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Re: 2445 vs 2465 scopes
All the voltages are referenced to +10v. If this is wrong then all
the others will be as well. So this is a good place to start. Before the PSU fault, did you try adjusting the grid bias to see if it cleared up your display problem? Incorrect grid bias can cause all sorts of strange displays on the screen. [sorry my first reply was sent to your email address instead of the list] --- In TekScopes@..., "oldtestgear" <philip.parsons@...> wrote: The 2465 display was very poor -- looked as if the traceevery plug & socket and checked the PSU voltages (all OK). Afterspending a fair bit of time doing this, the PSU decided to die -- suddenlyall voltages dropped well out of spec.the PSU stopped working, all the main signal paths seemed correct. At |
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Tek 5113 Intensity control
m8jpk
Hello All
i am trying to repair the intensity control cct fpr a tek 5113 spent several days no joy. I am getting the neg pulse all the way to the z axis amps. out put Z Axiz, full amplitude 70V peak on both. Amplitude can be varied using brightness controls but the grids remain at 3.4kv all the time. Checked all cpmponents around the restorer cct all looks and measures ok. What is the function of the neon lamps? Any Help most appreciated. Thanks M8JPK |
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Re: FS: 11A33 (Sold)
Howard Ashcraft
--- In TekScopes@..., "Howard Ashcraft" <hwa@...> wrote:
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Current Tektronix Catalog Product's Overdrive Recovery
Joe Rooney
Folks,
I had an old friend that still sells Tek products in the rep channel call about overdrive recovery specifications of current Tektronix oscilloscopes. He said he could not get an answer, no less an understanding of the inquiry from his Tektronix contacts. He was sitting in the Physics Lab at Bezerkeley with the potential purchaser. I remember the 7A13 as being one of the best for its bandwidth, something like recvoering from a 10 volt overdrive within 1ms at 1mv/ div and spec'd to within 5mv of zero inside 1 microsecond. (I think) Have any of you folks kept abreast of Tektronix products to field an answer? I certainly haven't Thanks, Joe Rooney |
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Re: Data transfer software for Tek 7854 ??
Way back when - before the Internet - Tek ran a BBS system where many
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files were available for download. I kept a listing of those files but I doubt if the BBS is still alive. I think they did move some of the files to an FTP server but I can't seem to find them. One of the files in the listing is a package written in Basic for the 7854. Maybe someone who had a 7854 and downloaded that software still has a copy and could post it to the files area here. --------------------------------------------------------------------- --- In TekScopes@..., "Ray Johnson" <johnsorj666@...>
wrote: "...Has anyone found (or created) a simple GPIB data dump application for the Tek 7854 scope? ..." |
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Re: Data transfer software for Tek 7854 ??
Dave Casey
I haven't crossed this bridge, as I don't have a GPIB card in my computer yet, but there is a lot of GPIB specific application information dealing with the 7854, which I think includes specifications of all the commands, regardless of whether they became standard or were specific to the 7854. So hopefully interfacing to the full capability of the hardware is still possible.
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Dave Casey ----- Original Message -----
From: Joe Rooney To: TekScopes@... Sent: Wednesday, September 17, 2008 3:31 PM Subject: [TekScopes] Re: Data transfer software for Tek 7854 ?? --- In TekScopes@..., "Ray Johnson" <johnsorj666@...> wrote: > > Hi All > > Has anyone found (or created) a simple GPIB data dump application > for the Tek 7854 scope? What I have in mind is to dump captured > waveforms from the 7854 into a PC through a NI GPIB card then > import the text data into Excel where I can clean up the plot--My > ultimate goal is to have a VBA ap which will do this transfer directly > but intermediate steps/ software is OK for now. > > Any solutions are appreciated > > Ray in Minnesota Hi Ray, Tektronix was in on the development of the refinement of HPIB to GPIB and the 7854 was one of the earliest Test and Measurement Products. It was preceded by several portables, a modified 465 analog (I think) and the 468. None of these early GPIB products conformed to the later "packaged" codes one could use to retrieve volts/div settings, sweep speeds and that is why it is likely not on any particular thrid party list of supported products. The device dependent codes were all over the map, but the basic supervisory commands should still work. Tek sold various GPIB buss monitoring products, maybe you could get your hands on one of them if the dip switch seems healthy. Joe Rooney |
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Re: Data transfer software for Tek 7854 ??
