开云体育

/g/TekScopes/album?id=86536 I tested a Toshiba A1962 PNP transistor to assess the overall condition of the step generator. It works as you can see from the link, however the trace

Hi Tom, Yep, and even under magnification it looks perfect. No glass, no elements akimbo. It doesn't look like it has been abused... except for the trace, that is. -Chuck Harris Tom Miller wrote:

I just got my trusty 7904 and tried the same test with squarewave. Same result as the 7104 , precisely rectilinear, no visible distortion. Cheers, Jon

I just paid $150 USD for one with several issues. Now that I fixed it I expect to get $200-250 pretty easily. If you dont want it, I will take it.

Good idea, I have an oscilloscope, I will put it to good use

Have you worked through the adjustment procedure, checked the waveforms against the manual? I usually find any faults/oddities that way, The step generator waveforms should be very clean. Getting the

296-1403-5-ND? x 3 LM741CNNS/NOPB-ND? x 1 I believe I will give this a try from Digi Key If this doesn't work I might look at replacing all the socket for the IC's on the step generator board

Hi Chuck, Have you had the tube out of the scope and inspected for bits of broken glass inside the tube? Regards

I already own 2 of them, but I would snap up another for that price.

UK pound is roughly equal to $1.30 At the moment. Jim Ei2BB. wrote:

Thanks Also I checked and I definitely have the TI IC sockets with the narrow pin inserts, I will look them over And a thank you to all who commented here, your input is helpful and appreciated

If you look at http://w140.com/tek_dsa_601a_602a_tutorial.pdf it shows use of the pocket signal generator with the DSA602. It is a single frequency, single level output. I have one but it didn't work

Raymond, Per your advice (and that clearly marked on the PCB!), I have purchased an isolation transformer. After watching a few videos online, I am still unsure whether I should connect ground from

PSU is most likely culprit, you will have fun digging down to get to it. Search the archives for info on this, there were many threads regarding the way to test the PSU out of the scope (carefully)

U360 is a plain vanilla 741 opamp

Dave, I recently stripped mine with acetone. That and gloves, a mask, and loads of paper towels had it stripped and sorted in a reasonable time. Work outdoors for best safety. My mistake was using an

Do you have the service manual? You can find it at w140.com/tekwiki. Your measurements of ripple are only slightly greater than the specifications in table 6-4 which also lists the limits on the DC

Ed and Chuck: I cranked up 7104/7A29/7B15. These were originally made for AES nuclear testing and 1000s used at LLNL, Los Alamos, LBL, etc. It was CALed by a silent key, Walter, a super

Hi Ed, Vertical deflections that remain flat for the entire width of the screen, regardless of the sweep speed, are by my definition low frequencies. Sweep speed has no effect on my scope's

I am certain that they are NOT all like this.... At least not to the same degree mine is. For instance, mine cannot, ever, under any circumstances develop a straight trace at the center of the screen.