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Toby, If it is a hard, brittle ceramic-like slab, it is probably alumina (aluminum oxide). It is a good electrical insulator and a reasonably good thermal conductor. Beryllium oxide looks similar, but

Toby, I believe that is Mylar. You can find this out for certain in one of the many resources in TekWiki. Most I have seen have some sort of thermal compound. -- Michael Lynch Dardanelle, AR

Hi, In preparation for testing/replacing components on the HV & regulator board, I removed it, and seem to have accidentally broken one of the heatsink pads under a bottom transistor (see pic). What

Hi Albert, sorry for the late reply but during the week I work hardly and in the evening I am too tired to take care of my Teks and I want to avoid mistakes. Anyway I took just now some photos of the

Reg, I would be interested. could you provide more detail? Ray, W4BYG at ATT dot net -- This email has been checked for viruses by AVG. https://www.avg.com

At least two of them. [email protected]> wrote:

Ahhh I see, so it's a feature not a fault, Denises explanation is really thorough and easy to understand. Since I replaced the Telequipment special blanking JFET with generic J113 I wasn't sure if

That's great Max. Good job. They are nice little scopes. Regards, Tom -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

Yep - I replaced them all just for good measure!

This is Very Good advice. I would not go into a scope and just replace one of the caps. They all can easily be in a similar condition in the near future. -- Michael Lynch Dardanelle, Arkansas

While in there you might want to replace all the caps that where listed above, so as to future proof the PS section some more. Use nearest value and voltage equal or higher. Modern caps will be

Hi Ondrej, see that post: /g/TekScopes/message/157201 The shadow / flare effect is explained Bye Max

Sorry that should say "and I noticed the 33uF/160V on the 100V PSU output WAS DAMAGED, I REPLACED IT,...."

Good news! I replaced the PSU filter caps, and I noticed the 33uF/160V on the 100V PSU output, and it's all good! Looking at the base of this capacitor, it was quite obvious that it was the failed

Hi, I've been working on a 603 XY and began by recapping and testing on Variac, which cleared up display bloom and a squiggle. What I have now is: * a somewhat defocused (2-3mm), very bright spot *

Hi chipbee40 Yes, I am on 220v Thanks

Hi chipbee40 Thanks for your concern and suggestion. For c906 I had replaced by 100uf 450v type. And now I checked out of the circuit the esr meter shows 98uf and 0.34 esr. Thanks Saroj

I have two of these: http://w140.com/tekwiki/wiki/106 Now obsolete for my purposes as I have a couple of Leo Bodnar's marvelous <40 ps units. If anyone is interested in them PM me and I'll take

Hi Max, Any progress? Today I used an S-52 on an extender, case removed, and then thought of your problem. I read your first post once more: The 1N3130 is a 50mA/25pF TD, while the original one is

I see a couple of spiders plus some styrofoam. --Victor