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The knobs crack, because the inner metal part is just pressed into the plastic, while of course it has to be a little bit too large, or it won't stay in. So on the long term, the knobs will crack.

@Harvey Measured voltage across 0.33ohm R624 = ~0.35V. So ~1A. Seems normal. One thing I learned reading through the circuit description is that 5V supply is referenced from the -22V rail. Would

@Hakan, thanks for the info, yeah but it seemed to confuse Eric on the part number(the 465 having a rectangular CRT unlike the 5 inch round CRT I would like to buy) but not to worry it seems he may

I had JLCPCB make some small parts out of black nylon for one of my plugins. They did very good work. Barry - N4BUQ

Have you already checked/replaced C940 and R949? I assumed yes but not sure. What is the voltage across R949 (0.51 ohms)? Measure on a DMM, not scope, then calculate the current. Does it agree fairly

Adam, Thanks for posting this and for the stl file. The Tek part number is 348-0075-00. It seems like the rear feet (guards), are always broken. I initially printed a prototype on my home printer

Obviously you didn't understand the info. To clearify... 1: The purpose of the other listed instruments was to help you find another donor which use the same CRT. 2: The purpose of the different

I meant that I get 1.9V on the bottom of C943 with 42 volts (and with the potentiometer turned a little). It looks like the regulation is working, but it still doesn't start up properly. To start it

Here are my measurements: Input voltage: 39.57V Q944: C = 10V, B = -0.3V, E = -1V Q939: C = -0.3V, B = 33.41, E = 33.91 C943 negative: -1.9V Q938: C = 5.58V, B = 33.28V E = 33.90V C942: 33.83V

I will check the stock again tonight I do belive I have one of the T0520-31. I will let you know this evening. Eric wrote:

Forgot to mention the apparent brightness of the trace in the picture could be a camera artifact, being more sensitive than the eye. You'll have to judge the actual brightness. Also,having the CRT

The recent comments made me look at the picture. Yes, that intensity looks really cranked up too high, obvious from the blooming. The retrace blanking isn't perfect, so some will show through when

@David Holland thanks for your post David, yes I've seen a good e study from a German fella here https://www.wellenkino.de/557/viewtopic.php?f=5&t=17 translated basically it was an easy mod &

@Eric thanks for checking your stock Eric but Hakan seems to have confused my post by putting lots of spurious part numbers I've checked the Tek wiki site and cant find the 154-731 CRT listed so i

Where: Museum of Radio and Technology, Huntington West Virginia When: Saturday, March 16th 10:00 am to 4:00 pm Come help us clean out our storage buildings. We have a large quantity of test and

500-series knobs are plastic over a metal insert. Dave Wise ________________________________ Sent: Thursday, February 15, 2024 8:02 AM To: [email protected] <[email protected]> Subject: Re:

Have you worked on any high-rel or military equipment with knobs? They usually used knobs that may be plastic (sometimes bakelite) but the knob is molded over a brass or aluminum insert. The set screw

Bo brave on progress. All the decades old knobs suffer as the plastic is stressed by the design and ages to crack. Even if set screws are tightened carefully the knobs tend to split at the hole of

Hello, have no had 2465A in decades but these comments apply to 2465B and perhaps also to 2465, 2465A. Get service man for your model and serial range. see long threads on EEVBLOG: Tektronix

[email protected]> wrote: AM503 current probe amplifiers, and they all work absolutely fine. They're definitely not the A or B version, just very basic (and very fixable) analogue ones. So I