Is there a good way to test a thin film HV control resistor set while in circuit? Finally getting back to my 485 repair after fixing a major leak in the primary water line to our house under the concr

I Love it! Simple, works, cheap, do it at home = functionally elegant. Thanks, Bob

Ok, I see Lyle is getting it.

Is somebody in the SF bay area going to pick this up? I can arrange for a relative to get it rather then have it scrapped. Bob

Bag the peanuts in leftover grocery store bags. That will help them stay in place. Also, I have used spray foam. Leave the plastic bag open at top over night to dry. Bob

http://main.aol.com/2013/02/04/conrad-farnsworth-builds-nuclear-fusion-reactor-garage_n_2617869.html?ncid=txtlnkusaolp00000058?test=latestnews&ncid=txtlnkusaolp00000058 Looks like a 4xx something (see

I recently bought one of these. Today I was testing transistors out of the 485 I am working on. Auto detects type and shows beta. I don't know how accurate it is, I was just looking for working vs. no

May have found something. Right after the Zin test point, with intensity turned full down on both scopes, At Q1742 collector- good scope 5.4V bad scope 12.7V. There is zener there. Will try and lift a

Thanks for the tip. It will help. I just bought up that part of the cicuit to look at. In fact I am just printing out the layout for note takeing. Note, nothing on beam finder either. Bob

The difference at Pin 5 was just a front panel button. When set the same, both scopes have the same value. Although Pin 15 comes from the delayed sweep control, both scopes are set the same. Now tryin

Note that the -50V is also Zener diode controlled like the 130V and is used in other LV supplies. Bob

Funny, as I was thinking about this while falling asleep, the thought of a stuck front panel switch came to mind, like being in single trace mode or something. It will take me some serious manual read

Quick test: I tried IC U1560 in the working scope and got a trace, so it looks like some input is keeping it in blanking mode. On to more circuit analysis and tracing. Bob

That is, U1560

Yes, With further review of the schematic, I realized I was going into the focus control. Looking back, I see pin 8 of U1560 affects the Z out test point. Testing Pin 8 on the working scope varies abo

Last night tried the Grid Bias adjustment procedure item 10 on page 5-10 and found a problem. The non working scope has no change at the Z Out DC test point when adjusting the A channel intensity. My

FYI, Found this HP description of a TEK HYPCON connector www.omnisterra.com/walker/pdfs.papers/packrep.pdf Bob

Phil, This group has been very helpful to me on several Tek non scope items as well as scopes. Bob

My P6015 came with an empty bottle. Please contact me at my email about what it would take to get it refilled. go_boating_fast@... location 95630 Thanks,Bob

I wonder if this is the same one that was sold about a year ago with a letter from the actual Maranz engineer? http://sacramento.craigslist.org/ele/3543273337.html