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I did same mistake last week on my CSA803 when replacing NVRAM on the timebase board(selftest error code E5322), the factory calibration data is gone,now when I measure a 100khz signal it shows me

Perhaps Tom means bits of internal support structure rather than the vacuum envelope?

If you have broken glass you wouldn't expect to see any beam at all. It is quite easy to pull the CRT out, see the manual. Try swapping the tube with your 2213A but not swapping the shield, then swap

If you are looking for something special, send me a PM and I'll see if I can help you out. Not sure how to PM you. Craig

That is what the RPR is for. You lookup 120-0866-00 and it says it was used in the 408, 412, and 414, all portable patient monitors. Dave

I found the subject transformer in a pile of Tek scope parts. It looks new. I am wondering what it belongs in? Last year I bought out over a hundred pounds of transistors, capacitors and resistors for

As it turns out, the timebase board is underneath, has a 200 MHz ovenized oscillator and a very long TTL divider chain. So no extender card needed. Probing it is simple, but replacing it is just not

Hi Reginald, All I know about 11K extenders is this: 1) They are extremely rare. I have only ever seen two of them. 2) The 11K series uses more of the backplane connectors than the 7K series uses so a

Pull the tube and examine it for broken glass bits in the neck. If you do see any broken glass, the tube is toast. Regards

I just got bit by "none of the above". Rather than Dallas, Maxim or ST NVRAM parts, U500 and U511 on the timebase board are NEC D43256C SRAM in a battery powered socket inserted into the PCB socket.

Hi Nick, Look in your 224x service manual in the electrical parts listings. Go to the parts for the A18 board and scroll down to the start of the CR listings for the A18 board. Starting with about

I hope no one objects to the cross posting, but I have instruments from all three OEMs. I'm getting ready to try to bring up my Tek 11801 when the replacement NVRAM shows up. In the process I'd like

thanks all, that’s what I thought too...crt damage...although the ship box doesn’t show damage, maybe it was dropped horizontally... I tested it out, even the DT and DV cursor measurements are

Well I’m not sure which ones would be appropriate. There are a bunch, for sure. Blue, silver, bigger, etc. I don’t presume to know why those different ones were selected for each location. I

These are not card edge connectors. They are 3 row pin connectors of around 90-120 pins and are used in the main card cage of the 11801 behind the CRT. --------------------------------------------

I recently wrote a Wikipedia wiki regarding the Tektronix extenders as part of a JAMMA Connector wiki that was submitted and recommended to be merged with the JAMMA wiki. I updated the JAMMA wiki with

Nick, I replaced more than that on my 2246A supply. For the pain to remove the power supply, I thought it would be worth it. I may had others that were leaky, I don't recall. I still have the old ones

You have a damaged CRT.? Most likely from being dropped. Regards

01950 [email protected]> wrote:

Where are you? (zip code?) ? Dan