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Re: FG504 and failed Q270 (SPS2927)
Many thanks for that; I'll look it up..... might even have some in the transistor collection :). Nigel Pritchard
By NigelP · #147348 ·
Re: Nuvistors
https://www.youtube.com/watch?v=LPExywj5pJM -----Mensaje original----- De: [email protected] [mailto:[email protected]] En nombre de Chuck Harris Enviado el: domingo, 29 de abril de 2018
By Miguel Work · #147347 ·
Re: Nuvistors
The tunnel diode indeed does have the V/I curve shown in the books, but only if the load resistance is zero, or very near zero. The slope of that load resistance's load line has to be so steep that
By Chuck Harris <cfharris@...> · #147346 ·
Re: Hello from new old member
Hi GeorgeP, I'm over in Toronto, Ont., I don't mind driving over for big items. I only saw 5 items on Ebay, can you post a list we could look at? Thanks, Peter
By petertech99h · #147345 ·
Re: 700 Pages of Tekscope, back to 1959, searchable, PDF download: https://ia800209.us.archive.org/21/items/tektronix_Service_Scope_Oct_1959_-_Sep_1971/Service_Scope_Oct_1959_-_Sep_1971.pdf
Hi Dennis, "Dennis Tillman W7PF" <dennis@...> wrote: I've used archive.org a lot - but wasn't aware of using the "search metadata" tool to create a compilation of an subject such
By Lyle Bickley · #147344 ·
Re: 700 Pages of Tekscope, back to 1959, searchable, PDF download: https://ia800209.us.archive.org/21/items/tektronix_Service_Scope_Oct_1959_-_Sep_1971/Service_Scope_Oct_1959_-_Sep_1971.pdf
That's not all... there is much more Tektronix manuals, catalogs, app notes, etc on this site. https://archive.org/search.php?query=tektronix&page=2 Dennis Tillman W7PF
By Dennis Tillman W7pF · #147343 ·
Re: 700 Pages of Tekscope, back to 1959, searchable, PDF download: https://ia800209.us.archive.org/21/items/tektronix_Service_Scope_Oct_1959_-_Sep_1971/Service_Scope_Oct_1959_-_Sep_1971.pdf
On Sun, 29 Apr 2018 01:36:22 +0000 (UTC) "HankC, Boston, WA1HOS via Groups.Io" <hankc918@...> wrote: Thank you, Hank!!! Lyle -- Lyle Bickley AF6WS
By Lyle Bickley · #147342 ·
Re: Help with 24x5B processor board A5 and option 5 timer trigger
The original mask is unscathed.? But I am surprised that Tek did not cover the guard traces with mask.? They are just traces after all and covering them with mask would simplify repairs like
By machineguy59 · #147341 ·
700 Pages of Tekscope, back to 1959, searchable, PDF download: https://ia800209.us.archive.org/21/items/tektronix_Service_Scope_Oct_1959_-_Sep_1971/Service_Scope_Oct_1959_-_Sep_1971.pdf
?HankC, Boston WA1HOS
By HankC, Boston, WA1HOS · #147340 ·
Re: Nuvistors
See this 1961 GE TD manual: https://ia802701.us.archive.org/3/items/GeTunnelDiodeManual/Ge1961TunnelDiodeManual.pdf The curve tracer circuit begins on page 66. You need very low resistance and
By Ed Breya · #147339 ·
Re: 453 cleaned up and running.
Wow, what a nice clean up job you did... makes mine look like a mess, by comparison!? Congratulations. Phil
By Phillip Potter <p.potter@...> · #147338 ·
Re: Help with 24x5B processor board A5 and option 5 timer trigger
My question would have to be: did you damage that solder mask the last time you worked on the MUX? If not, it should be fine the way it is. It is the flux that allows the solder to pull back into a
By Chuck Harris <cfharris@...> · #147337 ·
Re: Nuvistors
Hi Ed, I know through artifice that you can create plots of a tunnel diode. A 576 will do it directly, but it does not match the actual operation of the part, When the TD gets to the threshold
By Chuck Harris <cfharris@...> · #147336 ·
Re: Nuvistors
The Tek parts in the serial 20,000+ 453s were N-channel JFETS, a dual FET, Tek part 151-1011-00 in the front ends, and individual FETs, Tek part 151-1005-00 in the sweep and trigger generators. The
By Dale H. Cook · #147335 ·
Re: FG504 and failed Q270 (SPS2927)
From the Tek semiconductor data book, the 151-0438-00 was superseded by 151-0712-00, both of which cross to an MPSH81. Cheers, Dave
By David M · #147334 ·
453 cleaned up and running.
I would like to thank one of the list members (you know who you are). It cleaned up nice. I changed the fan last night and replaced the variable time pot today. Here it is cleaned up and running.
By Brendan · #147333 ·
Re: Intermittent no trace / sweep.
"of" = "or" One of my more common typos.
By Jeff Urban · #147332 ·
Re: Intermittent no trace / sweep.
"( I mentioned I have a shop manual so why do I get advise to download it ?)" I knew that. "BTW I have been using this particular scope professionally for few years" I did not know that. From what
By Jeff Urban · #147331 ·
Re: Nuvistors
Yes, the driver in my description is voltage, and the current changes with voltage. Sorry for the confusion. -Chuck Harris Raymond Domp Frank wrote:
By Chuck Harris <cfharris@...> · #147330 ·
Re: 500-series fan motor disassembly.
Hi there, Just going again into this problem so trying to bring back to life this thread, hoping that someone with experience on this would like to share a good mechanical tip to disassemble the
By Sebastian Garcia · #147329 ·