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First build/acquire an integrating sphere. Bruce

Turn the 7603 off, and then unplug the ht lead between the multiplier and the CRT (somewhat carefully! You may have to undo the P clip that holds the plug/socket to the end of the HT chassis to get

hi, LED measurements are made with a strict geometry & equipment; and accurate determinations are not always trivial. Some useful web sites with information are found at NIST (US) & NRC (Canada) as

Hello from a long-time reader and first-time (I think) poster. I recapped a 2465 two years ago, after which I got a clear, crisp trace. However, about a year later, the horizontal sweep stopped

Whatever happened to Jim Yanik. On Usenet he was the preeminent authority on Tek equipment. I guess he worked for them for about 100 years. I mean if you posed a question, once I did, 7063 with such

Yes, but we must know if there is a HV fault. Hope it's not the multiplier. But we do need to know if there is B+. I figure the best way to proceed, once it is established that the low supplies are

Mike Merigliano 5:37am #149175 "Okay, but I did not think the posts about the Tek 475 had anything to do with Bob's computer, so I would have never guessed this." Hmm, the quote function didn't

Hello Dmitri, Fabio here again, On my last message, I was mistaken about the DM that ou have. I looked at it briefly on my mobile and thought it was a DM44, but it's in fact a DM43. I`m not sure how

The integrating cube sounds good if sufficient. You can improve the uniformity and efficiency to arbitrary degrees by adding more surfaces, say starting in the corners, making it k-hedral, approaching

Hmmm- I need to make a Costco run today anyway.? I wonder if Mountain View, Sunnyvale or the Coleman store have them.? I would think so as they are more universal than certain food items that only a

Integrating spheres, even on ebay, go for silly money but there is a way......... I wanted to get the spectrum of an NVIS compatible illuminated switch and actually got pretty reasonable correlation

Hi Ed, ? I've actually made an integrating sphere. ?Actually, it's an integrating box, because I couldn't get a round shape quickly and easily, but I suppose I could have picked up an old globe at a

The 7603 uses a linear power supply, not a switcher. So no ticking. Craig

Dan, I think you can find the sensor pieces to make a reasonably-priced setup with good spectral matching, but the tricky part is the integration of the total bulb output, on a "hobby" budget.

Of course, this is one of those subjects, like religion, sex, drugs, rock-and-roll and politics that I hesitate to respond to here as there are some fanatics about incandescent light bulbs in our

Okay, but I did not think the posts about the Tek 475 had anything to do with Bob's computer, so I would have never guessed this.

Hi Jeff, Two separate members of this group requested one manual each.... I'm sure they can see this note as they also saw my original post. I am trying my best to pay the generosity I have received

You've got a dead 7603 with no lights. Definitely look at the low voltages first. Check the 0.15A (150mA) fuse, F855, just because its 'filament' is so delicate it can easily become disconnected from

Does it make a ticking sound - like 1/sec? You may need to put your ear close to the cover to hear it. If so, it's something in the PSU - rectifier board, LV board, inverter - likely a shorted

That diagnosis gives no information regarding the location of any HV fault. If the -3kV is not present, the fault could either be the HV transformer, something in the string of components associated