Keyboard Shortcuts
ctrl + shift + ? :
Show all keyboard shortcuts
ctrl + g :
Navigate to a group
ctrl + shift + f :
Find
ctrl + / :
Quick actions
esc to dismiss
Likes
- TekScopes
- Messages
Search
|
Re: 7704a
Brian Goldsmith
toggle quoted message
Show quoted text
----- Original Message -----
From: "Dennis L. Wade Would someone post a quick opinion on a 7704A with (3) 7A26 Dual Trace Amp, (2) 7A18 Dual Trace Amp, and one each of 7B70 Time Base, 7B71 Delay Time Base, 7D15 255 MHz Universal Counter Timer and 7B53A Dual Time Base. *** Nice!!!!! Quick enough? :-) Brian Goldsmith. |
|
7704a
Dennis L. Wade
Would someone post a quick opinion on a 7704A with (3) 7A26 Dual
Trace Amp, (2) 7A18 Dual Trace Amp, and one each of 7B70 Time Base, 7B71 Delay Time Base, 7D15 255 MHz Universal Counter Timer and 7B53A Dual Time Base. Thank you...Dennisopinion----------------- "If you can remain calm, you just don't have all the facts" Dennis Wade KG6ZI Carmichael, CA |
|
Re: Bias batteries in 7S14
I was eager to check out the teknetelectronics site Jeans wrote about:My understanding is that 'membership' is free. They never collected any fees from me, did not even try to. Keep in mind that company is in rental business and purpose of this site is to substitute missing operating manuals. No rental customer repairs or calibrates equipment and I was surprised to find any service manuals. I guess, those are the ones that leaked through the system. The manuals I downloaded were incomplete and disorganized as if whoeverI would say, there is no 'as if', guy who ran paper through the scanner did not care what came out as long as it was any kind of image. Since I am into guessing business, I would say that scanning was done by a service company and when customer asked why pages are not aligned they told him that can be done, too, but price is triple. As for incomplete manuals, I would guess that parts were omitted to save the cost. As I already said, those manuals are intended for rental customers to use as operating instructions. Few manuals that have schematics, surprisingly one for 7S14 does, are possibly early scans, before accountants got billing for scans or ones that leaked through the system. I would be very hard pressed to argue differently, even when talking about good scans, like ones available on e bay, but for something that I would just glance at, like things that I do not own but am curious about circuit, scans would have to do. Any kind of a small paper manual (e.g. for plug-in) is upward from $10, frequently $20 and that makes it an expensive proposition. As for good way to scan fold out sheets, there is a claim by one e bay vendor that he has a scan of the whole page and if printed at the place that can handle B size paper, fold out sheets are usable. Have not seen any of those schematics, just saw vendor's claim. Regards Miroslav Pokorni |
|
Re: Bias batteries in 7S14
Dennis Tillman
Hi Everybody,
I was eager to check out the teknetelectronics site Jeans wrote about: in hopes I could find a few of the really rare manuals I still haven't been able to locate for my collection. But the site is a bit of a disappointment. The quantity is there but the quality is lacking. When you sign up for the free 30 day trial you can download 5 manuals. But unfortunately you get what you pay for. They are free. But if the three Tek manuals I chose to download are any indication of the overall quality of the site I would not be willing to pay for a subscription. The manuals I downloaded were incomplete and disorganized as if whoever scanned them was not paying attention to what they were doing. Personally I prefer paper. Its much easier to grasp the big picture with a paper manual and as far as I know no one has yet to come up with a good way to scan the foldout pages. For those people who prefer their manuals in PDF format I would suggest buying from one of the people selling them like that on eBay. The eBay sellers have more of an interest in maintaining their reputation for doing a quality scanning job. Dennis |
|
Re: 647 cal fixture on ebay
Snort!