Joe Rooney
--- In TekScopes@..., "Ray Johnson" <johnsorj666@...>
wrote: directly but intermediate steps/ software is OK for now.Hi Ray, Tektronix was in on the development of the refinement of HPIB to GPIB and the 7854 was one of the earliest Test and Measurement Products. It was preceded by several portables, a modified 465 analog (I think) and the 468. None of these early GPIB products conformed to the later "packaged" codes one could use to retrieve volts/div settings, sweep speeds and that is why it is likely not on any particular thrid party list of supported products. The device dependent codes were all over the map, but the basic supervisory commands should still work. Tek sold various GPIB buss monitoring products, maybe you could get your hands on one of them if the dip switch seems healthy. Joe Rooney |
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Re: Data transfer software for Tek 7854 ??
monettsys
--- In TekScopes@..., "Jose V. Gavila" <eb5agv@.>
wrote: > Hello Mike, >> PS - Sorry, Ray. I hit the Send button too fast, and you got a >> duplicate reply. The Yahoo TekScopes group is the only one I know >> of that defaults to sending the reply to the OP. You have to >> select the Yahoo group before clicking the Send button. This is a >> pain, and it's hard to remember since none of the other forums I >> subscribe to have this problem. >> Does anyone know if it's possible to change the default? > Yes, but it must be done by the Administrator (I know as I manage > 11 Yahoogroups and have all configured tha way you prefer) > Regards, > JOSE > ------------------------------------------------------------------ ---- > 73 EB5AGV / EC5AAU - JOSE V. GAVILA > La Canyada - Valencia (SPAIN) - Loc: IM99SM > Vintage Radio and Test Equipment: > European Boatanchors List: euro_ba_swap > Amateur Repairs List: repairs Hi Jose, Thanks for the info. I sent him a short note, so let's see what happens. Interesting SIG. I'll have to check your links! Regards, Mike Monett |
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Re: Data transfer software for Tek 7854 ??
Jose V. Gavila
Hello Mike,
PS - Sorry, Ray. I hit the Send button too fast, and you got aYes, but it must be done by the Administrator (I know as I manage 11 Yahoogroups and have all configured tha way you prefer) Regards, JOSE ---------------------------------------------------------------------- 73 EB5AGV / EC5AAU - JOSE V. GAVILA La Canyada - Valencia (SPAIN) - Loc: IM99SM Vintage Radio and Test Equipment: European Boatanchors List: Amateur Repairs List: |
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Re: Data transfer software for Tek 7854 ??
monettsys
--- In TekScopes@..., "Ray Johnson" <johnsorj666@...>
wrote: directly but intermediate steps/ software is OK for now.I did this many years ago for my 7854. I don't have the code now, but I seem to recall the program was very simple and straightforward. However, there was one problem. The data transfer was extremely, painfully slow. Other instruments on the same GPIB interface ran much faster, so I concluded it was the scope. Maybe others had better performance, but for me, the 7854 was so slow I decided it wasn't worth it. Perhaps later models may be faster, or hopefully you might be lucky and find it suitable for your needs. Best Regards, Mike Monett PS - Sorry, Ray. I hit the Send button too fast, and you got a duplicate reply. The Yahoo TekScopes group is the only one I know of that defaults to sending the reply to the OP. You have to select the Yahoo group before clicking the Send button. This is a pain, and it's hard to remember since none of the other forums I subscribe to have this problem. Does anyone know if it's possible to change the default? |
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Re: Data transfer software for Tek 7854 ??
