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Re: 535A stood on its end
On 2008-10-06 10:45 +0100, Craig Sawyers wrote:
Thanks everyone. My 535A has started misbehaving again and I wasHello all. Are there any known problems with using a 535A inOther than cooling (ie ensuring that the fan intake is not wondering if that could be the reason. Maybe it's an intermittent contact in the 1A1 edge connector. I'll have to investigate... -- Andr??? Majorel <URL:> Do not use this account for regular correspondence. See the URL above for contact information. |
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Re: 535A stood on its end
Geoff Blake
On Mon, 6 Oct 2008, Andre Majorel wrote:
Hello all. Are there any known problems with using a 535A inYes, the fan suck dust and fluff from the floor necessitating frequent cleaning of the filter - otherwise no problems that I am aware of. Geoff -- Geoff Blake G8GNZ located near Chelmsford, Essex, U.K. Please reply to: geoff(at)palaemon(dot)demon(dot)co(dot)uk Using Linux on Intel & Linux or NetBSD on Sun Sparc platforms Please avoid sending me Word or PowerPoint attachments. See <> ------------------------------------------------------------------------------ This E-mail and any attachment(s) are strictly confidential and is intended solely for the addressee(s). If you are not the intended recipient please notify <postmaster(at)palaemon.co.uk> and the sender by return and permanently delete the message. You may not disclose, forward or copy this E-mail or any of its attachments to any third party without the prior consent of the sender. ------------------------------------------------------------------------------ |
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Re: Manuals needed for the following scopes
There's the 2246 operator's manual off this fellows page.
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I've never seen the service manual for the 2246 available "free" online anywhere. (Though I wouldn't mind finding one. - If for no other reason to flip through) David On Tue, Oct 7, 2008 at 12:37 PM, Doug hale <Tektronix@...> wrote:
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Re: Manuals needed for the following scopes
Doug hale
thepinkfloyd67 wrote: I am in need of manuals for the following scopes: |
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Re: 535 over blanked?
Dave Casey
Are the measurements accurate for what you see, or is the trace compressed?
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Dave Casey ----- Original Message -----
From: George To: TekScopes@... Sent: Tuesday, October 07, 2008 9:29 AM Subject: [TekScopes] 535 over blanked? Greetings to the groupe, I have a 545 that has two or three graticuls of trace and the rest is blanked. How can I make more graticuls available?? Thanks in advance, George |
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Re: Massachusetts surplus
Scott McGrath
None in MA that I know of
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ESS in Manchester NH (Exit 6 off I-93N) take right off of exit and it's about a 1/2 mile on your left on Candia Road they have a substantial Ebay presence as well and you can pick up your Ebay stuff there and not risk damage in shipping. Store has Electronic parts (new), industrial surplus, racks and power supplies most of the 'good' test gear goes to ebay Peter Gottlieb wrote: Anybody know if there are any decent surplus stores left in MA? Like where they have Tek or HP gear? |
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Re: 2430A CCD and PA fail... bad NVRAM?
Hi,
I hope this post isn't bad new for your but here goes: Make sure you point an external fan at the CCD when running outside the cover. Even 10 minutes of operation with the CCDs being cooled is enough to destry them. I hope you have a 2430A abover serial number B015xxx, anything below that is going to be painful. Also, the usual CCD failure will not really show up until you use REPET mode. You see this on ebay all the time "This scope has CCD failures but I input a signal and it works great!" Yeah, at 1ms/Div. Try a fast signal and using 100ns/Div or faster. --Victor |
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Re: 535A stood on its end
I don¡¯t think the 535A cares what position it is in as long as the air flow
through the fan filter is not restricted. Stan _____ From: TekScopes@... [mailto:TekScopes@...] On Behalf Of Andre Majorel Sent: Monday, October 06, 2008 1:25 AM To: TekScopes@... Subject: [TekScopes] 535A stood on its end Hello all. Are there any known problems with using a 535A in vertical position, i.e. with the fan at the rear looking down and the front panel looking up ? -- Andr¨¦ Majorel <URL:. <> fr/~amajorel/> Do not use this account for regular correspondence. See the URL above for contact information. [Non-text portions of this message have been removed] |
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Re: Obsolete part needed for repair
It is a 5082-3081, currently manufacturer by Avago. It is available in single quantities from Farnell and Mouser.
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Regards, Javier, EA1CRB thepinkfloyd67 escribi???:
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------------------------------------------------------------------------ Javier Herrero EMAIL: jherrero@... HV Sistemas S.L. PHONE: +34 949 336 806 Los Charcones, 17A FAX: +34 949 336 792 19170 El Casar - Guadalajara - Spain WEB: |
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Obsolete part needed for repair
Does anyone know where I can locate the following obsolete part?
