HV transformer for tek 453A needed
hello. I watch for a hv transformer for a tektronix 453A part number 120-0471-00 shipping to Argentina. Have a good day!! Ariel
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Re: Tektronix 6 Unit Power Supply
On 7 Jan 2013 at 15:52, TekScopes@... wrote: ______________________________________________________________________
Tektronix 6 Unit Power Supply
Posted by: "g_kupka" ghm1@... g_kupka
Date: Mon Jan 7, 2013 5:10 am ((PST))
Who knows this Tektronix 6 Unit Power Supply, which is offered at Ebay
item: 160951091504 ? Lists OK on ebay.co.uk.. Here is the google translation of the more relevant German text description. <Quote> Offered Tektronix Power Supply for 6 bays of the 7000 series Unfortunately I have no idea of what this Z mainframe weck ever built. I llte where to testing for my 7000 S erie use. There would, however, first be thoroughly overhauled m¨¹ssen.Und this I always put off wi eder. Now I offer it here on Ebay. The mainframe is located in a moderate Z uStand and must be overhauled. The capacitors are partially defective and have "bellies". To throw away, I was too good. So here for te B Astler be gracious and 7000 he freaks. So are sold specifically as defective to hobbyists. <UnQuote> No affiliation etc and so on... Dave B.
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how boring life would be if one knew everything about everything. the
discovery experience is to be prized and encouraged. this forum scores
pretty highly in that regard. being helped and being able to help is a win win. can't do one without the other.
phil Absolutely. Sometimes it takes your breath away. Maybe 8 years ago I purchased a 7854, and in trace acquisition it just ran and ran, never finishing. Looked like a really tricky problem so I asked the list. "Aha - sounds like the horizontal sampling bridge!" says one of the list members - whereupon to validate his instant diagnosis, he tore into his own 7854 and disconnected one of the sampling bridge leads. He was absolutely correct. Four HP schottky barrier diodes later the scope sprang to life. Craig
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how boring life would be if one knew everything about everything. the discovery experience is to be prized and encouraged. this forum scores pretty highly in that regard. being helped and being able to help is a win win. can't do one without the other.
phil
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Show quoted text
--- In TekScopes@..., Dave C wrote:
Matt,
"Dumb" is not the word; "inexperienced" or "ignorant" (ie, lacking the specific knowledge) is something we all are in the beginning. Then we take it apart and we become experts!
Dave
(once ignorant of all things 2465, now somewhat experienced...)
-=-=-=-
A grateful thank you to all who took the time to read and answer my newbie questions about the 454/475 selection and the differences in the 465 and 465B. Hopefully I will now be a little less dumb!! Thanks again.
Matt
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Tim McClain sent a set of 3d printed, ABS plastic rear feet for my 465 scope. He even includes mounting screws. Fits like a glove and works as well or better than the originals. Highly recommend! Thanks Tim.
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Re: Tektronix 6 Unit Power Supply - 2601 version?
I found some information about the 2600 series in the 1974 Tektronix catalog page 246-251.
Gerhard
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Show quoted text
--- In TekScopes@..., Jim Reese wrote:
Barrytech shows a 2601 6 slot frame. The 26xx plugs are really mechanically close to the 7K series. It says you can use 26xx plug in a 7K mainframe with an adapter.
?
Will have to find my 1973 catalog and look up the 26xx series.
?
Jim
--- On Mon, 1/7/13, David C. Partridge wrote:
From: David C. Partridge
Subject: RE: [TekScopes] Re: Tektronix 6 Unit Power Supply - 2601 version?
To: TekScopes@...
Date: Monday, January 7, 2013, 10:45 AM
Could indeed be for 2600 series ... Maybe the vendor is wrong about it being for 7000 series
Dave
------------------------------------
Yahoo! Groups Links
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Re: Tektronix 6 Unit Power Supply - 2601 version?
