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Re: SC502 Trace Issues - Beginning and ending of trace connected.
blanking problems.? You might want to check the CRT bias adjustments and similar voltages.? Turning down the intensity should make it vanish.? If not, then definitely blanking problems. Harvey
By Harvey White · #203977 ·
Photo Notifications #photo-notice
The following photos have been uploaded to the SC502 Trace Issues ( /g/TekScopes/album?id=293496 ) photo album of the [email protected] group. * IMG_2066.jpeg (
By Group Notification <noreply@...> · #203976 ·
SC502 Trace Issues - Beginning and ending of trace connected.
I posted a phot of my new problem. Someone with more experience than I will probably know! Please have a look. /g/TekScopes/album?id=293496 Thank You!
By Barry Breaux · #203975 ·
Re: Help with floppy drive
I solved the issue... Digged out my oldest Apple laptop, a 3400c, from about the same era than the AM700 and still working with MacOS 8. Once I formatted a floppy in that laptop the AM700 was
By Martin · #203974 ·
Re: I've done it! Finally, a real Tektronix book!
Is the 456 a typo in the table of contents? I think the issue you'll have is someone else recently done a very similar book and gave it away for free.
By David · #203973 ·
Re: about those vintage ceramic terminal strips...
Silver solder is still made and some RoHS lead free may qualify. See AIM We designed the 500 kHz Metcal SP-200 solder station in 1990, constant current resonant supply. 20 sec warmup time,
By Jean-Paul · #203972 ·
Re: Tek "CONSOLE PORT" TDS 5/6/7xx Oscilloscope Debug Card RS-232
I've thought about emulating the MC68681 for a 'proper' console debug card, but didn't need it bad enough. Not sure if it would be possible to meet timing requirements with a microcontroller, but it
By fenugrec · #203971 ·
Re: I've done it! Finally, a real Tektronix book!
Thanks to everybody! @Grayson: they are preparing a better sample pdf and yes, they ship everywhere. Congratulation for your book! Such more scientific than I am. It will be of great hep to me in the
By Gianni Becattini · #203970 ·
Re: about those vintage ceramic terminal strips...
3% appears to be optimum. Here is a table of soft silver alloys: Sn/Pb/Ag Solid - Liquid(C) 60/36/4 179-246 61.5/35.5/3 179-227 62/36/2 179-189 62.5/36.1/1.4 179
By SCMenasian · #203969 ·
Re: F.S.: Tek "CONSOLE PORT" TDS 5/6/7xx Oscilloscope Debug Card RS-232
I have a spare one I can sell you, shipped from Japan. It's small so shipping shouldn't be too bad as it can be sent as a 'small packet'. Jared
By Jared Cabot · #203968 ·
Re: about those vintage ceramic terminal strips...
Excerpt from the Tek Type Z plug-in manual: "Soldering Precautions In the production of Tektronix instruments, a special silver-bearing solder is used to establish a bond to the ceramic terminal
By Greg Muir · #203967 ·
Re: 7704A - Readout Stretches Vertically
Hi Albert, I can certainly try that. I'm almost to the point of just living with this. I've had the boards off and back on all too many times for this little bit of annoyance but I would still love
By n4buq · #203966 ·
Re: 7704A - Readout Stretches Vertically
I've been through checking most of that but there is certainly the possibility of something I haven't checked. I get proper waveforms for the timer chip (U33433). I could always try swapping U3480
By n4buq · #203965 ·
Re: What caused this on electrolytics in 422?
This mold happens on plastic knobs also. I take a heat gun to the knobs and the mold just disappears.
By Polaraligned · #203964 ·
Re: I've done it! Finally, a real Tektronix book!
Gianni, Congratulations! The book looks nice. Let us know when it is available in the states. I see it is 70 euro and sold out. I would FAR rather have a physical book than a PDF. I would be one of
By Mark Vincent · #203963 ·
Re: Free: Tektronix Scope evaluation board
If no one else wants it, I will take it. Just tell me the shipping fee. Gary Robert Bosworth Cellphone: 626-803-8336 E-mail: grbosworth@... Get Outlook for
By Gary Robert Bosworth · #203962 ·
Free: Tektronix Scope evaluation board
Free: Tektronix Scope evaluation board. 9V battery was stored but leaked anyways. Board will have to be cleaned up. Original beat up cardboard box. Never used. Sorry no model number visible on the
By Ken Eckert · #203961 ·
Re: 7704A - Readout Stretches Vertically
Another trick you can pull is to take the second scope, put it in XY mode, and look at the outputs of the character generator, I'd initially suggest the connectors to the V and H boards.? Should get
By Harvey White · #203960 ·
Re: 7704A - Readout Stretches Vertically
Hi Barry, With the same setup you can add a second input (plugin or channel) in the monitoring scope and display there the amplified signals present further on at the vertical amplifier board.
By Albert Otten · #203959 ·
Re: about those vintage ceramic terminal strips...
I imagine you can use it - on a good strip - but there's no repairing it once the silver that was bonded to the ceramic is gone. Now it's just bare ceramic. Dave
By Dave Wise · #203958 ·