HP3081 If not, can you provide me with a data sheet that I can use to find a suitable cross reference? The part is not for a Tektronix Scope, it is a pin diode used in a Advantage Instruments SA1300C Spectrum analyzer that I am repairing. There are 2 diodes in series connected to the input of the spectrum analyzer (both HP3081's). Unfortunately, 1 has blown and I would like to get a few of these in case of future problems. So far the only places I can find them are places that locate obsolete parts like USBID, but they have a $250 minimum order. Does anyone know of a suitable replacement for this? I figured that it was worth a chance asking here, since there are many knowledgeable people here that repair such equipment. |
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Re: 7904 R7903 general impressions
John Griessen
bhaskins@... wrote:
I'm looking for a new toy and am thinking about a 7904 or R7903.If you have more than one lab bench in use, some rack mount scopes can be helpful, even stacked up three high... At one of my two benches, I have a 2230 DSO on the left on an adjustable shelf, plus a rack mount R7903 on the shelf above that, and a 7844RM right on top of it. Below the shelf at the left is a lower than lab bench height desktop with computers on it, and connections from them to the bench flow easily under the scopes. I can't see all the scopes from a sitting position, but I have my lab benches chest high for standing work, and a normal height desktop adjacent. The 7844 is a four slot rackmount shape...about as fast as a 7904 too... John Griessen PS My other bench has a 7904A. |
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Re: TDS540 - replaced caps but beeper stuck on and clock issue?
Hi Stephen,
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? Thanks for the info. ? I'm not sure what Tekronix was thinking with a clock that needs to be reset every time you power up - seems pretty useless to me. ? I'll try cleaning and recapping the front panel next. David. --- On Sun, 10/5/08, Stephen Smith <sjsmith@...> wrote:
From: Stephen Smith <sjsmith@...> Subject: [TekScopes] Re: TDS540 - replaced caps but beeper stuck on and clock issue? To: TekScopes@... Date: Sunday, October 5, 2008, 10:34 PM Hello David, I'm fairly sure that all the original TDS520/540/620/ 640/820 series do not have battery backed real-time clocks. The time is kept in non-volatile memory but not updated while powered down. You need to set the time each time you power up. (I know, I have to do this on my TDS820). The TDS500/600/700 A,B,C and D series had battery backed RTCs. Another issue is that the internal batteries in the non-volatile components are eventually going to fail. They are supposed to have a life of around 10+ years, however I think a lot of these are now well over this. Do you know what the date code is on the DS1245Y-120? As for the piezo beeper, I'm not sure, however it is on the front panel PCB which you haven't done yet... Regards, Stephen. --- In TekScopes@yahoogrou ps.com, David Woodhead <david_woodhead@ ...> wrote: Acquisitions boards in my TDS540 (did not do front panel yet). I also replaced a couple of TL074's that had a bunch of electrolyte underneath them. the I/O cal routine and it calibrated without issue as well. In fact I have checked everything I can think of and it all appears to be working very well except..... correctly. I can set and it runs fine but when I power down and power up again (a few minutes later) it appears that the clock did not continue to run when powered down. It does not default to year ~2002 (build date) - it remembers the time when powered down and picks up where it left off when powered up again! When I press diplay time it tells me that the clock is not updating when powered downand to run the setup utility to set the time. values ok (when powered down). But the clock does not continue to run when powered down and the beeper is stuck on.
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2430A CCD and PA fail... bad NVRAM?
synthmdl76
Hello all... here is the issue.
I bought it on ebay and recieved it and it worked fine. I looked in the help log and it stated 430hrs run time.... yes low, but I dont think it was true. after 2 days I powered it up and got a fail on the ccd during the self test. It was a 7430 /ccd/pd-offset/ch2-1 to be exact. Ran the ext diag and then got a CCD Fail and a PA fail. I let the unit run for a 0.5 hours or so and did a run test (ext diag) till passes during this time and the unit finally passed. turned the unit off (let it cool overnight) and powered it back up today and I got a CKSUM-NVRAM fail with many of the self test(1000-8000) blank (untested). I wound guess theyre blank because the scope did not run these test because it relies on values stored in ram (from what Ive read in this group). I let the scope warm back up for a few minutes, re-ran the ext diag and all passed (including the nvram) but the 7430 CCD/PD-OFFSET/CH2-1 which failed. The 8132 /PA/OFFSET/ENV-SP-SLOW CH2 was failing a bit for the first few minutes but now passes. I have also noticed during the self test the crt display flicker slightly. I wonder if this is normal or if the caps in the power supply may be bad as I guess is common on a unit this age. Now the thing is... even with these errors I can still use the scope, both channels and it seems to work fine. All I use it for is my DIY synthesizer build to see if Im getting signals where I should (nothing precise). My question is I wonder if I have a bad DS1230AB NVRAM (bad battery to be exact) and not a bad CCD and PA that are causing these errors? |
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FS: 310A and 317 scopes
Several years ago I was bitten by the Tekscope bug and eventually
accumulated fourteen different scopes. I finally realized that many of them just sit around looking nice and gathering dust, so would like to sell some. The big 5's just cost too much to ship nowadays so I'm probably stuck with them (I also have a nice 515A I'm not using if anyone's interested). Anyhow the 310A and the 317 are both working (see pics). (I cleaned the storage dust and dirt off them after taking the calibrator trace pics. They aren't rusty). I'll throw in the P6027 (1X probe) that came with the 310A. The 317 is missing the right cabinet panel and I don't have a spare power cord for it. Otherwise complete. Please make reasonable offers ("silent auction") before I put them on that auction place. Shipping on your dime from zip 65775 (US). thanks Charles |
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