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Michael For starters , do a search in the Tekscopes archives for a a long email thread on washing and baking old scopes to get the grime out . It may be as far back as two years ago but there was a

I'm learning my way around the 492 and don't yet have manuals for it. (I'd rather get print manuals than a CD copy...got a set for sale?) I'd like to be able to use the 492 as a receiver for AM and FM

Hi, now I finished the repair of this pretty old scope. I switched on and was afraid of getting "flames" out of it. This didn't happen but even after 10 minutes running no beam appeared on the tube.

Hi everyone, Thanks to all of you who responded to the photo captioning challenge. I have decided to award BOTH prizes, first place gets their choice and second gets the other. One prize was a new set

Greetings, I have an SC501 that has poor sync. The unit works better at Usec settings than Millisec settings. I can swap U200 with a unit that works good and see no improvement. I can set 2 units side

half Check zener diode VR1891 and cap C1890, both on A9 High Voltage board. Voltage at pin 8 of the CRT (= pin 9 of P901) should be around +30 volts. /Hakan

the birdies were coming from broadcast stations buy some 10 db n type attenuators from ebay and put them between the gen and 492 deane kidd might have some too

For some unknown reason, suddenly the trace(s)on my 2445A is(are) half an inch wide. The focus knob doesn't do much. All the other controls (shift, intensity etc) work normally. Any ideas where to

Hello, Since I had to pull the main board out I replaced all the Caps at one time the two 18000 UF and the 1000UF with newer style electrolytics I have a Sencor at work and will test the old ones

EHT regulation?..........................................Don C.

I would like to adapt a 5441 Oscilloscope to a custom application. The fabrication is straight forward. However, the CRT is just WAY TO BIG. With all of the mechanical concerns satisfied, would it be

Cross Post (with permission) from another list. ++++++++++ I have a Tektronics type 547 scope that my wife is making me get rid of because it is taking up too much of her precious space. As much as I

I would really like to repair an old 221 scope if possible but I'm beginning to have some doubts. There is some corrosion on the circuit boards but I hate to give up just yet. I First need to repair

He folks, any idea why my 516 scope has developed the bad habit of changing trace width and height when the brightness control is turned? The trace(s) are otherwise fine. Thanks, Joe

Not sure I've ever seen those options mentioned, but the minimum discernible signal should be in the specs. The noise floor of a 49x in 100 Hz RBW is around -125 dBm in band 1. The 8640B goes down to

I'm still learning my way around the groups. I may have sent replies to individuals rather than the group. Sorry about that. I went inside and checked all the cabling and found a few connections that

Gregor, With the exception of the stop sweep circuitry, a TR 501 is identical to a TR 502. The TR 501 was actually intended to be used with the 7L12. The stop sweep feature only works with the more

Hi! I'm looking for a TR502 tracking generator for my 7L12 for a long time now, but now I found an ebay offer for a TR501 that seems to have the same functionality. Is that correct, or what are the

I have a question on the power supply replacement of the caps on the 5V side the Negative polarity is reversed on the - 5 side? The old caps are not marked and I figured it out from the shield being

I have a Tektronix 7603 mainframe, with a 7D02 logic analyzer plugin. Unfortunately, I don't have any probes, personality modules or manuals. I'm not really what constitutes normal behaviour when you