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#1
07-08-2024, 08:40 PM
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Tektronix WFM90 scope
I was working on my old RCA CC002 home camera and bumped in to an old scope I had forgotten about that I used in the 90's. The Tektronix WFM90. A hand-held analog AC/DC scope from the early 90's or so. I used one at the Phillies in the analog days as a sniffer to find the missing video somewhere. It is a full range NTSC scope with waveform, vectorscope, image video, audio and all kinds of tweeks for them in your hand. It would never replace your rack scopes but did the trick for the missing video in the field. The video is not great. It's early digi scope functions are the slowest possible. A long decay as the scope adjusts. Tek announced that they would not create a new HD version. We all wept. And now they are going for stupid prices. Get them before they are gone. They are your vintage friend.
https://www.aaatesters.com/pub/media...sheet_1x06.pdf
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“Once you eliminate the impossible...whatever remains, no matter how improbable, must be the truth." Sherlock Holmes. Last edited by Dave A; 07-08-2024 at 09:08 PM. 
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#2
07-11-2024, 07:15 AM
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Some on Ebay.
Our station had one, along with the TSG-90/95. The problem with these is that often they sit on charge for long periods of time and the batteries start to leak. You might can clean it up but if the leakage gets on the circuit boards it becomes more difficult.
What I discovered also is that parts are un-obtanium. We had a Tek 1735 waveform monitor that somehow blew an opamp. It was an exotic gold SMT style op amp that was no longer available. (Maybe, these days there is a fix available.) I bought a TSG170a bar generator off Ebay for a dollar non-working. It's a full 1RU high. Our station had one of these and I liked it. When it arrived I could hear something rattling inside. I opened it up and it turned out to be the 120/240 jumper had fallen off the pins on the power supply board. An easy fix!
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#3
08-07-2024, 05:30 PM
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Pretty impressive that it was color too.
Damn. Now I want one...  Dave A, How are you making out with you're RCA CC002? If you have a way to post some screenshots I'd love to see how the picture looked on one that was in good running order as it's a camera on my wish list. I just finished repairing a late 1960's Panasonic WV-033V and got a nice B&W again. Last edited by Tube TV; 08-07-2024 at 05:42 PM.
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#4
08-07-2024, 06:07 PM
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Since I posted, I bought a newer version. The WFM90D. It handles early SDHDI...Not HDSDI. Like new and the color video is still very low brightness but it is good for tuning my early cameras. It loops with the scope display going to your monitor.
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“Once you eliminate the impossible...whatever remains, no matter how improbable, must be the truth." Sherlock Holmes.
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#5
08-07-2024, 06:32 PM
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Tube Tv, the cam is in good shape and I will try to get some images posted. Without a service manual, I have figured out the video settings sequence leaving sweep and volts alone. None of mine needed caps. I got its Panasonic parent, the PK-200 with a lot of adjusting work needed. It had the rear IR filter cloudy issue. I am going to try a 58mm front IR filter to see if that works. Stay tuned.
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“Once you eliminate the impossible...whatever remains, no matter how improbable, must be the truth." Sherlock Holmes.
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#6
08-09-2024, 02:25 AM
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Quote:
You also might try it without the IR cut filter. My Panasonic PK-755 had really bad clouded IR filter and I didn't have a replacement, so I thought I'd leave it out at least till I got a replacement and it isn't even noticable in indoor or outdoor light. The color is dead on. There was a really nice RCA CC002 even with the original box a few months back on ebay. I wish I had got it when I had the chance.
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Linear Mode
