Hi all, what is an OK functioning Tek 2205 worth in terms of replacement parts? Does it have anything that's worth in order to repair other scopes? I have someone who might give me one of those for fr

Free to a good home: Ciebo DS-750 development tools kit for Philips 87C750 I expect this is largely limited to historical interest, but I hate sending this to the landfill if there is the remotest cha

The following photos have been uploaded to the Sampling with 3S2 album of the TekScopes@groups.io group. 0325211621-00.jpg 0325211622-00.jpg By: Charles <charlesmorris800@...>

I wrote a few weeks ago about no Horizontal trace on my TEK465. In the meantime I have replaced bad caps and transistors to the point where I have a sweep signal going to one of the CRT grids. I do no

I've done some research, and I think I've found the cheapest parts source (other than Stan Griffiths) for recapping the HV section. This applies to Types 531, 535, 531A, 535A, 541, 545, 541A, 545A, an

Quick update: I was able to remove Q1197 from the +75V regulator circuit quite easily by loosening the power transformer and taking the rear panel off to go in through the fan opening. Threw that bad

You may recall that I have an S-1 sampling head with blown diodes, which I replaced with M/Acom MA4E1339 Schottky diodes in SOT-323 packages. I used both diodes in the package in series, max 1.2 pf ea

I’d be grateful for comments on my component choices below, which are for an upgrade of my 2230 PSU as per Tek’s Product Modification 060-2239-03 (‘Q935…Q9070 Replacement’). Although my scope works, I

The following photos have been uploaded to the Sampling with 3S2 album of the TekScopes@groups.io group. 0324211757-00.jpg 0324211758-00.jpg 0324211803-00.jpg By: Charles <charlesmorris800@...>

Yesterday I picked up from eBay a Type 106 High Amplitude (120v into 50ohm), Fast Rise Square Wave Generator. I haven’t received it from Germany yet. I’m wondering whether I should keep the original l

I'm wrong, it is a Bourns pot. Found it out after a thorough research (= reading the back of the pot). Looking after more information about these pots I came across Bourn's Potentiometer Handbook. Int

The following post was initially in tek500 group; it seems that group is not as active as this one and I thought it may help if it's posted here (I see other posts for 500): Have an FG502 for while; r

Every so often, I get some intriguing test gear from inside places that make test gear. It's fascinating to see what they use themselves. I just overhauled and posted such an item, an HP K09-0982B, a

I decided to further test the ones I had pulled out of various pieces because of the leakage. I know they test as a diode. The round lead 0367 types with the oxidation on the leads close to the body t

I've had this 2225 for quite a while and it has always worked flawlessly. Then, yesterday, it was standing on the rear feet (screen upwards) and got knocked and it toppled and the handle struck a shel

I've just taken delivery of a very tidy example of the Tek 127 Preamplifier Power Supply. I've often wished that my 535A had more horizontal bays, and now it can have them. I note that it has selenium

Well, this thread just showed up on EEVBlog. This is exactly the kind of damage that I used to see happen to IC and to TE accessories that were stored in the old antistatic foam. <https://www.eevblog.

The following photos have been updated in the Sampling with 3S2 album of the TekScopes@groups.io group. GR oscillator display with Russian D42 replacement, 750 MHz unsmoothed By: Charles <charlesmorri

I received another patient...this time it's a 454 that is outwardly fine (actually it's in superb condition), but had a very serious HV fault. Apparently the previous user was using it and it started

Renée wrote on 3/21/2021 1:17 PM: > unfortunately I too have had the same experience. foam-lost a bunch of > microprocessors and assorted items that I thought were in safe place.... > and regarding Du