Keyboard Shortcuts
ctrl + shift + ? :
Show all keyboard shortcuts
ctrl + g :
Navigate to a group
ctrl + shift + f :
Find
ctrl + / :
Quick actions
esc to dismiss
Likes
- TekScopes
- Messages
Search
Re: Very Inexpensive 7623A, but Problems
I have added 19 photos to the "Sick 7623A" album showing the current symptoms and the "check-in" photos I took before doing any work on the instrument.
/g/TekScopes/album?id=260677 |
Re: Tek TLA700 software images. Suitable place to submit them to?
Sandra Carroll
The Boot Hard drive was bad
toggle quoted message
Show quoted text
-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Gary Robert Bosworth Sent: Wednesday, March 3, 2021 8:10 PM To: [email protected] Subject: Re: [TekScopes] Tek TLA700 software images. Suitable place to submit them to? What is a Primary HD? On Wed, Mar 3, 2021, 15:22 Sandra Carroll <smgvbest@...> wrote: I¡¯ve just been repairing a TLA714 and the primary HD was bad. So this |
Re: Tek TLA700 software images. Suitable place to submit them to?
What is a Primary HD?
toggle quoted message
Show quoted text
On Wed, Mar 3, 2021, 15:22 Sandra Carroll <smgvbest@...> wrote:
I¡¯ve just been repairing a TLA714 and the primary HD was bad. So this is |
Re: International Orders for Peter Keller's book were MAILED TODAY
Welcome Paul,
toggle quoted message
Show quoted text
If it's a "Bible" that you want you might also want to check out 'Encyclopedia of the Cathode Ray Oscilloscopes and Their Uses' by John F Rider, 1955. At 998 pages it's big enough to be a Bible! Peter's book is *great* but it's pretty much entirely devoted just to the CRT and it's development but the oscilloscope book covers oscilloscopes and not just CRTs. There are some amazing historical details in it. BTW you're lucky. *All* of the libraries in my area have quite using the inter-library loan service because of the costs. The Dash. On Wed, Mar 3, 2021 at 11:01 AM Paul Humel <humel@...> wrote:
I'm a newbie who joined this group recently and discovered the overwhelming |
Re: Tek TLA700 software images. Suitable place to submit them to?
Sandra Carroll
I¡¯ve just been repairing a TLA714 and the primary HD was bad. So this is something I¡¯d be interested in
toggle quoted message
Show quoted text
Sandra Sent from my iPhone 7 Plus On Mar 3, 2021, at 4:45 PM, ulf_r_k via groups.io <ulf_r_k@...> wrote: |
Re: PCB sockets for plug-in xtors/etc.
Here are three sources for Advanced:
toggle quoted message
Show quoted text
Vince. On 03/03/2021 04:51 PM, Jeff Dutky wrote:
Dennis Tillman wrote:I have seen something similar on GRiD laptops from the early to mid-80s, used for extra low-profile socket mountings on the CPU and FPU, for example. The original strips had a seal or gasket just like the Tek sockets. I was unable to find modern equivalents with the seal/gasket. I ended up ordering several strips of Advanced Interconnections Peel-A-Way sockets, but my sources for those have subsequently dried up. --
K8ZW |
Re: 547 HV Transformer: Bill Schell rewind failed
On Wed, Mar 3, 2021 at 01:19 PM, snapdiode wrote:
It didn't run for more than 30 minutes, and then failed ... or you didn't run it for more than 30 minutes? .... and then you turned it off. (In which case the working state is unknown.) |
Re: WSTRO, WSTROU, WSTRM WaveStar Software for Scopes & Meters
Mine worked perfect.
Gary On Wed, Mar 3, 2021 at 10:19 AM Dennis Tillman W7pF <dennis@...> wrote: Sometime ago I bought a sealed copy of this Tek software:-- Gary Robert Bosworth grbosworth@... Tel: 310-317-2247 |
Re: PCB sockets for plug-in xtors/etc.
