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I am not sure I understand. C1224 in on the output side of T1201 and is the feed for the Voltage doubler input? cap generating -110V . what /where is CR 1224?? do you mean D1224? but if the Ac is

I am getting back to a project I've had on the back burner for a long time. About a year ago I left my 453 running in the shop on a very hot day. When I came back a couple of hours later there

Speaking of the classic 547 scope, does anyone have any information on how many of these scopes were manufactured or where to find this information? I looked at the 547 manual on BAMA and the highest

That would have been H?kan, and the album is linked earlier in the thread. Here's the link again </g/TekScopes/album?id=45980>. No offense, but I feel like this group's descending

Hi Fabio, What you see on the screen is determined by very small incremental currents (I forget the exact values but they are on the order of 1 mA) small changes in the current determine which symbol

I'm not sure now who "just uploaded some pictures of the tool" but there was no link to the pictures and no mention of what album they are stored in, making finding the pictures

Hello Lorn, Great news indeed!... So your problem is narrowed down to exactly the same cause of mine: One, or both, of the input FET Transistors bad. And I did exactly what you did, meanwhile I

LOL. You just perfectly described the one on ebay and amazon. Vince. -- Michigan VHF Corp. http://www.nobucks

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the [email protected] group. *File:* 7904 - U1275 IC Information

Had a BNC installation tool back at Wavetek back in the 1970's. Made in the shop there. Consisted of a hollow tube which fit on the outside of the BNC shell, and had a pair of slots the BNC pins fit

What album for what???????????????????? How about quoting enough of what you are committing about so we know what you are talking about?? Glenn --

That Ebay one I mentioned is brass so it is durable. At least the one I have, can't guarantee they didn't switch to aluminum but almost sure they didn't. --- * * KSI@home KOI8 Net < > The

Hi Roger, My answers next to your posts / questions... Thank you for taking the time to look at it! What you describe is exactly what I see on mine. By the way, the column in question here is

If you are referring to the Xcelite type wrenches the socket is made of steel and so is the driver on the handle. There is a name for the tool used to round out tubing but I am drawing a blank

Nope, running hot. But try it anyway and see what happens to your waveform.

HEY RENEE ! In case you're watching right now, disconnect C 1224 and see what you get. Just clean disconnect it. I cranked up the input voltage on mine and it made CR 1224 short. Then I got a very

Thanks to many for the info on the available BNC wrench; I never thought to search for "wrench." Someone who has one of those wrenches (available on eBay and Amazon), please explain if the hex stock

Tony, does the value of 5V lights fall below 4.5V when you increase the load to the point that the PSU shuts off? 5V lights is monitored by the Inverter Control IC U1275. A fraction of the 5V lights

I've been working on my 7603 Mainframe oscilloscope and just finished replacing diodes and some caps in the Intensity and Focus DC Restorer sections of the HV board. Here's a link the an earlier

Not sure I understand that. It is very unlikely that there is a short on the board which mounts the switches (vertical mode and horizontal mode). Check that the harmonica connectors are plugged in