Tomas
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-----Original Message-----H?kan Hinze, here in tekscopes has created a small app that reads the 7D20. Havent tested it on the 7854 yet, but both use ascii to transfer. However, the 7854 is not listed though With best regards Tomas Larsson TL Engineering & Consultants Engelbrektsgatan 121 SE 506 39 Bor?s Sweden +46 739 932 673 Verus Amicus Est Tamquam Alter Idem -----BEGIN PGP PUBLIC KEY BLOCK----- Version: GnuPG v1.4.7 (MingW32) mQGiBEhFpFgRBADVkG89wwwJOYAoMjRsgyhcm5W3winq7oVew4skWbZD5AUlfDdw iAaoM8pIXChnXWw38skNBh7NdMP73JyemoIrcCfa9qQg45FGTxo/Is97iD67s4nQ VEmjpuqpTT86hiymLWrLZ4mxDi7rjyYpEzMaV22WVkGUe+CHGuS3qgL5/wCg6Ru3 Y0Pnlp4rQVSRg180w2QwHEUEAK146rdM9d5cILPlo44vSlyuFAIv6rWeF6aC0U1h lt4AF8hWeYghXzcN5mgJgEtT5ll5FdqVwgmKTMfmVuo76Q3Rwk37NvizPmS3jSDe bsnS0KltYqZ4CZ8KKtHqOZYGmiVgxVkI3WtMqaKUju6va60aRcehN2fT2L5qXaE3 pOWxA/4gLT3tjxf7HmSCtb1+G4FTpRQ9zWxkmDV0qC4RhzcHlj9F14o7SpXMndnJ F0oCplnjhW4bMGOvMZFGw//v36dCz2vSE4KE7oj7rhCqFun8rklRdwNYFDW2yIHy FHzM6SvlLBB8DhXOIEq2PXnGy8YnOCFf1gQu1JChB2EroXQGxbQjVG9tYXMgTGFy c3NvbiBIZW1tYSA8dG9tYXNAdGxlYy5zZT6IYAQTEQIAIAUCSEWkWAIbIwYLCQgH AwIEFQIIAwQWAgMBAh4BAheAAAoJEM8L+xprH7d5qJsAn2dUdOzU5fAOF0oUpBp9 ytNJXkVcAKDhXRQkciHSJEop87WodUN3fM2OjbkBDQRIRaRYEAQAo/lRwYLEupsl h86TW1oWM4XFuh/LjIus7tBZBMRuEeiv71HIsK2yJKPu+dc09tSNshX9gmPN1bXN jhPZwO8PgbeAqgnerOKgysMQofsmywoEXmCDIsTDxw1JfGj4dy1gR9wDStzcMPAG 8Gy4kntctEMCrMgDSM9jp1ZWPYvGA4MAAwYD/2W/h4zNbVWb/X9560wR/hNimPml qi6jSC/TiSG8KIuE5Vw8IdgX3vNNvEF7bTxcRokngIb9+FlMIebaM23CMEkbZB53 XwKvy9OqldjMDKKBVzD5IznqiS3uOkQI8UyGzzLY2FHL/azRtpTYy0hlGW7Lqa2+ XbBgQi9BN2UPhF8HiEkEGBECAAkFAkhFpFgCGwwACgkQzwv7Gmsft3mj3QCgwYZD FJc9zt88euTsWwnjz0jowVoAn0+nWG4RE84G2zyP1d2WLP4z7HRp =mM3w -----END PGP PUBLIC KEY BLOCK----- |
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Data transfer software for Tek 7854 ??
Hi All
Has anyone found (or created) a simple GPIB data dump application for the Tek 7854 scope? What I have in mind is to dump captured waveforms from the 7854 into a PC through a NI GPIB card then import the text data into Excel where I can clean up the plot--My ultimate goal is to have a VBA ap which will do this transfer directly but intermediate steps/ software is OK for now. Any solutions are appreciated Ray in Minnesota |
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Re: Retubing 545 line amplifiers
Paul Kraemer
When I try to go there I get message from Fox web service about no channels---what is that about
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paul ----- Original Message -----
From: cim To: Stan & Patricia Griffiths Cc: TekScopes Sent: Tuesday, September 16, 2008 2:04 PM Subject: [TekScopes] Retubing 545 line amplifiers If any of you are thinking of replacing all of the vertical amp tubes (takes quantity 14 as I remember) in you 545 etc. scopes, Antique Electric has the 8136 at a great price right now: 8136 - PENTODE, SHARP CUTOFF Sale Priced - 75% off list! 2.50 $0.62 Qty |
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Re: AARGHH, Isn't it typical.
Dave Casey
As I recall from reading up on this, the fan is not temperature controlled but a burshless DC design running at a constant RPM. I could be mistaken, but I don't remember anything in the manual discussing temperature control.
