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https://groups.yahoo.com/neo/groups/hp_agilent_equipment/conversations/messages Still up here. Hope it moves soon. Regards

Hi Terry, A pity that I live in Melbourne, Australia ...... postage is probably prohibitive ..... :( I have a 7L13 in a 7603 .... working well at the moment. I found the 670-3114-00 board in the Artek

Where did the HP/Agilent Yahoo group go?? Is it here on groups.io?? Karin

Thanks for the help :) serial number is 28495. Im actually using the other 453 it was too pretty to part out. The other one is a pre 20,000 serial so it has nuvistors.

OK ...I assume from earlier question about supply voltages that the high voltage is ok as well? So at this point I am guessing after 40+ years the CRT itself is just tired?. You said you had a parts

Yes I did the grid bias adjustment. I get no dot in single sweep at all.

Yes a usable trace. I have been using it this way for years. After all the work it has done it deserves to be fixed.

And you did CRT grid bias adjustment on page 6-10? -- Dave Manuals@... www.ArtekManuals.com

And you get usable trace at full intensity but not exactly a "bloom" or overly bright? -- Dave Manuals@... www.ArtekManuals.com

Supply voltages are amazingly close to perfect after all these years. I have swapped intensity pots with another 453 and the issue remained. I dont start to see a trace until about 55V at TP 1047.

1)All supply voltages are ok? 2) Next "easy check" is to check and be sure the intensity control itself is not open at either end or at the wiper -- Dave Manuals@... www.ArtekManuals.com

Ok tubes replaced. Still did not fix my intensity issues :( back to the drawing board.

Hi, Having acquired a couple of panel-less X-Y scopes, I'd like to obtain the one-piece metal cabinet which appears to be a standard size across the Tek range. About 5" x 8 1/4" x 16 3/4", I believe

Ok never mind. figured it out

Short scan intermittently becoming full scan is often the plate connections on the tube. Look at the 2 flying leads under the tube, the furthest one away is often not connected. Magic? or lousy

Ok. Next question. How do I discharge this CRT. Only type I have had to discharge had the plugin where I can discharge it to the frame.

Regardless ...ALWAYS a good idea to discharge the CRT.. unless you just like doing back flips off your stool -DC manuals@... -- Dave Manuals@... www.ArtekManuals.com

Do I need to discharge the CRT to replace those tubes? Opened it up,looked dangerous arrived to the conclusion that I had better ask.

Dennis, It cost me about $50.00 for the parts. But I did order more than I needed. All of them came from Digikey. The bill of materials is in the Files section with the Digikey part numbers. I have

Hi Jeff, Why do you say there's 6.2 megohms limiting the cathode current? I only see about 1.83Meg (R810, R839, R829, the - guessed - dynamic impedance of GVS4, R838 and R837), and still, that already