groups.io/g/TekScopes/album?id=17107&;p=Name,,,20,1,0,0


On 1/22/2018 5:50 PM, Dave Casey wrote:

On the 7603, 7613, and probably others, the serial number is a sticker just
like the ones found on the plugins. It is not stamped, nor is it on one of
those inserts like other equipment (7854, 2336, 492, etc). How many of my
7603's would you like pictures of as proof?

Dave Casey

I'll take your word for it until I have time to independently confirm.

Sorry to the rest of you for reducing the signal to noise ratio. I was trying to help, but sometimes that goes wrong.

Dave Wise
________________________________________
From: TekScopes@groups.io <TekScopes@groups.io> on behalf of Dave Casey <polara413@gmail.com>
Sent: Monday, January 22, 2018 5:50 PM
To: TekScopes@groups.io
Subject: Re: [TekScopes] Serial number location for 7603

On the 7603, 7613, and probably others, the serial number is a sticker just
like the ones found on the plugins. It is not stamped, nor is it on one of
those inserts like other equipment (7854, 2336, 492, etc). How many of my
7603's would you like pictures of as proof?

Dave Casey

On Mon, Jan 22, 2018 at 7:27 PM, Dave Wise <david_wise@phoenix.com> wrote:

The sticker is likely a property ID tag having nothing to do with S/N.
Serial numbers were stamped in metal, on the front panel itself for early
products, later on a slug that was press-fitted into the panel.

Dave Wise

There are several caps on the timing board and on the inverter board that seem to be grounded by soldering to the body of the capacitor. Is this necessary to replicate?

I agree - ceramic caps hardly ever fail, especially in ordinary supply bypassing applications. They can get leaky, though, but that hardly matters for bypassing. I can recall only three ceramic cap electrical failures over the last decade or so. One was a HV type in the cathode supply of a scope, and the others were in PLL circuits, where leakage upset operation - one in a Rb standard, and one in a HP8566B. I have seen a few that were cracked and such, but that's mechanical failure due to external issues.

Ed

That was a fast reply and I like the answer. Thank you.

No.

lop pol via Groups.Io wrote:

I am close to finishing up with a 485 total electrolytic/tant recap. Should I replace the power supply/horizontal amp ceramics?

That is due to the amount of time the z-axis circuitry
takes to get the beam lit up and going. There is an
adjustment to minimize the effect, but it isn't perfect.

-Chuck Harris

donald collie wrote:

When I look at a 100Mhz signal, instead of starting at the left of the CRT
graticule, the trace starts at the 2nd major division - 2 divisions to the
right of the Left Hand Side. Is this normal?
This happens on both A, and B sweeps, at maximum sweep speed only. Your
comment will be appreciated.
Regards.................................................................................Don
Collie jnr.

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I was wondering if FB performed some sort of advertising gimmick at first where searching was more consumer grade built into the website to build a larger customer database; then changed over to requiring more proprietary paid government, law enforcement or corporate services if not custom API programmed software to be able to mine the data since reminds me of a more advanced human information management system. Interesting how came out around the time the fusion centers were being implemented.

I don't mind personally since the more I study outside the USDA, DHHS, DOT, OSHA, DOI, DHS regulated industries... seems the narcissist, psychopath or sociopath criminal prefer the most isolated with least connections with something to steal from as a victim. DOD and DOJ sure does pander some strange deviant and sodomizing characters and operations.

Definitely isn't a six sigma or even lean sigma operation along with their sub jurisdictions from my experience... so I do understand why many don't like being on FB. I prefer being itemized more in my routines for the record in at least a lean sigma environment. That's why I like audit trails also, validated systems and am learning more of the range of EMF's in the EMS thanks to Tektronix systems now days before the straight shooting elders expire and we're left with queer junk trash.

Thanks! Just located it.
Kind regards,
73 de VU2UT

On Tue, Jan 23, 2018 at 3:01 PM, Sudipta Ghose VU2UT <oneghose@gmail.com>
wrote:

Can I please have the FB Page link posted here?
I am a little dumb.
73 de VU2UT

On Tue, Jan 23, 2018 at 9:37 AM, The Guy via Groups.Io <
nicolas.sog=yahoo.com@groups.io> wrote:

Well said Dennis, let`s eventually just find a way to complement each
other if you want.
And please feel free to ask me for anything, if you want me to publish
something... or really, anything,just ask.I`m there to help you.
I hugely value what you have accomplished here and I have no
expectations with the facebook group other than having a place over there
to enjoy and raise awareness about how awesome the original engineering

at

Tek was.I will never try to put my feet over this group.
Take care.

On Monday, January 22, 2018 11:56 PM, Dennis Tillman W7PF <
dennis@ridesoft.com> wrote:


To be crystal clear: The Groups.io based TekScopes is not going

anywhere.

If the newly introduced Facebook page proves to be more useful, up to
date, easier to use, more user friendly, or more valuable then it will
deserve to succeed for what it offers people.

But there is no place for disparaging replies.

Dennis Tillman W7PF
TekScopes Moderator



--
Dennis Tillman W7PF
TekScopes Moderator

--
One of those ... ...

--
One of those ... ...

Can I please have the FB Page link posted here?
I am a little dumb.
73 de VU2UT

On Tue, Jan 23, 2018 at 9:37 AM, The Guy via Groups.Io <
nicolas.sog=yahoo.com@groups.io> wrote:

Well said Dennis, let`s eventually just find a way to complement each
other if you want.
And please feel free to ask me for anything, if you want me to publish
something... or really, anything,just ask.I`m there to help you.
I hugely value what you have accomplished here and I have no
expectations with the facebook group other than having a place over there
to enjoy and raise awareness about how awesome the original engineering at
Tek was.I will never try to put my feet over this group.
Take care.

On Monday, January 22, 2018 11:56 PM, Dennis Tillman W7PF <
dennis@ridesoft.com> wrote:


To be crystal clear: The Groups.io based TekScopes is not going anywhere.

If the newly introduced Facebook page proves to be more useful, up to
date, easier to use, more user friendly, or more valuable then it will
deserve to succeed for what it offers people.

But there is no place for disparaging replies.

Dennis Tillman W7PF
TekScopes Moderator



--
Dennis Tillman W7PF
TekScopes Moderator

--
One of those ... ...

It's not that useful if the information is difficult to find at a later
date and not in a place where people with the expertise frequent. Facebook
has its uses, but please don't use it as an alternative to this list.

Malc