Barrytech shows a 2601 6 slot frame. The 26xx plugs are really mechanically close to the 7K series. It says you can use 26xx plug in a 7K mainframe with an adapter.
?
Will have to find my 1973 catalog and look up the 26xx series.
?
Jim
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--- On Mon, 1/7/13, David C. Partridge wrote:
From: David C. Partridge Subject: RE: [TekScopes] Re: Tektronix 6 Unit Power Supply - 2601 version?
To: TekScopes@...
Date: Monday, January 7, 2013, 10:45 AM
Could indeed be for 2600 series ... Maybe the vendor is wrong about it being for 7000 series
Dave
------------------------------------
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Re: Tektronix 6 Unit Power Supply - 2601 version?
Could indeed be for 2600 series ... Maybe the vendor is wrong about it being for 7000 series
Dave
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Re: Tektronix 6 Unit Power Supply - 2601 version?
This looks like a version of the 2600/2601 mainframe for the Tek 26xx plugs.
?
More digging to do!
?
Jim
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--- On Mon, 1/7/13, g_kupka wrote:
From: g_kupka
Subject: [TekScopes] Re: Tektronix 6 Unit Power Supply
To: TekScopes@...
Date: Monday, January 7, 2013, 8:50 AM
Hi Mark, Hi Dave
I can't understand the item is present.
Please try this link:
Gerhard
--- In , Artekmedia? wrote:
>
> Gerhard
>
> What ever it was they? just took it down...???/
>
> Dave
>
>
> On 1/7/2013 7:10 AM, g_kupka wrote:
> >
> > Who knows this Tektronix 6 Unit Power Supply, which is offered at Ebay
> > item: 160951091504 ?
> >
> >
>
> --
> Dave
Henderson
> Manuals@...
> www.Artekmanuals.com
> PO Box 175
> Welch,MN 55089
> 651-269-4265
>
------------------------------------
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<*> To visit your group on the web, go to:
? ?
<*> Your email settings:
? ? Individual Email | Traditional
<*> To change settings online go to:
? ?
? ? (Yahoo! ID required)
<*> To change settings via email:
? ?
? ?
<*> To unsubscribe from this group, send an email to:
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<*> Your use of Yahoo! Groups is subject to:
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Need help on TEK 2445 calibration
Help.
Repaired one of my 2445's.? Need to go through Calibration.
Went through it other times in past but don't remember this.
My calibrator sq wave is not 0.4 usec wide ... it is 0.2 usec
wide.
It is not 500 mV as stated in the calibrations procedures in three
of my manuals, including 2445A/2455A manual.
It is 200 mV.
By the way, one of my other 2445's is exactly the same as the
repaired one.?? My third one is in pieces so can't check it.
SO.... calibrating to the wrong level??????? How do I change it if
it is wrong?? Or in Cal 1, do I just hit Coupling UP and go on??
Any help here??
Thanks,
Bob
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Re: Tektronix 6 Unit Power Supply
I's not TM506/TM5006 related because it is a PSU for 7000 series plug-ins as far as I can tell by looking at the pictures and reading the text.
Dave
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Re: RM503 Troubleshooting tips needed for beginner
I wonder if capacitors C611 and/or C612 being open could cause spurious oscillation in V620 leading to all kinds of weird readings from the +500 volt DC supply. Diodes D611 and D612 might even rectify it to produce more then 500 volts. On Mon, 07 Jan 2013 11:38:49 -0000, "Albert" <aodiversen@...> wrote: Hi Ken,
The oscillator circuit is not a kind of Baron von M¨¹nchhausen. No way that leakage from the HV side could pull the primary input voltage continuously to a higher voltage than the unloaded +500V. Like suggested before your DMM might pick up and respond to AC components. I would first of all measure that unloaded +500V, that is with V620 and V634 removed. Also check the RC-decaytime after switching off the power; should be about 20 s. As a crude check on ESR, measure the voltage drop in +500V when you short R626|C628 to ground (13 mA / 7 W load, while R626 is 8 W). Should be just a few volts I think. C628 is rated for 500 V and has to block the unloaded +500V during warming-up. But if you want safer measurements you might temporarily wire the 'scope for 230 V operation.