toggle quoted message
Show quoted text
Seriously, it's not ham shorthand at all, it's chatroom shorthand, stands for If I Recall Correctly. Other related ones: AFAIK As Far As I Know YMMV Your Mileage May Vary These serve to delineate precisely how much you do *not* know about what you're talking about :) Regards, Dave Wise -----Original Message----- |
|
Re: ligthing gel
Thank you, Craig. That was very smart of me: said 'lighting gel' and then
toggle quoted message
Show quoted text
went on about photographic filters. Regards Miroslav Pokorni ----- Original Message -----
From: "Craig Sawyers" <c.sawyers@...> To: "TekScopes" <TekScopes@...> Sent: Friday, March 05, 2004 1:09 AM Subject: [TekScopes] ligthing gel film,You did mention that lighting gel before, but I still do not besomething to be used to make custom photographic filters. The film must collapsing?very thin, to avoid optical distortions due wavy surface caused inPlease, explain the construction.Lighting gel is the stuff that is used in front of stage lighting in front of Tek scopes for sure - but it would certainly be better than |
|
Re: Bias batteries in 7S14
Michael Dunn
At 12:22 AM +1100 2004/3/6, jeans wrote:
You can download the instruction Manual from TekNet at Thanks! I've added their URL to our Links page. I'd advise any members who haven't checked out that page to do so sometime. Lots of good stuff... Michael |
|
Re: 7S/7T Sampling System
Ashton Brown
Craig, thanks!
toggle quoted message
Show quoted text
+11 Informative.. Your post encapsulates about a dozen questions I've had re refurb of the pure unobtainium stuff. Printed! It's Very nice to know that, with some precise fiddling - many of these can be resurrected. (And thanks to Stan, repeatedly - for supplying the unobtainium Information!) GaAs back with a vengeance, eh? 150 Ghz might get us 5000 Channels - with nothing watchable.. Two ears and a tail - {static-free, of course} Ashton Craig Sawyers wrote: I have read postings about using some fast SchotkyI did this with a defunct S3a 1GHz sampling probe. The brige was toast |
|
Re: 475A filter, protective cap availability?
Robert Morein
Lighting gels are not very thin, because they are mounted in front of
toggle quoted message
Show quoted text
lights, not lenses. The dye is "cast" into the material. ----- Original Message -----
From: "Miroslav Pokorni" <mpokorni2000@...> To: <TekScopes@...>; "Mark Anton" <heightstv@...> Sent: Friday, March 05, 2004 3:07 AM Subject: Re: [TekScopes] 475A filter, protective cap availability? Hello Mark,what is that material and why musical instrument repair shops would have it.mounting. In that case, how you would make a 4 x 6" screen without film collapsing?repair getshop should possibly have some. The only to be careful of is not too fartherone that is too opaque. Then you would have to turn up intensity scopesthan needed to view the trace. I have used gel material on several CRTnow and works well. It isnt just for looks either...the reason it isthereis to provide a higher contrast trace. vs seeing a white background. filter with a nice sharp new one. Ar they commonly available? |
|
Re: Bias batteries in 7S14
jeans
You can download the instruction Manual from TekNet at
toggle quoted message
Show quoted text
<>. You need to sign up but they seem to be OK. Click on the manual panel on the left of their web site and follow the instructions. You can only download 5 manuals per month. The file is large, 25 Mbytes so s fairly complete. Don Black. Michael Dunn wrote: Does anyone have a digitized manual...? |
|
Re: Your document (Public Humiliation)
Ashton Brown
Yes, I'd expect that by now - most Tekscopes readers are aware of the harvesting of e-mail addresses: often via the wide-OPEN access to LookOut and M$ Office -- holes even larger than those in the OS itself. The first target often is: one's address book. This has been going on only since.. version 3.x of this humongous 'application on-top-of DOS' - ergo
Pretty likely, someone with Mr. G's address in *their* book is most apt to be the real source of the nastily tainted message. (Note too that, Yahoo strips off attachments by default) But then, with Dumont grade s/ware in millions of places: who can resist poking it with a blunt object? daveolla wrote: Greetings, Grobbins says not guilty! people always make the front page when accused, and their later innocence buried in the folds of the last pages.-----------------< snip >------------------ |
|
Re: Your document (Public Humiliation)
Greetings, Grobbins says not guilty! people always make the front
