If your scope intensity double peaks, it could mean that it is gassy, or it could mean that it has low emission. Running the CRT will help get the gas absorbed by the getter, so it may

Answering my own question, I've just updated the 1L40 page at Tekwiki: http://proxy.w140.com/tekwiki/wiki/1L40 with a bunch of new photos of the plugin and of it in action, together with a couple of

I know that ceramic capacitor are aging very well. But those 4000v cap wasn't looks like caramic to me so i asked the question. And someone tell me yes check the caps. So i wanted to check those cap

https://archive.org/details/73-magazine-1976-11 page 179, "The Smoke Tester" has a basic design that uses a driver transistor to reduse the current through the pot.

Yes. See a disassembled 465 tube at https://entertaininghacks.wordpress.com/2016/03/09/rescuing-a-broken-tektronix-465-crt/

Dennis, keep an eye out for electronic loads from Transistor Devices (their 'DynaLoad' series). I've used several, and they were a favorite at Boeing (I actually found mine at Boeing Surplus, back

I'm curious, why are you fixating on the caps? I have never seen one of the HV caps go bad in a 465 or 475 scope... Triplers, yes, but caps no. The best, easiest way to see if everything is ok in

The mesh dome is generic, one is as good as the next. It does not wear out. The 475 does not have a nice sharp beam. It is inherently about 1.5 minor divisions wide. It is at its absolute best when

Hi Michael, That is a fascinating video. It was really clever how Tek managed to make such fast digitizers when semiconductors could not. I remember clearly when TRW introduced a state of the art 6

You just have to decide if you want red or green LED displays or one of each. :-) Bob.

Prices fluctuate a lot, just put one in the Ebay search/notify and keep watch of your emails. If a match is found you will get an email once a day. One reason for the high prices is 90% of the

https://www.youtube.com/watch?v=3q97h4O6uII

http://www.arachnidlabs.com/reload-pro/ I'm unsure of the voltage, but with the fan kit it's happy running 50W all day long. -Bob wrote:

Is this mesh dome inside ? Maybe i could swap the Crt's and see if problem follow the crt. And also swap the caps... i'll let you know

I bought a Kunkin KL283 dual ch load 80v 15A 300w some time ago. There are higher voltage and current units available. Got it from eBay. Given the price advantage compared to name brands, it works

Why not build one? One or more 2N3055s and a pot. Heat sink, fan and base resistors as required. I've built many and have even burn-in tested some 50A power supplies with 'em. Vince. --

Also, if you are inclined to build something. Kerry Wong did a nice video on the topic here: https://www.youtube.com/watch?v=Vr6YsT403DM&t=1s -- 73 Joe Laffey

A few years ago I picked up a Kikusui PLZ-150 Electronic load. Just looked at a couple on e-Pay and got sticker shock. Don't know why they are so expensive these days. 73, Dick, W1KSZ Sent from

I have one of the: "Constant Current Electronic Load Battery Discharge Capacity Tester 9.99A 60W 30V" loads from Ebay. It only does 30V (and it will not function above that). It works very well

I bought one of the Chinese programmable loads, what is called a 3700 series. They show up with various names mine was an Array 3710A. Input voltage up to 360V, current up to 30A, power up to 150W,