The heaters of V692, V334 and V434 don't glow enough since these these are fed by the too low secondary output of T620.
I guess the measured too high voltage at V659 means that this tube is not yet ignited.
Albert
--- In TekScopes@..., "whippletreefarms" wrote:
My meter has a DC 1000V range, but I have seen readings today go up to 1900V. I think I figured that the sparking during measurement was due to my bouncing fingertips when approaching the junction to be tested. I switched to alligator probes that I connected before turning power on, and haven't had any sparking or blown fuses since.
This evening's measurements:
* D611 and D612 get warm, but not hot.
* After I lifted the blue T620 primary lead, I measured infinite resistance to ground.
* The +500V rail immediately goes to +1100, +1900V, then beyond range, when power is switched on. The voltage stays high for a long time after power is shut off.
* When I disconnected the 3kV wire from the end of the diode tube, the +500V rail swung back and forth from +420V to 550V.
Don't worry, I won't work on this anymore tonight - I have to tune up my bicycle for the commute in to work tomorrow...
Thanks again, Dan et al.
- Ken
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Hi,
I am looking for 2 single wide Tektronix 7K plugin frames. I do not need the pcb but will need all the frame parts with the rear bracket and locking parts. Side panels are not required. I also need 2 6pdt switches with push on-push off. They must have at least 2 amp per contact rating and be less than 1 inch wide. Panel mount is desirable. Please contact off-list. I can send a double wide frame if wanted.
Jerry Massengale
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Re: RM503 Troubleshooting tips needed for beginner
From: whippletreefarms To: TekScopes@...
Sent: Monday, January 7, 2013 12:58 AM
Subject: [TekScopes] Re: RM503 Troubleshooting tips needed for beginner
?
? ? ?My meter has a DC 1000V range, but I have seen readings today go up to 1900V. I think I figured that the sparking during measurement was due to my bouncing fingertips when approaching the?junction to be tested. I switched to alligator probes that I connected before turning power on, and haven't had any sparking or blown fuses since.
? ? ?This evening's measurements:
? ? ?* D611 and D612 get warm, but not hot.
? ? ?* After I lifted the blue T620 primary lead, I measured infinite resistance to ground.
? ? ?* The +500V rail immediately goes to +1100, +1900V, then beyond range, when power is switched on. The voltage stays high for a long time after power is shut off. QUESTION: ?Is this *immediately*, before V620 has had a chance to warm up? ? It should not read that high.?
? ? ?* When I disconnected the 3kV wire from the end of the diode tube, the +500V rail swung back and forth from +420V to 550V.
This is puzzling, but I now see a problem with my earlier logic about the 3KV leaking to the 500V side. ?It's MINUS 3KV.
I think we need to know that your voltmeter is working properly and that we trust it. ?
At least the T620 resistances you reported earlier are reasonably consistent. ?I expect the low ohms readings to be off. ?Mine were measured with a 2-terminal meter and may just as well be low. ?The point is the resistance values are roughly proportional to the number of turns in the secondary coil of T620 and the 200 Ohms is close to nominal. ? T620 may be
ok. ?
? Try removing V620. ?The 500V rail should read 2x 190V RMS / 0.707 = 537V or so. ?D611 and D612 double the peak voltage on the T601 secondary coil which shows 190V RMS on the schematic. ?If you get much more than this, suspect the meter. ?As pointed out, the voltage should decay with a time constant determined by C611/612 and R611/612, ?so should fall by about 1/3 in 19 seconds. ?The measured resistance of the primary of T621 to ground is correct at about 300 Kohms so we know R611/612 are good. ? The decay time constant are a rough measure of C611/C612.
