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Hi Michael, I'm afraid you are right. There are scammers everywhere. When I see words like "I don't know how to use it", I assume its broken and bid accordingly. I sell a LOT of stuff on eBay, some

mtmpsmp@... wrote:

Is anyone else suspicious of some of the auctions on eBay. In one auction, the seller says he doesn't know how to use it, so therefore can't guarantee it (a 5L14 analyzer), yet has pictures of it

Hi all, :) Not exactly a TekSCOPE, and not catastrophic, but I have a DM501A with a VERY bright LED display. A glance at the cct diagram does not suggest (to me) the possibility of adding a simple

on voltage CRT. unbalance is centered ..................................................................

STunwall@... wrote:

mtmpsmp@... wrote: Boy! I don't understand that either. I have to wonder if the voltage unbalance is actually getting to the deflection plates inside the CRT. Perhaps there is a broken

I have a 454 that has no vertical deflection on ch1 or ch2, using another scope I am able to trace signal from the preamps to the deflection plates. The sweep appears to be in good shape and the

--- Im TekScopes@e..., msfix56@y... schrieb: the which Have you tried to clean the connector pins of the Nuv? Maybe the heater has a bad contact that could make unstable and weak conditions. The

An update. I spent two hours in dismounting the vboard and un removing the pots from it. What a nightmare! If any other people is about to start an adventure like this, please be sure to have a

wrote: now resistors switches. Hi Emanuele, You can safely desolder the two resistors. They are connected to the input FET. Just make sure that your solderingiron ground is on the same potential

Referring to my other post "tek 475 vertical position pots", I am now required to dismount those pots. To do it (the one for channel 2 in particular), I have to remove the vertical amplifiers

I confirm: "the pots are Allen Bradly, and have a double section"; one section seems unused (not connected). I confirm: they are "the ones which you can nicely open with four screws". So your tips

wrote: Hi Emanuele, Those pots are probable Allen Bradly, and and have a double section. There are two type of AB pots, The plastic sealed ones, and the ones which you can nicely open with four

Surely any owner of "classic" equipment should have a can of good contact cleaner always at hand!!! :-) Perhaps even WD40 would work??? If the pot is just supplying a DC voltage, I guess you

Vertical position pots on my tek475 are so noisy to make my scope almost unusable. Any suggestion on refurbishing those pots? They are two sections pots, can I try to use the unused section? Any

Michael, I visited the site for you but unfortunately the 564 is not on that site (also the one I was looking for the type 468 was not there) Several others were. kind regards, Andre Roest

Michael, I could download all the pdf files in holland. Perhaps I can help you by sending you what is put there. Can you give me a number you are looking for. Kind regards, Andre Roest

maybe due to a unmatched set? I got a couple of expect I have tried a hp HSMS28xx (I don't remember the number but i can have a look, its a bridge-connected 4-diodes in one SMD housing) and a

Hi Nick, There is a list of vendors of Tek manuals at our web site. Try this URL: http://www.reprise.com/host/tektronix/resources/manual_sources.asp If none of those guys can help, there is always