Re: Tek 475.
Hi Jim, Tektronix has always been terrible about identifying these little power filter circuits. I rarely can find them on any part's layout in the manuals. The schematic where the filters are located
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Chuck Harris <cfharris@...>
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#159489
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Re: Tek 475.
Good morning Michael. Many thanks for the info/link. I downloaded it and it is slightly different to mine. I found the 3, 10 ohm resistors in the +15 volt supply on page 216. However none of them
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James R. Bartlett
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#159488
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Re: Tek 475.
Jim, Page 216 of 293 in the version of the 475 manual that I am looking at. TEKWiki has a couple of versions for that instrument. here is the link: TEKWiki is a great resource. Best of luck on your
By
Mlynch001
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#159487
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Re: Tek 475.
Thanks Michael, I have a few higher voltage Tants so will use a 35 or 50 volt one. Can you point me in the direction on the schematic where I can see that resistor. Will replace it as well. Again
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James R. Bartlett
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#159486
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Re: 502A - Anyone looking to part with one?
Now THAT would be an awesome story to hear! :-D If I ever get the opportunity, you know I will be posting about it!
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Jason A.
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#159485
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Re: Tek 475.
Jim, FYI, found this on Page 216 of 293 in the version of the 475 manual that I am looking at.? The LV supplies are populated with many of these filters.? So a good chance that others are on the
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Michael W. Lynch
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#159484
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Re: Tek 576 Curve Tracer HV Transformer winding
Update: 576 Transformer Inductance Resistance AWG mm Turns N AL=L/N^2 AL nH Volts Pin 2-3 305,8E-6 168,5E-3 25 0,45 26 452,4E-9 452 49,8 Pin7-8 918,6E-3 385,0E+0 40 0,08 1400 468,7E-9 469 2700 Turns
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Miguel Work
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#159483
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Re: Tek 475.
Jim, I found it in the 475 manual as well. Just in a different location on the schematics. It just took a bit of searching. I have a 475A that I was able to bring back from oblivion and I was more
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Mlynch001
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#159482
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Re: Greeting from Stan
I tied the wayback machine, this may or may not be useful. There are other web archiving crawlers.... https://web.archive.org/web/2017*/http://www.reprise.com/host/tektronix/ wrote:
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Ken Eckert
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#159481
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Re: 502A - Anyone looking to part with one?
You know, I recall he was asking $150 for it originally, and after about a week or so he dropped the price to $50. So a tube scavenger reached through the internet with their long straw and sucked the
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Jamie Ostrowski
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#159480
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Re: 502A - Anyone looking to part with one?
Oh geeze, really? I noticed it had said "No Bulbs", but all his photos showed all the tubes in it, so I wasn't sure what he was talking about. That's a shame. [email protected]> wrote:
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Jamie Ostrowski
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#159479
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Re: Old Tektronix Books
Sure, I will upload to those other sites as well. Thanks! I've just finished uploading a copy up on the wiki under Reference Material->Fundamentals. Jamie
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Jamie Ostrowski
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#159478
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Re: 502A - Anyone looking to part with one?
He also sold all the tubes out of it separately.
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Jason A.
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#159477
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Re: Greeting from Stan
Is there any record of it in the web archive site? I'd have to scrounge my emails to find the site.... wrote:
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Ken Eckert
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#159476
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Re: Greeting from Stan
We have inquired about the CRT Cross Reference and that database is gone. However, the museum published a 1976 CRT Index document. That, along with the RPR has the same information, just not as
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Dave Brown
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#159475
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Re: Tek 475.
Hi Jim, I would be 99% certain that changing the cap will fix it. I've seen identical symptoms and faults in a 7912AD. Browned off 10 ohm resistors and bead tants all over the thing. ?I actually
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Adrian Nicol
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#159474
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Re: Tek 475.
I have no great objection to replacing a tantalum filter with a low impedance aluminum electrolytic, but be sure that you understand that aluminum electrolytic capacitors loose about 1/2 their value
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Chuck Harris <cfharris@...>
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#159473
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Re: Tek 475.
Not to worry Michael, I know the feeling only too well, having used up my 3 score and ten years, everything else is a bonus? Interesting it is shown in the 475A but not the 475. Who knows what
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James R. Bartlett
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#159472
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Re: Tek 475.
Chuck, I will continue to learn and contribute when I am able. I do learn from my mistakes. You would make more mistakes than I, only because you work on a lot more equipment than I do. I tend to
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Mlynch001
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#159471
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Re: 502A - Anyone looking to part with one?
Notice this is a very early 502. It has no variable pots for the vertical attenuators.
By
John Williams
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#159470
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