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During thermionic emission... where electrons are "boiled off" the filament, or the heated cathode.. they form a cloud in the space around those elements. Literally, it is a cloud of charged particles

Hi: I am looking for a 475, 475A, rear bezel.... the plastic plate (with cutouts) that fits under the rear feet. One from other models might fit too. (If people need the part number, I'll look it up

Still chasing a working copy or original of the Diagnostics Tape for the 4041. DaveB, NZ

I once had an RM35 with double-peaking. The beam stayed focused across the initial peak and dip, and only broadened when I cranked Intensity to max. YMMV, Dave

The 1A contacts and the 10B contact are also closed in those positions.? I don't have a PG506 with me now to check further. Bob.

Hello-- I have a Tek 555 manual as part of a bundle of Tek manuals (see below). I'm offering all of these manuals as a group to free some shelf space-- hence the bundle costs $26.00, or if you're

I recall something Peter Keller said to me when I asked him about this phenomenon. He mentioned that he didn’t have an explanation for it but he felt it could be a manifestation of cathode interface

On Thu, Feb 21, 2019 at 07:45 PM, Fabio Trevisan wrote: > > Hello Albert, > > > I don't see the rationale behind this. With rising grid voltage larger rings > > on the cathode disk take part in the

I do it, just have to look for the blue transparency film.

There are two different power supplies due to primary winding. Serial number dependant.

Not a pest. I wish I had help when troubleshooting my 555’s when I got them. And a bunch of other scopes too. I parted out many scopes because I couldn’t figure out how to fix them. That includes

Yeah, Tom, it's a good idea to have at least a second unit of any of this old equipment.? For comparison and for parts.? Now if I could just sell my wife on that idea....Jim Ford?Sent from my

Hey Matt, you are NOT a pest! :-) Whatever you do, don't quit on it. There's nothing else like a 555! A real pleasure to operate and extremely versatile! When you consider the range of plug-in

I recently pulled one of my 555's out of storage to get it working and warm up my shop. I checked all the electrolytic caps with an ESR meter first to weed out any that were obviously open or shorted,

On Thu, Feb 21, 2019 at 11:57 AM, Colin Herbert wrote: > > I haven't seen this anywhere on this forum, but if I am re-inventing the > wheel, I apologise for taking the bandwidth. > I have a 7623A

I haven't seen this anywhere on this forum, but if I am re-inventing the wheel, I apologise for taking the bandwidth. I have a 7623A with a collection of about 14 plug-ins and two TM503 and one TM504

http://w140.com/tekwiki/wiki/555 "Filament Supply Regulator Regulation of the filament supply happens as follows: There is a feedback loop that is formed between the indicator unit and the power

That answer went by earlier. They said since tube filament transformer is in the indicator half, you need it to get regulated PS volts from the tubes in the PS half.

Hello Albert, Yep, as I mentioned... my rational may be (and probably is) flawed. Back when I was still struggling with that 464 and romancing the chance there could be some level of recovery to that

Ha ha! I got it for a song and paid through the nose for shipping! And had the parts kicking around for repairs up to this point! Also i wonder if anyone actually know for fact if you can run and test