While you are at it, make sure you have disconnected the -3KV from the CRT filament winding, NOT from the CRT cathode. ?Then measure the CRT filament winding resistance to ground on a high-ohms scale (T601 pins 6, 9). ??
? Resistance of the -3KV line to ground, just as a double-check, should be about 4 MegOhms.
Dan
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Re: Tektronix 6 Unit Power Supply
OK, I see it now, it is only on the German Evil-bay site, not
internationally
Looks like a "home modified" TM506 or TM5006. However the location
of the "cans" for the elctrolytics do not match TM506, TM506A,
TM5006 OR TM5006A? diagrams that I have?
Dave
ArtekManuals
On 1/7/2013 7:46 AM, larrys@... wrote:
?
Artekmedia manuals@...>
wrote:
> Gerhard
>
> What ever it was they just took it down...???/
Plug that item unmber into
-ls-
--
Dave Henderson
Manuals@...
PO Box 175
Welch,MN 55089
651-269-4265
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Re: Tektronix 6 Unit Power Supply
I believe the issue is that ebay USA and ebay Germany don't share with each other -- so an item number on one site doesn't show up on the other.
Stupid, IMHO, but ebay's been doing a lot of stupid things lately.
73 Jim N6OTQ
From: g_kupka
To: TekScopes@...
Sent: Monday, January 7, 2013 7:50 AM
Subject: [TekScopes] Re: Tektronix 6 Unit Power
Supply
Hi Mark, Hi Dave I can't understand the item is present. Please try this link: Gerhard --- In TekScopes@..., Artekmedia? wrote: > > Gerhard > > What ever it was they? just took it down...???/ > > Dave > > > On 1/7/2013 7:10 AM, g_kupka wrote: > > > > Who knows this Tektronix 6 Unit Power Supply, which is offered at Ebay > > item: 160951091504 ? > > > > > > -- > Dave Henderson > Manuals@... >
www.Artekmanuals.com > PO Box 175 > Welch,MN 55089 > 651-269-4265 > ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: ? ? <*> Your email settings: ? ? Individual Email | Traditional <*> To change settings online go to: ? ? ? ? (Yahoo! ID required) <*> To change settings via email: ? ? TekScopes-digest@... ? ? TekScopes-fullfeatured@...<*> To unsubscribe from this group, send an email to: ? ? TekScopes-unsubscribe@...<*> Your use of Yahoo! Groups is subject to: ? ?
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Re: Tektronix 6 Unit Power Supply
Hi Mark, Hi Dave
I can't understand the item is present.
Please try this link:
Gerhard
toggle quoted message
Show quoted text
--- In TekScopes@..., Artekmedia wrote:
Gerhard
What ever it was they just took it down...???/
Dave
On 1/7/2013 7:10 AM, g_kupka wrote:
Who knows this Tektronix 6 Unit Power Supply, which is offered at Ebay
item: 160951091504 ?
--
Dave Henderson
Manuals@...
www.Artekmanuals.com
PO Box 175
Welch,MN 55089
651-269-4265
|
Re: Tektronix 6 Unit Power Supply
Artekmedia <manuals@...> wrote: Gerhard
What ever it was they just took it down...???/ Plug that item unmber into www.ebay.de -ls-
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Re: Tektronix 6 Unit Power Supply
Gerhard
What ever it was they? just took it down...???/
Dave
On 1/7/2013 7:10 AM, g_kupka wrote:
?
Who knows this Tektronix 6 Unit Power Supply, which is
offered at Ebay
item: 160951091504 ?
--
Dave Henderson
Manuals@...
PO Box 175
Welch,MN 55089
651-269-4265
|
Re: Tektronix 6 Unit Power Supply
On 01/07/2013 08:10 AM, g_kupka wrote: Who knows this Tektronix 6 Unit Power Supply, which is offered at Ebay
item: 160951091504 ? Doing a search on that item number, Ebay says it's either been removed or it's not available. Is it missing a number or two? Mark
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David C. Partridge
David Hess