Re: TM 504 Power Module Questions
EJP thanks for that important information¡to others as well. So I¡¯m realizing maybe some of my error in communication¡I was assuming the reference ¡°rear interface¡± was specific to the
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sweetbeats
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#184637
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Re: Tektronix RAMS (Surplus) Store - Odd hours?
To bring this back to topic, what are the sorts of things one finds at the store?? Still very curious even if I won't be able to shop there soon.Are the deals good? ? Dan
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Daniel Koller
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#184636
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Re: 7904A compress sweep
Good thought, could be that, but if the gain setting pot was intermittent, then I would expect it not to clip, since the amplifiers are designed to enable off screen deflection. Perhaps another one?
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Harvey White
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#184635
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Re: DM502 with problems
Not all TI sockets were bad even if of course some could fail just like any other brands. The one that stands out of the crowd is called C-95. In my opinion there is not a question if it would fail
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zenith5106
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#184634
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Re: DM502 with problems
Great feedback Harvey. I should have thought to inject the timer signal . . . I'll give that a try. Jared - i found your video a few days ago. Thanks for taking the time to create/upload it.
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Richard Peterson
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#184633
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Re: 7904A compress sweep
Sounds like it could be as simple as an intermittent pot in the horizontal section.
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Precaud
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#184632
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Re: Fixing a 7603 Power Supply
That and your systematic approach, Jeff. Congratulations! Cherish that 7603. The big screen is soo nice. I hope you can get your Option 1 out. Raymond
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Raymond Domp Frank
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#184631
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Re: [HP-Agilent-Keysight-equipment] OT: Looking for a Pentium M765 (or maybe M780 - not sure it that will work)
Oh yes and I forgot - it needs to run Windows XP Embedded as some of the driver software doesn't like W7 or later. David
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David C. Partridge
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#184630
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Re: [HP-Agilent-Keysight-equipment] OT: Looking for a Pentium M765 (or maybe M780 - not sure it that will work)
Yes, I got that thanks, problem is there's no room inside the case to add a card like that. David
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David C. Partridge
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#184629
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Re: Members in Australia
Hi Allan, Sounds like a good idea, I just checked the site out it does not seem to have much going on? not many users?
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Garth Daddy
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#184628
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Re: Members in Australia
Thanks Allan :-) It is so difficult to find vintage Tek stuff out here in Oz. We¡¯re not as lucky as the folks in the U.S.A. Cheers, Rick Melbourne - AUS
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momemeca
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#184627
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Re: Fixing a 7603 Power Supply
Congratulations, Jeff! It's always nice to hear that perseverance pays off, and doubly nice that a couple jelly bean parts were all it took. Cheers Tom Sent from an iThing; please forgive the
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Tom Lee
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#184626
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Re: Fixing a 7603 Power Supply
Also, a comparatively minor success, but noteworthy: I also fixed a 7A18A that I was using to test the 7603, but which did not have any signal on Ch 2, nor any ability to adjust the vertical position.
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Jeff Dutky
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#184625
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Re: Fixing a 7603 Power Supply
Nice job Jeff! Great way to start the weekend. Save those dead transistors. Might make for interesting examples for the curve tracer when you get that up and running. Dave
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Dave Peterson
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#184624
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Re: Fixing a 7603 Power Supply
ACTUAL SUCCESS! First I traced the INTENSITY control signal through the logic board, and checked Q90, Q108, and U99 (a C3046 transistor array). All of those checked out fine. Then I traced the gate
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Jeff Dutky
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#184623
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Re: Tektronix RAMS (Surplus) Store - Odd hours?
Good deal!? I think we've taken this far enough off topic. ;)? To bring it back to Tek scopes, I am in the process of getting a hold of an 11800 series scope on the bay and selling my Atlas Sound
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Jim Ford
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#184622
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Re: Members in Australia
HI Guys Just thought I would mention an option for selling/buying gear in Australia/New Zealand (only) that does not have any fees at all! VK Classifieds (vkclassifieds.net.au) has been around for
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Allan
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#184621
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Re: Tektronix RAMS (Surplus) Store - Odd hours?
We were lucky enough to buy an empty lot, and have a house built on it.? The builder was just at the point where they would still consider custom modifications, so we put in a few, mostly having to
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Harvey White
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#184620
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Re: DM502 with problems
I repaired one of these not too long ago, the video I made might help. https://www.youtube.com/watch?v=Tx6DtLooCOs My unit had drifting carbon composite resistors that were replaced, the usual sticky
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Jared Cabot
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#184619
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Re: DM502 with problems
If the 555 is being fed with the right Vcc and the other components are ok (did you verify that the pot was working?), then you should see a clock output. Finding a 555 is trivial, so you should have
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Tom Lee
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#184618
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