Hi all, I recently acquired a TDS784C scope and I'm interested in adding the HDD and video trigger options. Also an early serial number 2M (8M memory) option board too. If anyone has these parts

Bruce, Replacing the backlight is apparently easy. Here is an entire thread discussing the topic https://groups.io/g/TekScopes/topic/83184585#183313 The web interface for Groups.io provides an

7B92, S/N B052568, No Sweep, Help! Since it has been almost a year since my 7B92 arrived in my new-to-me 7904 I’ve decided that it is time to make it work. Test setup ‘92 installed in right-most

coincidentally but apropos, on a 465B, i just had a film cap fail that was apparently used by a previous owner to replace a failed tantalum filter cap. he used the same voltage rating. it was rated

Fellow Tekkies, I'm on the tail end of my annual run to the Bay Area, and one of my acquisitions is a Tek 1503C TDR. The unit's in outstanding electrical/cosmetic condition, and even has a good

Although I have never used film caps myself, I would think that they would be a good alternative to tantalum caps. Much better than aluminum electrolytics, for sure. -- Michael Lynch Dardanelle,

Martin, Replacing tantalums with film is fine. I have replaced a lot of the axial types that are 1mfd and lower with film. The radial types I also replaced with film. The originals were high ESR. One

Michael, I was indeed planning to substitute burnt Tantalums, by similar ones,albeit with a substantial higher working voltage. This is a proven repair method in REVOX, STUDER audio equipment where

Roy, thanks for asking. I'm in outer East Kishniv... Actually Dallas, Oregon 97338.

Resistors are not that far off to cause the issue you are seeing. First check if the vertical deflection plate is connected to the output of the vertical amp. Sounds unlikely but there were cases of

Mark, You are absolutely right that I want this rather than need it, and I don't really want it all that badly (as I said, I have another scope that does everything the 485 can, only better). You're

well q387 and q386 test good,the resistors seem ok to me bar the ones measuring 57 ohms,would being 6 ohms high cause this?

Deflection plate disconnected trumps bad amplifier. Harvey

I don't know if you have actually opened it up to take a look around, but if you haven't, you should check whether one of the deflection plate connections has come loose. I've encountered a handful of

The more things you have to debug at once, the more difficult it can be.  I'd go to XY mode and debug using that.  I'd hope you have a second oscilloscope, because otherwise things get

Replace the four resistors you asked about with https://www.mouser.com/ProductDetail/Vishay-Dale/CCF60340RFKE36?qs=%2Fha2pyFaduhwK32S4jrtN7H6uGCoKCRsNsGmRuIvfhY%3D. Mount these resistors off the

Dave Daniel wrote on 10/21/2021 6:02 PM: <snip> Hello-- ...From Bob Dylan's "Stuck Inside  Of Mobile With The Memphis  Blues Again": ...And I say, "Aw, come on now You know you know about my

Richard, Try cleaning the switches including the time base contacts. Dirty switches can cause a lot of problems. Cleaning IC and transistor sockets may also or should be done. The power supply

hi all i have a sick tek 2215 scope,the issue is the trace is too low on the screen( both channels affected ),i can only position the trace about halfway up the screen using the position controlls,i

Hi all, I've recently become the proud owner of an early 466 (IC date codes are all '74) that unfortunately is a bit poorly. I've done bits of hobbyist electronics repair in the past, but I've never