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1. "By the way, the C1130 is polarized, it should be a bipolar type" Why? 2. With only about 87V going through a 450V cap, you'll never have that cap correctly energized. That's why the cap's original

Adopted a parts 7603. I have the lv pcb + heat sink / transistors in a box, bad but repairable. It is missing one of the vertical supports (need to look at it again). Fan is there hanging out the back

Two places I'd suggest would be worth a post would be the Groups.io group Test Equipment for sale, wanted or exchange /g/Test-Equipment-For-Sale-Wanted-or-Exchange/ And the Yahoo

I think a friend of mine has it but it has been raped. I can ask. Are you modifying it to use the fan or what here ? Or is it missing or the PCB cracked or whatever ? If you need a working one forget

I made a mistake and typed too soon. Remove them if you wish. Sorry.

Oops, I think i spoke too soon...

Actually I don't like it when it happens. It could recur at any time. if it does I would look to the mode selection, which is what switches the IC's gain and who knows what else for the on screen

The readouts on my scope have turned into small vertical lines. The lines seem to be in the correct location on the screen. Intensity of the lines varies with the readout intensity control. The scope

It is like a car engine with one cylinder loosing compression. You never open the engine without doing a complete rebuild. If you take the heads off, you completely rebuild the engine. Makes for a

Hi, That is a hard task to find these and Ballantine is not too helpful. I asked them for an earlier calibrator (6125b). They were happy to send the manual for a 100 bucks. Considering i paid some 20

Hi Bruce Current product http://www.ballantinelabs.com/6127b/ so why not just ask them? Craig

The reason why is it the weekend and no shops near me have the full assortment of caps, I have a customer who wanted to have something repaired and he needed it the same day, I only have one scope

Woody While it's very satisfying to declare - "I found the exact problem!" - the method used in this case is an amazing time waster. This series of scopes has been proven to have bad caps in the

Well, found the problem. A dried out C1130 that is part of the voltage doubler that is working from the 42 volt supply. I also replaced C1130 as it was nearly dead. A tell tale for this voltage rail

Fellow Tekkies, I just picked up a Ballantine oscilloscope calibrator, model 6127B. Amazingly enough, the unit came with both output heads (boggle!) Does anyone know of a manual for this unit? The

Not just Niagara Falls. The entire City of Toronto was once on 25 Hz. As Plant Engineer for a manufacturing facility there, my grandfather oversaw its conversion to 60 Hz while keeping the plant

Please see "Simon's Cat" on You Tube. -- Richard Knoppow dickburk@... WB6KBL

I have Venus Equilateral on my hard drive. It was well written Sci-Fi, for it's day. It would have been a great place to develop new tubes, with all that free hard vacuum just outside their facility.

Wasn't that only in the vicinity of Niagra Falls for a while? (see Venus Equalateral by G. O. Smith for a treatment at the latter part, as well as a good view of how engineering was viewed at one

Nope, because according to the original definition, you must *open* the box to find out whether the cat is dead or alive. (it's a specious argument, at any rate. It has do do with what you know, not