That seems to indicate that the horizontal amplifier, in the x10 position, can swing enough to give you proper deflection. This suggests that the X1 pot and the components (and perhaps switches) are

Yes, in the x10 position the trace does indeed seem uncompressed. I can find the "whole" trace by moving horizontal position, i even counted # of square waves to verify.

Tom, Before my last post, I photographed (as a method of marking) the x1, and x10 pots and sprayed a small amount of Deoxit under the "dial" - the pot looks like it may be sealed, so I have no idea

Brian wrote: Yes, it does. Thx. Any chance for a few links, save me digging high and low ? I'd want the PCI version of any card. ISA is just -so-last century :-) Not one to be lazy, I did some

It only takes a little wind gust to throw things out of whack. And nicking your tail rotor is not good either. When working on a contract with Denver Police many years ago had a chopper take off

Hi Bill , I have several of these video camera's but not the Tek frame grabber or software . I have a Cortex frame grabber which works very well and some Cortex s/w available on their website some

All: Just like the Energizer Bunny, the 475 is "Still Working" and the "Tilted Trace" is banished. That 82V Zener Diode must have been the intensity problem. The "new" CRT fixed the tilt. Thanks

Anyone have any experience with these; the frame grabber board and the software are a complete mystery to me. TIA for any help/admonition. Bill

Eric, You read my mind. Yes, I actually have both a 576 and 577. See my reply to Tom below. That "suspect" diode exhibited a "normal" zener trace then suddenly broke down and I got an almost

Sounds like you nailed it -- great job! It's always nice to have a hangar queen to provide substitute parts for quick troubleshooting. High-voltage Zeners can suffer from unstable surface breakdown,

Yep defiantly a bad zener. I had a 140V one do that at take out the negative power section on a 5200A I would imaging this would be aggravated by heat, IE cooling it off would make it behave warming

Tom, Thanks for your kind reply. I may have answered my own question. After writing that post, I thought that I might actually be following or understanding Chuck's explanation and that I might

Do you have access to a curve tracer? If so I would put VR1374 across it and check it at its zener voltage. It sounds like the zener is acting up when warm. But if it is an 82V Zener it sounds WAY out

A not uncommon problem that causes the behavior you describe is cathode-grid1 leakage. If you preclude the usual external circuit causes, then it could very well be a crt problem. If you still have

Chuck, I know, this is an old post and an often discussed topic. I have a similar problem. I am working on a 475. This one had a bad CRT a broken support rod inside the CRT and a tilted trace. I

Hi, I've had this exactly with a 684, about half an inch radius around the SMT Lytics showed oxidization, it took me 2 days to safely unsolder the 72 capacitors in this unit without harming the pads.

Those people are exceptionally nimble and brave, they earn ever penny they get. The greatest danger, however, is probably not the high voltage, but rather the helicopter. Hovering at that low

Leo thanks for the info. Now days I am mostly a buyer so I see it from that point of view. I hate to have to pay for the shipping to Kentucky then pay more for shipping to me. But mostly I have no

It's time to put on your Faraday suit and go to work.... https://www.youtube.com/watch?v=m0MiK4Jnx4s Greg

Hi Ed, Please ignore this if you tried already. Set the left-off-right switch to off, steps to 1, base current at 10 uA steps, horizontal at base voltage 2 V/div. The base voltage choice terminates