Using a degausser would work, but if the shield is permalloy or mu metal, the work hardening of the damaged area will re-magnetize if exposed to a field. The design of the mu metal or permalloy is to

Hi Tek fans. Me too. I am semi-bleeding for a tunnel diode. Please suggest substitutes or sources. Tek 152-0125-00, 4.7mA 15-18pF THANK you, aldue

The interface board had failed resistors which killed 2 transistors. Test Point 1443 read 22 Volts. It is supposed to be 27 Volts. Q1432, Q1436, R1437 and R1443. Noise kept the trace fat until the

Picture 0f 50mS marks is in picture folder "184 Time mark Gen. Needs filter Caps" , can't get oscillator to adjust to 10Mhz, max is 9.999843. I know this is close enough but I am retired and have

Hi all! Heating the shield til you demagnetize it would work, but what about using a AC degausser instead?  Turn it on 2 feet away and then bring it close and move it all over the shield, when you've

I should mention, in all fairness, that the case design was done by NearFarMedia and posted to Thingiverse. https://www.thingiverse.com/thing:3623622 Thanks,

Hi Miguel, You have an excellent point. Of course, the goal of this project was to leave the scope as absolutely stock as possible, replacing only the SLA battery with the battery / charger assembly.

Hi Gary, What I'm planning to do for the battery charger is have the boards fabricated and stuffed offshore. I'm awaiting a final quote from them - they need to source a couple of parts. So the "kit"

I based it on a process we used to repair cast iron gears. The goal was different, but the process worked fine. Neighboring shops wondered what we were cooking on the grill in the middle of winter,

Hi Bruce, That was a very clever way to fix the mu-metal. Dennis Tillman W7pF

Hi Ernesto, I would think it will be nearly impossible to find a mu-metal shield that is the right size for a cheap CRT you bought 50 years ago. Instead why not try thinking outside the box or at

I found out that the guy selling these Seimens motors got them from a storage unit auction. Since he is from Portland OR, I assume the storage unit must have been from a Tek employee. He did tell me

Common magnetic shield materials are permalloy and mu metal. Soft iron is also usable, but not as good. All of them have their shielding properties impaired by mechanical stress, such as being

This is quite a common issue on the 7104 and 7103. There has been discussion of it here in the past, but I don't think anyone ever tracked down the exact cause and cure. On one of my 7104s I was

Hi all, Hope everyone is well and avoiding cabin fever! Part of my cabin fever antidote is spending time in my lab. :o) Anyway, some of you may remember that I picked up a very nice shape 7104 +

Has anyone a recommendation for a mumetal Tektronix shield that could fit an old CRT of 4 inch face plate, 2 inch neck and 13 inch length? And... why hasn't Tektronix ever built a round face 4" CRT?

I'd be interested also, regards, Gary

" To use some of your words, "you are confusing calibration with adjustment". Obviously the word Calibration mean different things to different people. Calibration, at least how we did it at Tek in

Well done! But if you know how to make a lithium charger, your will know how to modify the 222 to work directly with lithium batteries :) Regards! -----Mensaje original----- De:

Eric, I have two of these AA501s. I curious to know how things are coming along. Did you go for the swapped part. Rick