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

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

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

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

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

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

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

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

--- 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

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

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

STunwall@... wrote:

on voltage CRT. unbalance is centered ...................................................................... Stan, Upon further investigation I have found that when the scope is turned on the

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

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 in

mtmpsmp@... wrote: Maybe, Mike. Looking at my 454 manual, I see that the collector voltage on both Q394 and Q494 should be about 41-42 volts measured with a voltmeter. Also, I don't think the

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

Sure. On the other hand, there are dealers selling test equipment who are completely legitimate, but have no idea how to use or test it. Example: Outback Equipment Maybe he lucked out and the

wrote: using the the on imbalance the .. to of vert voltage on voltmeter. that the There are TWO are amplifiers deflection should force circuitry. If shorted vertical that the CRT and Q494. and Q494

Hi Mike, You really need a 454 manual. The one I was using to remind me of the Q numbers was the one I now have up for sale on eBay right now. You should look at auction #1226363944 and think about