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

Hello, I just completed building one of these kits and I really enjoy it. It's a wonderful kit and will be missed. Thanks to this group as a whole for such great information. Tom

Their web sites shows availability but their checkout system is disabled. I called the phone number, and was told to enter the info into Ebay, and it would show up if they still had stock, which they

I have two 576 Curve Tracers. One has everything working perfectly and the other has readout problems in the Beta display. I have two BAD and one good 155-0004-01 ICs. I know the problem is this part

Hi, I'm a new member of this group. My name is Tom Bowers. I have been a Tektronix fan since the late 1960s. I own an assortment of instruments and run an electronics engineering and fabrication shop