Someone posted this here long ago and I followed these instructions successfully on two 576 curve tracers. Worked well! http://www.jacmusic.com/Tube-testers/TEK-576/Tek-576-index.htm Tom Bowers yahoo.

Dennis, A chemist friend once told me to try Dichloromethane. I have successfully unpotted two assemblies using this. First, it is nasty stuff, I put the part and the Dichloromethane in a glass jar wi

Yet another use for a Curve Tracer; In the 1970s we were having a problem with a custom digital logic family and interconnect through long twisted pair wiring. A transmission line problem. The wiring

Frank, Ray, I recently needed to measure some 600 MHz clock signals and the folks I was working with were not convinced that probe and scope bandwidth was so important, so I came up with this data. It

Rogerio, I had the same issue on a TDS684B. I removed the fan, peeled off the label and popped off the rubber cap. Then the bearing was exposed and I added 2 or 3 drops of oil. Slide the impeller in a

For what it's worth, I traveled all over the US with a 485 for nearly 10 years, back when you could put a scope in the overhead bin of an airplane. This scope had a probe bag so coiling the cord and s

From Dennis Tillman W7PF "Then it occurred to me that a 7603 with the right amplifiers might work just as well as a 600 monitor. " Wouldn't any dual channel plugin, like a 7A26 in both vertical and ho

The notch is pin 1, lower left corner in your photo. the part number is near pin 7. This is a quad 2 input NAND gate device from the fist vintage of 7400 series TTL. Made in 1972. Tom Bowers

I have used ChipQuik successfully on some 64 pin chips, it works by melting a very low temperature alloy with the solder, making it possible to keep the 64 pins all liquid at once. I would think this

I have several CRT filters available for the cost of postage. I found these when searching for something else. Here's the quantity and descriptions. If you are interested, contact me off line at pvhen

Ernesto, I have un-potted the X14 multiplier from a 7904 and there is a 10 Meg Ohm 1/2 W Carbon resistor on the output high voltage lead, connected to the last diode in the ladder. The reason I had to

The only electronic component supplier I know of in Tucson, AZ is Elliott Electronic Supply. They recently opened a surplus store in the other half of their building and today was the first time I had

Steve, I have a TDS684x (can't remember if it is a B or C) and it has always been very finicky with floppy disks. I have learned to format a disk in the scope and if it passes, then it is usable to ex

Hi Toby, I am curious about your TEK 604 application. Here's a little background about mine. Nearly 50 years ago I was part of a group of a few hundred people. We were developing hardware and software

Hello Toby, I have a new CRT for a 604, still in the original box, never used, it was purchased as a spare that we never installed. How do I contact you off list and where are you located. The CRT is

Hello, I have a 7904A and it works exactly as you describe. I consider that normal, nothing to worry about. Just a minor annoyance. Tom Bowers

Thanks Chuck, I was considering wax. The stuff I have available right now was intended for food canning. I'm not sure if that is appropriate. Also, I found this suggestion on another web site; "Dissol

I need to fabricate a replacement HV Multiplier for a 7904. I have a schematic, PCB, and parts. The remaining question concerts appropriate potting compound. Does anyone have any suggestions? Thanks,

Sorry, LH1262 is correct. LCs were a different family Tom

I haven't been following too closely, but just remembered some old Western Electric parts that Vishay still makes. These may be of value to consider for this mercury battery replacement. Take a look a