page when accused, and their later innocence buried in the folds of the last pages. --- In TekScopes@..., "Howard Matthews" > Grobbins got a virus! Neener, neener, neener! To answer your allegations Mr. Neener -Norton antivirus is updated automatically, often. -Presently no viruses have been found. -No attachements have been opened since Feb 5 ( from one of our members), and it was run thru Norton, it was clean. -I also did not post anything on the site since Feb 4, message 6693. I have noticed that my full email address showed up on the post supposedly sent by me, however, none of my "real posts" have this. Mr. Neener wrote; 1. Did not have antivirus software up-to-date, ANDFor a techie to fall for one of these is embarrassing.OK, I'm sorry...... that as a techie you fell for this, but you need not be embarrassed because this group is meant to help even those that have little understanding, and since when did this "Classic Tube Scopes" group require the computer savey of 11 year olds!! We all must try to ensure our measurements are made properly for any kind of precision. The Real grobbins@n... Daveolla P.S. The real Daveolla certainly would have started his post with a friendly "Greetings", that should have been another clue! P.S.S. hold the presses, front page, above the crease, this just in.............. --- In TekScopes@..., grobbins@n... wrote:Please have a look at the attached file. |
|
ligthing gel
Craig Sawyers
You did mention that lighting gel before, but I still do notLighting gel is the stuff that is used in front of stage lighting in threatres and film sets. It is available in very many colours, in large sheets, and is heat resisting. It is thinner than the plastic sheet used in front of Tek scopes for sure - but it would certainly be better than nothing. Something like this looks about right for the standard blue 7000 series 'scope filter. Craig |
|
Re: Tek C-53 Camera And C50/C70 Film Back
Hello Greyhawk,
toggle quoted message
Show quoted text
What do you need from that manual? It is pretty big and I have a paper copy that would need to scanned, so do not push it. Regards Miroslav Pokorni ----- Original Message -----
From: "greyhawkeng" <greyhawkeng@...> To: <TekScopes@...> Sent: Wednesday, March 03, 2004 1:58 PM Subject: [TekScopes] Tek C-53 Camera And C50/C70 Film Back Can Someone Send Me A .PDF File Of The Operator/Service Manual? |
|
Re: 475A filter, protective cap availability?
Hello Mark,
toggle quoted message
Show quoted text
You did mention that lighting gel before, but I still do not understand what is that material and why musical instrument repair shops would have it. I presume, the material is a gel with dye, deposited on transparent film, something to be used to make custom photographic filters. The film must be very thin, to avoid optical distortions due wavy surface caused by mounting. In that case, how you would make a 4 x 6" screen without film collapsing? Please, explain the construction. Regards Miroslav Pokorni ----- Original Message -----
From: "Mark Anton" <heightstv@...> To: <TekScopes@...> Sent: Thursday, March 04, 2004 5:29 PM Subject: RE: [TekScopes] 475A filter, protective cap availability? well for a screen filter is lighting gel material. You can pick thecolor....use one that is close to the color of the trace. A musical intrument repairthere is to provide a higher contrast trace. vs seeing a white background. |
|
Re: Bias batteries in 7S14
pe1fbo
The 7S14 batteries have a voltage of 1.35 volts, New silver oxide
batteries are about 1.55 volts. You can replace these mercury types safely with silver oxide types in a 7S14. I have done this about a year ago and worked perfectly. Empty or nearly empty batteries showed on mine an increased noise band (mind you they where not complete dead). After replacemend I did a recal on the unit, especially the avalanche voltage, loop gain, DC bal and MEM bal are affecting the noise. Fred de Vries |
|
Re: TEK 2753P Scare
Craig Sawyers
I have no idea what happened, and no ideaIt is both a massive relief and deeply worrying when this sort of thing happens. My 7L5 has got a similar quirk - the spectrum will shoot off 800kHz up the display from the reference dot - and then will come back and jitter around, settle down for a while then - back up to 800kHz. OK - an intermittent fault I hear you say - probably in the PLL. Heh - so far it has defied attempts to find it; seems to obey some qunatum mechanical behaviour: as soon as you offer it violence by trying to fix it, it settles down for a few hours. Until I really want to use it again, that is. But good luck with the 2753P - at least like my 7L5, it isn't *really* bust, just being an awkward SOB. Craig |
|
Re: TEK 2753P Scare
John Miles
I figured the front end had kicked the bucket. I tried theWhy would you assume that? This failure wouldn't have anything to do with the front end. It sounds like a CPU glitch of some sort. The problem's not likely to be gone forever, but not likely to put the analyzer totally out of commission, either. If it happens again, try turning off digital storage and see if that makes a difference. -- john KE5FX |
|
GR on eBay
Craig Sawyers
Here's another piece of early GR stuff I saw on eBay just now - item
3801842023. This is an 804C UHF signal generator. Looks like it is 1940's (it certainly predates the 1956 catalog that I have). Anyway, the seller has this listed for $8 on buy-it-now for anyone interested in this sort of gear. Craig |
to navigate to use esc to dismiss