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I think Walter at Sphere might have one, but shipping to the EU might be pricey. I was fortunate in that while my 7854 had been dropped, I knew this ahead of time and after reforming the rear panel, the fan works properly. Dave Casey ----- Original Message -----
From: Tomas To: TekScopes@... Sent: Tuesday, September 16, 2008 2:00 PM Subject: [TekScopes] AARGHH, Isn't it typical. Hi group. Got my 7854 yeasterday, and guess what the f...g transportation company did. The back of the scope is smashed, with the sheet of metal with the Fan output and the connectors completly pressed to the main chassis. It will need quite a lot of force to bend this. Now, what is broken, well the metal partsa can be re-bent back to proper shape. I cant see any damage to the electronics. The scope starts up, and I finally managed to get a trace (need to read the OM thoroughly, it is a complicated beast, as it seems.) BUT the fan-blades are completly crushed, so either I need to get hold of new fanblades, or, do some surgery and replace the existing fan with a computertype of fan. That however will force me to create some sort of new fan-speed/temperature controller. Thinking of using a controller designed for computers. Is this doable, and how large needs the fan to be (cfm or m3/h). I vagely remember seeing something about this somewhere on the net. With best regards Tomas Larsson TL Engineering & Consultants Engelbrektsgatan 121 SE 506 39 Bor?s Sweden +46 739 932 673 Verus Amicus Est Tamquam Alter Idem -----BEGIN PGP PUBLIC KEY BLOCK----- Version: GnuPG v1.4.7 (MingW32) mQGiBEhFpFgRBADVkG89wwwJOYAoMjRsgyhcm5W3winq7oVew4skWbZD5AUlfDdw iAaoM8pIXChnXWw38skNBh7NdMP73JyemoIrcCfa9qQg45FGTxo/Is97iD67s4nQ VEmjpuqpTT86hiymLWrLZ4mxDi7rjyYpEzMaV22WVkGUe+CHGuS3qgL5/wCg6Ru3 Y0Pnlp4rQVSRg180w2QwHEUEAK146rdM9d5cILPlo44vSlyuFAIv6rWeF6aC0U1h lt4AF8hWeYghXzcN5mgJgEtT5ll5FdqVwgmKTMfmVuo76Q3Rwk37NvizPmS3jSDe bsnS0KltYqZ4CZ8KKtHqOZYGmiVgxVkI3WtMqaKUju6va60aRcehN2fT2L5qXaE3 pOWxA/4gLT3tjxf7HmSCtb1+G4FTpRQ9zWxkmDV0qC4RhzcHlj9F14o7SpXMndnJ F0oCplnjhW4bMGOvMZFGw//v36dCz2vSE4KE7oj7rhCqFun8rklRdwNYFDW2yIHy FHzM6SvlLBB8DhXOIEq2PXnGy8YnOCFf1gQu1JChB2EroXQGxbQjVG9tYXMgTGFy c3NvbiBIZW1tYSA8dG9tYXNAdGxlYy5zZT6IYAQTEQIAIAUCSEWkWAIbIwYLCQgH AwIEFQIIAwQWAgMBAh4BAheAAAoJEM8L+xprH7d5qJsAn2dUdOzU5fAOF0oUpBp9 ytNJXkVcAKDhXRQkciHSJEop87WodUN3fM2OjbkBDQRIRaRYEAQAo/lRwYLEupsl h86TW1oWM4XFuh/LjIus7tBZBMRuEeiv71HIsK2yJKPu+dc09tSNshX9gmPN1bXN jhPZwO8PgbeAqgnerOKgysMQofsmywoEXmCDIsTDxw1JfGj4dy1gR9wDStzcMPAG 8Gy4kntctEMCrMgDSM9jp1ZWPYvGA4MAAwYD/2W/h4zNbVWb/X9560wR/hNimPml qi6jSC/TiSG8KIuE5Vw8IdgX3vNNvEF7bTxcRokngIb9+FlMIebaM23CMEkbZB53 XwKvy9OqldjMDKKBVzD5IznqiS3uOkQI8UyGzzLY2FHL/azRtpTYy0hlGW7Lqa2+ XbBgQi9BN2UPhF8HiEkEGBECAAkFAkhFpFgCGwwACgkQzwv7Gmsft3mj3QCgwYZD FJc9zt88euTsWwnjz0jowVoAn0+nWG4RE84G2zyP1d2WLP4z7HRp =mM3w -----END PGP PUBLIC KEY BLOCK----- |
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AARGHH, Isn't it typical.
Tomas
Hi group.
