Re: scanned: 545B and 561 Instrument Reference Books
Here is the Type 60 / 2A60 Instrument Reference Book: http://w140.com/tekwiki/images/0/0e/Tek_type_60_irb.pdf
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Kurt Rosenfeld
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#150391
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Re: 2215A LVPS repair
Hi Leo, Thanks for your feedback / experiments :-) About the fan, easiest is to use a simple fan without any electronics in it to begin with ;-) A standard two wire fan, or a 3 wire fan where you just
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Vince
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#150390
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Re: 2215A LVPS repair
Hi all, here is my follow up on the FET replacement in my 2215A, and the adding of an optional fan. Using a P9NK70ZFP (the working one I started with) gave a FET housing temperature of 68 degree
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satbeginner
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#150389
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Re: Calpak VS AFG
Timothy, The AFG 3252, for square waves, is spec'd for a time equal or less than 2.5ns, which is good enough to calibrate a 25MHz scope (which has a risetime of 14ns). But it wouldn't cut it for a
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Fabio Trevisan
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#150388
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Re: No trace on 556 :(
I'm mostly curious how you determined if the wound coil was good without installing it inside the scope.
By
thespin@...
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#150387
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Re: Name that part - 465B
Or support for board? Den tors 9 aug. 2018 18:40Jeff Urban <JURB6006@...> skrev:
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G?ran Krusell
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#150386
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Re: Name that part - 465B
The focus control perhaps ??? Maybe that's where I saw one.
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Jeff Urban
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#150385
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Re: Snubber capacitors
Fine and good but watch what you plug in together. ALot of iron can be dangerous. At first glance you think OK, inductors in parallel so less kick but that is not so. That means the total current
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Jeff Urban
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#150384
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Re: Snubber capacitors
I've been loosely following this topic with some interest. From a simple wear perspective, I use an external power switch for my equipment because of the older equipment I own and the difficulty of
By
[email protected]
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#150383
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Re: No trace on 556 :(
I have the parts to build a winding machine if necessary. What did the test jig look like?
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thespin@...
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#150382
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Re: No trace on 556 :(
Morris?Can you get the info on wire size and turns required to rewind transform from your friend that did them , was thinking of trying to rewind my 547 and 556 in case my 556 hv went down , thanks .
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oliver johnson
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#150381
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Re: Options And Versions Curiosity
Jeff, the meaning of a suffix after the model name and of the Options is given in the catalogs. For instance, catalog 1987 says a 2465A CT is a 2465A with Option 9 (GPIB) and Option 10
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Albert Otten
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#150380
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Re: No trace on 556 :(
From bitter experience I can confirm that both HV transformers in the 556 are prone to the thermal runway problem that has been discussed here ad nauseam with regard to the 547 and some other scopes.
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Morris Odell
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#150379
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Re: Options And Versions Curiosity
Possibly counter timer?
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Brendan
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#150378
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Options And Versions Curiosity
OK specifics first. 561A - what is MOD 210E 2465 - what does the CT suffix mean ? I also would like some info, maybe better opinions on the different phosphor options. Someone could give me a link to
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Jeff Urban
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#150377
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Re: 464-466 w/dm44
Michael, back in high school radio class our crystal radios weren't that sophisticated you had a chunk of crystal a BASIC AM receiver and a cats whisker wire to scratch the crystal till you picked up
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v_12eng@...
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#150376
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Re: 464-466 w/dm44
I would think that Tektronix would have used 'bed of nails' test fixtures to test blank circuit boards before stuffing them. That would cull open or high resistance vias. As far as using the silicone
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Michael A. Terrell
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#150375
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Re: scanned: 545B and 561 Instrument Reference Books
Here is the Type 59 Instrument Reference Book. http://w140.com/tekwiki/images/d/da/Tek_type_59_irb.pdf
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Kurt Rosenfeld
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#150374
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Re: No trace on 556 :(
Okay I managed to get my hands on a tube tester, and it looks like V1300 is dead. There's a very good chance that V1300 just simply gave out at high current... but I really want to rule out a short
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thespin@...
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#150373
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Re: 464-466 w/dm44
Wow Jim, Scratch crystal tuning is awesome! Never thought this was something doable. 10 words per minute morse code seems quite impressive (to me at least, but I've never been much into Ham and less
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Fabio Trevisan
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#150372
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