Dennis Tillman wrote:
I'm only guessing that it's silicone. I've not gotten a great look at it, actually. I thought, in the GRiD laptops, that it was a solid seal over the top of the socket, based on first encountering it in the sockets for an unpopulated 8087, but that may also be inaccurate. -- Jeff Dutky |
Re: Very Inexpensive 7623A, but Problems
One thing that I've noticed on Tek equipment, is that the pin one indication is a triangle pointing to the pin.? The cable connectors are similarly labeled.? I liked it so much that it's what I use on my PC boards.
toggle quoted message
Show quoted text
I've also seen the pc land for pin 1 set to a square rather than a circle. Harvey On 3/3/2021 4:21 PM, Jeff Dutky wrote:
Jean-Paul, |
Re: PCB sockets for plug-in xtors/etc.
Sorry, Dennis, wrong question before. what is the spacing of the three pins and are the spacing angles 120¡ã? Or, what pattern?
toggle quoted message
Show quoted text
The datasheet at DigiKey does not come up. Larry On 3/3/2021 11:02 AM, Dennis Tillman W7pF wrote:
Hi Dave, --
Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near Disneyland) |
Re: TDS3064B "ripple" on calibrator signal
Unfortunately that isn't the problem ? Also tried other probes.
toggle quoted message
Show quoted text
D. -----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Dave Peterson via groups.io Sent: 03 March 2021 16:08 To: [email protected] Subject: Re: [TekScopes] TDS3064B "ripple" on calibrator signal David, In my limited experience, I have seen this behavior before, but it's always been due to probe issues. |
Re: PCB sockets for plug-in xtors/etc.
Dennis Tillman wrote:
I have seen something similar on GRiD laptops from the early to mid-80s, used for extra low-profile socket mountings on the CPU and FPU, for example. The original strips had a seal or gasket just like the Tek sockets. I was unable to find modern equivalents with the seal/gasket. I ended up ordering several strips of Advanced Interconnections Peel-A-Way sockets, but my sources for those have subsequently dried up. -- Jeff Dutky |
Tek TLA700 software images. Suitable place to submit them to?
Dear Forum,
I have an old Tek TLA700 Logic Analyzer complete with software disks: Application V 3.2 - 063-3022-04 ( 2 x CDRom ) Controller BIOS 1.00.14 for TLA704/711 - 063-2895-02 (1.44 Floppy) W98 Boot Floppy - 063-3418-00 (1.44 Floppy) If there is any interst in this, I'd be happy to zip them and submit the files but where? (I know there is a Logic Analyzer group but very few posts there) Cheers Ulf Kylenfall SM6GXV |
Re: PCB sockets for plug-in xtors/etc.
Dennis, do you know the appropriate finish hole size in the PWB for each of these replacement sockets?
toggle quoted message
Show quoted text
Larry On 3/3/2021 11:02 AM, Dennis Tillman W7pF wrote:
Hi Dave, --
Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near Disneyland) |
Re: Tektronix 606A that resists being repaired
Q714 is currently a Tektronix transistor marked 151-0606-00 referenced as Motorola SJE375 but I can't find any info on this device. The transistor that used to be there (broken) has no identification at all. I tried several MJE800 Darlingtons as listed in the manual but they fail because of rush-in current at startup. Can I add a small power resistor at the collector of Q714 to prevent this? Under normal operation, the current through Q714 seems to be about 1Amp (see below) so the MJE800 should work (4Amp rating)
If I set the cathode voltage at about -5000V (or a more positive value, max -4700), the device works find and oscillation doesn't stop anymore. The voltage drop across R714 in this mode is 1V or less (so 1 Amp current) and stays there. At -5000V, the image is clear but intensity control is limited. At -5500V, the specified value, the oscillation circuit eventually stops, after almost 30 minutes. Still using 1R for R715 because my experiments show that a higher value here increases the oscillator run-time (limits current flow through Q714 is my guess, thus postponing the thermal runaway). Once I install the faster diodes (UF4004), I'll try to original 0.5 Ohm R715 again. You say "The output will be shifted up if there is 1-ohm". I assume you are referring to U740 pin 6. Even at a limited cathode voltage of -5000V, the voltage here starts at 2V (with 1 Ohm R715). Note that the screen image is crystal clear with -5000V cathode voltage but I would like to completely fix this device. Should have more results in about a week. JdR |
to navigate to use esc to dismiss