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Hi, Tom. I received the UF4004 Ultra fast diodes and replaced the 1N4004 diodes in the circuits loading the secondary of transformer T710 but to no avail. The behavior hasn't changed. Just curious

Tektronix was surely a very minor user of beeswax for high voltage transformers. All TV's back in the 50's and 60's used beeswax transformers is far greater quantities and at higher voltages then the

Well, there is shellac, based on a resin secreted by the lac bug. It’s probably not useful for transformers, though. DaveD

As said earlier the shutter is of no concern (somebody here mentioned magenta when I disconnected the shutter: if you look closer there is magenta on the right lower corner, blue on the left and green

Knowing what makes "beeswax" beeswax? Well real Bees wax is the wax from a bee (generally in the US, Apis mellifera), from a gland when the bee is young and taking care of the brood in the hive. The

Can we use other animal's wax? Maybe caterpillars or wasps?

When I was in high school a retired professor who had a long-time habit of buying electronic equipment at military surplus

In the 90's there were some issues with CRT's on color TDS's showing a blue band on the CRT about a third of the screen area in size and located in the upper region. It didn't look exactly like yours

Jeff wrote: There are two separate display controllers in the TDS700 series, I presume that the 500 series color circuitry is similar.

Hi Martin, would you think that the dual FETs Teledyne SU2369A would be useful for your application I can send you a couple. Contact me off list. G?ran

Roy Thistle wrote: I don't think is exactly that we don't know what beeswax is, but that it's a common name for a set of similar substances based on their source, not on their chemical constituents.

Rather than fiddle around with driver stages, I decided to try Albert's suggestion of driving the TD directly from the last hex inverter (+5 to anode of TD, cathode to trimpot to TTL output). Somewhat

Confirmed, I have: meter hi: red meter lo: white -15V: black gnd: green +15V: red +5V: red [email protected]> wrote: -- Andy

Okay, I've done a little research on the Tek color shutter system, and it seems to involve not 3 colors, but actually 4 colors: Red, Green, Blue, and White. So the white regions are NOT being

My impression is that potting or coating compounds are ofte a mixture of bee's wax and rosin. Maybe of different waxes. To fill the voids it may be necessary to boil the transformer (or whatever) in

Hi thanks for the replies! I've found a t948 new-old stock, with the original box! and sinece it is already in my country I really couldn't resist.. it should be here by the end of the week. I think

Unfortunately, I don't think you can gracefully remove the filter and really look at the CRT. Assuming that you have three color filters (the older TEK stuff used two), then what happens if you select

I'm just getting around to assembling my test module and at first assumed the -15V binding post was intended to be white and the meter connections red and black. But then I noticed the meter (-)

"...running the CRT outside the scope case." already did that twice, without any incident. As for caps in the PS, not now; that's simple, my current problem is much bigger (I had a job in the PS

"To get a white image you have three frames of the same illuminated image with all three filtered colors, and the human eye integrates the three colors together" in my answer to Siggi, I asked, why