Dennis. I am happy to hear both of you are doing alright. I hope she got the card I sent a couple of weeks ago. Mark

Interesting and a good read. Thanx for posting.

Glad that things have turned for the better. Harvey

I just uploaded an article on the MCP (MicroChannel Plate) first used by Tek in the 7104 CRT. Title: The MicroChannel Image Intensifier Author: Michael Lampton Periodical: Scientific American, Nov

Fantastic news Dennis, great to hear it. Major surgery is always difficult and anything that results in significant trauma takes time to recover. Really glad to hear Marian is on the upswing.

Good to hear she's on the mend, Dennis. Take care of her and take care of yourself too! Sean

A little more than 3 weeks ago I had no idea my life was about to be turned on its head. Marian's hip replacement operation went extremely well as far as the medical staff was concerned. She was

I thought that sounded familiar.  I've made a number of them, only had to buy a bunch of fiber washers.  -Dave

?Exactly, Sean. The second screw to back out below is the one in the pot's broken plastic cross. With the rod gone, you should be able to disconnect the pot, slip it out, and fit it with an Adney

There is an extremely effective do-it-yourself solution to the high prices on eBay for GHz probes like the P6056 and P6057. Douglas C. Smith describes how to make your own out of readily available (at

No worries, thanks! I'll have to get it on the bench again, but I have a question. When you say "pot's own setscrew" is this the one that is in the broken plastic bit or is there another one I'm

The old adage "if it ain't broke don't fix it" applies here. I wouldn't go recapping it or rebuilding the scope unless it was absolutely necessary. The only problem I had with my 556 was the dreaded

Hi Bill. As owner of some 556 scopes I have had some experiences during their restoration. They are pretty well engineered and I would say ultra reliable. The only area I would caution about is the

I made a deal to buy up the Tek spares stock of a closed service center in europe last month, in order to get some hard to find 155 and early 156 parts. I have gone through them, and will be posting

Cool Tom. Thanks for that, though I'm still only understanding about half (generous) of what you're saying. It will contribute as I continue to study though. The insights to the purpose of the

I would do that, except for one small problem.  I'm using EAGLE 7.x with a hobby style license.  I am specifically prohibited from selling the boards.  Now, if I could guarantee that nobody would

Right side of the scope, A8 board. There are 4 right in the middle of the board. You should probably be able to see the silk-screen notes for (top to bottom): B FIRE, B ARM, A FIRE, A ARM along with

Hi Harvey, If you're not considering selling them, have you considered to just make the gerber files available online (let's say github)? A lot of people now regularly buy PCBs from JLCPCB or pcbway.

I've got a 465 and I didn't know there were any tunnel diodes in it. Where should I go looking for it?

Hi Dave, That network provides temperature compensation of bandwidth. A peaking capacitor (a trimmer) already exists across the emitter degeneration to boost bandwidth. The varactor in parallel