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I wouldn't consider zinc-air batteries a good choice for this purpose. Zinc-air batteries have a relatively long shelf life unopened but once opened (activated), they discharge rather quickly, even

Hi Kevin, Raymond is absolutely correct, I did use the wrong schematic. The cap I suspect is bad is C-4439. And I agree with his comment about what to try. If you really can't find a cap easily, let

I wish I could direct this question to the engineer who designed the sampling bridge in the 7S14 plug-in. The original design made use of Mercury batteries in the sampling gate back-bias (BT1 and

Connect a BNC Tee to the lowest, most central connector. 2 fingers around that and your thumb against the bottom of the mainframe while operating the release with your other hand should be enough

Hi Kevin, 1. I think that Tom made a mistake here. C1512 is the correct ref. for a 465. In a 465B, it's C4439. In my 465B manual, it's at the top of the Power Supply schematics (page 12), right

I don't have the scope in front of me at the moment. This image has a partial serial number included. Its ?067605 so it should be in the range of the service manual that came with the

What's the serial # of your scope? Easiest way is to remove one leg from the circuit and make a direct measurement of it, both capacitance if your DMM does it, and also ohm it out. An ESR meter

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Thanks Tom and Raymond for the advice. Two questions from a novice troubleshooter. 1. I don't have access to a 550 uF, 100 volt electrolytic cap. Tom, when you say "tacking a radial leaded cap across

I would leave the +55 V alone for the moment. A small deviation is unimportant and any adjustment might necessitate a recalibration of the 'scope. Your problems are not caused by the possible

Hi everyone. My AM503B shows error 355 for some days now - NVRAM error. Checked the battery and it is dead (shouldn't it show "LO" before that?). Does this mean the calibration is

And I'm not too far away from Tom, in Waldorf MD. Dittos on if you are ever in the area. Mark

If all else fails, I've managed to remove a stuck plug-in by upending the scope and removing the bottom panel. It's then possible to dismantle some of the runner assembly and with some gentle bending

Shirley: I see these free CRT TVs in the Penny Saver nearly every week. People just don't want to pay to have them hauled away. Old TVs will run you ragged with repair bills for the parts

Also look at the freecycle groups. Just google it. And yes, there will be tons of crt tvs after xmas.

Shirley, That is a really good idea. Let's pray that this one lasts until then. 3 weeks and county. Thanks, rich! [TekScopes] wrote:

In most places these days, people are regularly giving away CRT TVs. Yes, giving them away for nothing. If you just want a replacement, keep an eye on Craigslist for a couple of weeks; one or more

Hello all, I want to apologize for taking so long to get back with everyone. My fibromyalgia is acting up. To everyone I am disabled, unable to work, on social security disability, and very

Here is a better part: http://www.mouser.com/ProductDetail/JKL-Components/7153/?qs=sGAEpiMZZMucm%2f%252bFOY0TQtr%2fchrLORC0dASou9Vc3AU%3d HTH, Tom

All those voltages look good. Since the +55 volts serves as the reference for the other rails, and it is slightly low, so are the others. There is an adjustment, R1538, that sets the +55 level. If you