Hi Phil, The two boards are not soldered together, they are connected via several connectors pins if you observe with attention. I've already done a similar work to another 7B53A so I can anticipate

I was going to say filament voltage because some are DC and rectified off the HV transformer, but this one is AC. It shows 2 resistors dropping voltage to the CRT filament, I am leery because the

"I found two shorted diodes - 12Amp 50volts on the rectifier board. They were essentially shorting out the power transformer winding tap for the +- 17volt DC that feeds the low voltage regulator

You were right. And now my 422 is on its way to a new life. Anyway, i thought y'all might like to see a picture of it actually working, after 53 posts and

Hi Simone, If you are wondering where the term came from and why it is so appropriate , you can find out from 'Gulliver's Travels' by Jonathan Swift published about 1724(?) where, IIRC, an imaginary

Hi Jeff- you mentioned the ps is going thermal? I have been troubleshooting the AC/DC supply in mine, I have not got it working yet....hoping someone with more knowledge than I can help....however

Yeah, it has a certain quality to it. a (forget spelling) Jen es Sae Qua or whatever. It also had some stars in it. Huggy Bear in Starsky & Hutch, Dr. Sigmund whatever in MASH, a couple of others. And

On 4/8/2018 10:12 PM, Jeff Urban wrote: <snip>> . I used a bit from Putney Swope. If you're not too racist that is a good (cult) movie. I told the boss "When I get an unexplained bad output I get

Will surprises never cease ! Well, I upped the filament voltage. In the parts 422 there is no bridge for the filament, just a single diode. And I thought if I modified it with caps to get some

I have a dim trace which only becomes visible at around 70% of intensity pot position. I have, checked all LV for levels and ripple,swapped intensity pots, attempted to set grid bias, there is a

For what its worth my Tek microfilm has just under 100 images per sheet. Keep in mind the images are negative so they have to be converted. Just another step.

Hi everyone- I am hoping someone may be able to assist in fixing the DC-DC converter of this cute scope. I recently acquired a Tek 422 AC/DC that has ps issues. The history is it was supposedly

Hi John and Brian, Google doesn't know what a SR1976K or DR710903A is but the MR880 is easy. It is a 50V / 12Amp / 1uSec stud rectifier in a DO-4

Hi All- Hoping for a DSA guru out there to help with my DSA602A (fondly referred to as "the refrigerator"). More like a heater though.... A couple of days ago I noticed that it was not interleaving

The calibration constants are 16-bit (2 byte) values. "Endian" refers to the order in which multi-byte values are stored in memory that is only one byte wide, such as the NVRAM. Big-endian means the

Has anyone done the math ????? Lets give it a try using a manual scanner like the Epson V30 to V700 200,000 fiche lets say 50 images per fiche time to scan ONE fiche on my Epson at 4,800 DPI about

On April 3rd, I picked up a 2213A. While testing it, I noticed that the trace does not fill the whole display regardless of position settings. I tried messing around with the controls to see if I

Hi Max, I found my "parts" 7B53A plugin and have been looking at the switch you need. It resides on a board that is soldered to another board, so it looks like they have to come out together, and I

thank you, chuck your information is very useful I purchased as a programmer GQ-4x4 that is compatible with dallas and fram regards Simone

hi mark thanks for the information I was curious to try the copy of the dallas with the ADAS program but surely I will also try with Exerciser 02 as you told me you wrote "and in big endian order"