Got my 7854 yeasterday, and guess what the f...g transportation company did. The back of the scope is smashed, with the sheet of metal with the Fan output and the connectors completly pressed to the main chassis. It will need quite a lot of force to bend this. Now, what is broken, well the metal partsa can be re-bent back to proper shape. I cant see any damage to the electronics. The scope starts up, and I finally managed to get a trace (need to read the OM thoroughly, it is a complicated beast, as it seems.) BUT the fan-blades are completly crushed, so either I need to get hold of new fanblades, or, do some surgery and replace the existing fan with a computertype of fan. That however will force me to create some sort of new fan-speed/temperature controller. Thinking of using a controller designed for computers. Is this doable, and how large needs the fan to be (cfm or m3/h). I vagely remember seeing something about this somewhere on the net. With best regards Tomas Larsson TL Engineering & Consultants Engelbrektsgatan 121 SE 506 39 Bor?s Sweden +46 739 932 673 Verus Amicus Est Tamquam Alter Idem -----BEGIN PGP PUBLIC KEY BLOCK----- Version: GnuPG v1.4.7 (MingW32) mQGiBEhFpFgRBADVkG89wwwJOYAoMjRsgyhcm5W3winq7oVew4skWbZD5AUlfDdw iAaoM8pIXChnXWw38skNBh7NdMP73JyemoIrcCfa9qQg45FGTxo/Is97iD67s4nQ VEmjpuqpTT86hiymLWrLZ4mxDi7rjyYpEzMaV22WVkGUe+CHGuS3qgL5/wCg6Ru3 Y0Pnlp4rQVSRg180w2QwHEUEAK146rdM9d5cILPlo44vSlyuFAIv6rWeF6aC0U1h lt4AF8hWeYghXzcN5mgJgEtT5ll5FdqVwgmKTMfmVuo76Q3Rwk37NvizPmS3jSDe bsnS0KltYqZ4CZ8KKtHqOZYGmiVgxVkI3WtMqaKUju6va60aRcehN2fT2L5qXaE3 pOWxA/4gLT3tjxf7HmSCtb1+G4FTpRQ9zWxkmDV0qC4RhzcHlj9F14o7SpXMndnJ F0oCplnjhW4bMGOvMZFGw//v36dCz2vSE4KE7oj7rhCqFun8rklRdwNYFDW2yIHy FHzM6SvlLBB8DhXOIEq2PXnGy8YnOCFf1gQu1JChB2EroXQGxbQjVG9tYXMgTGFy c3NvbiBIZW1tYSA8dG9tYXNAdGxlYy5zZT6IYAQTEQIAIAUCSEWkWAIbIwYLCQgH AwIEFQIIAwQWAgMBAh4BAheAAAoJEM8L+xprH7d5qJsAn2dUdOzU5fAOF0oUpBp9 ytNJXkVcAKDhXRQkciHSJEop87WodUN3fM2OjbkBDQRIRaRYEAQAo/lRwYLEupsl h86TW1oWM4XFuh/LjIus7tBZBMRuEeiv71HIsK2yJKPu+dc09tSNshX9gmPN1bXN jhPZwO8PgbeAqgnerOKgysMQofsmywoEXmCDIsTDxw1JfGj4dy1gR9wDStzcMPAG 8Gy4kntctEMCrMgDSM9jp1ZWPYvGA4MAAwYD/2W/h4zNbVWb/X9560wR/hNimPml qi6jSC/TiSG8KIuE5Vw8IdgX3vNNvEF7bTxcRokngIb9+FlMIebaM23CMEkbZB53 XwKvy9OqldjMDKKBVzD5IznqiS3uOkQI8UyGzzLY2FHL/azRtpTYy0hlGW7Lqa2+ XbBgQi9BN2UPhF8HiEkEGBECAAkFAkhFpFgCGwwACgkQzwv7Gmsft3mj3QCgwYZD FJc9zt88euTsWwnjz0jowVoAn0+nWG4RE84G2zyP1d2WLP4z7HRp =mM3w -----END PGP PUBLIC KEY BLOCK----- |
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Re: Looking for leveling head for SG5030
Jim Popwell
try Deane
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I think he has a few left jim ----- Original Message -----
From: Howard Ashcraft To: TekScopes@... Sent: Tuesday, September 16, 2008 9:59 AM Subject: [TekScopes] Looking for leveling head for SG5030 The good news is that I fixed my SG5030. The bad news is that I'm looking for a leveling head. Does anyone have or no of one that is for sale? Howard |
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