On Jul 13, 2021, at 14:05, nj902 <wb0emu@arrl.net> wrote:

Cursors as in highlighted dots (or bars) that can be moved along the trace with a corresponding method of determining time and voltage..

A second part of the question (if the answer is different) - which was the first Tektronix scope to have cursors.

They were in the 468

On Tue, Jul 13, 2021 at 11:05:06AM -0700, nj902 wrote:

Cursors as in highlighted dots (or bars) that can be moved along the trace with a corresponding method of determining time and voltage..

A second part of the question (if the answer is different) - which was the first Tektronix scope to have cursors.







!DSPAM:60edd5dc299085352711267!

They were in the 468

On Tue, Jul 13, 2021 at 11:05:06AM -0700, nj902 wrote:

Cursors as in highlighted dots (or bars) that can be moved along the trace with a corresponding method of determining time and voltage..

A second part of the question (if the answer is different) - which was the first Tektronix scope to have cursors.







!DSPAM:60edd5dc299085352711267!

Cursors as in highlighted dots (or bars) that can be moved along the trace with a corresponding method of determining time and voltage..

A second part of the question (if the answer is different) - which was the first Tektronix scope to have cursors.







!DSPAM:60edd5dc299085352711267!

Yesterday was a really nice day.
The temperature was perfect, the sun was out.
I was on the deck of our little summer house working on my computer.
In front of me across an inlet of Puget Sound I can see snow covered Mt
Rainer 40 miles away.

Suddenly my cell phone rings.
Annoyed! I pick it up to look at the screen and it says in all capital
letters:
AUSTRALIA
Underneath that seemingly giant word is a strangely formatted phone number.
That strange format could only belong to an international telephone number.

This is exactly what my brain said to me in the next 2 seconds between the
2nd and the 3rd ring.
"Holy Crap!"
"It's a mistake"
"I don't know anyone in Australia"
"It's a robo-call. It must be"
"Wait a minute, nobody makes robo-calls from Australia"
"The number format means it really might be coming from Australia"
"Why would anyone want to call me from Australia"
"It's a new trick by the robo-callers to get people to answer and listen to
their recordings"
"They must have mis-dialed"
"They accidentally sat on their phone and pressed a bunch of numbers at
random"
"I don't know anyone in Australia" (that was the second time my brain said
this to me to make sure I got the point)

Then my brain shut up for a moment while it waited to see what I would do
next.
I realized someone probably went to a lot of trouble to find me. So I
answered.

ARGH! It was someone from TekScopes who was very concerned that I was OK
because I disappeared about 4 weeks ago without a trace. We had a very long
talk about what was going on. I was in a depression and couldn't get out of
it. I was overwhelmed with all the things going on in my life - most of them
it seemed to me were going badly. I have suffered from depression almost my
entire life. Until I was in my late 40s I had no idea this was the case. By
then I spent several years in therapy with several different therapists and
eventually one Psychiatrist I was seeing worked out the right balance of
medications for me to take for the rest of my life to help me avoid falling
into another depression. Depression is a learned behavior and the real
danger about it is that the more it happens to you the easier it is to
become depressed. Once I am in one it is like a trap and I can't get out.

But the phone call and the conversation I had with the caller - he said his
name so fast I didn't have a chance to get it was wonderful. He understood
completely what I was going through. That call made it possible to spend
most of today catching up on my email and facing the world once again. I'm
still a little shaky (mentally) but I think (I hope) I will be on my feet
again (mentally) in a few days.

In the meantime I would like to thank Michael Dunn for covering for me. He
and I both agree I could use help with TekScopes because it beginning to
take up too much of my time (that was one of the things I was not able to
spend enough time on but I didn't know how to fix it).

Give me a few days to get caught up
Dennis Tillman W7pF
Thank you for your concern!!!
That really means a lot to me.
I'm happy to be back!!!
Who was it that called me all the way from Australia. I need to thank them
personally.

I also have a PDP-12, though mine uses a DEC VR14 for the monitor. It's a
11 or 12" CRT with magnetic deflection and a P7 phosphor. It also has two
TU-56 DECTAPE units but unfortunately no DF32 or paper tape reader/punch. A
few photos of the PDP-12 are here:

http://www.dvq.com/dec-pdp12/

The VR14's tube was not lighting up so I removed it. Turns out the base
was loose and actually fell off. Nothing was broken, the wire pins out of
the back of the CRT just were not soldered to the base anymore. I
re-soldered them and glued the base back on and now the tube lights up.
There's still work need on the deflection amps though.

Here's a photo of my 12 bit DEC collection showing the LINC-8 next to the
PDP-12. http://www.dvq.com/dec-pdp12/dec-12bitters.JPG

The PDP-12 is built out of M-series flip-chips where were TTL based. The
LINC-8 uses mostly R series transistor, no IC, modules. It a few years
older than the PDP-12. At the far right is a PDP-5 which used system
building block modules. They were made out of germanium transistors. Same
modules as used in the original LINC computer and DEC PDP-1.

There's two Tek 7954 scopes at the left, and an RM-503 above a PDP-8/i.
That has a nice, bright, P2 phosphor CRT.

The LINC-8 is going to be a big project. It's missing around 100 cards for
one, then the badly burned CRT, and it's missing it's LINCTAPE drive.