Hi all, I have been accumulating TM500 modules and mainframes for a little while, so I recently finished building an 067-1201-99 TM500 mainframe tester from the Tek construction notes floating around.

Hi Ozan, Yes, it's funny how once you notice something, you suddenly see it everywhere. In the case of the 741, that NPN-PNP mashup was done to work around the terrible performance of PNPs. By combini

I recently picked up a 5A21N scope plug-in as a parts unit from which to build Jared Cabot's updated TM500 mainframe tester. I noticed this type lacks the back-plate or lower guide-pins found in some

Still chasing a working copy or original of the Diagnostics Tape for the 4041. DaveB, NZ

Hi All: I started this topic, to see if we are interested in coming up with way(s) to satisfactorily construct "blank" TM500 modules, for custom plug-ins. What ways and satisfactory mean will have to

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

Hi, Since I’ve had this scope (2235), it’s one that I enjoy using because it’s fairly light in comparison to my other ones; the form factor is convenient. And it gets the job done for my needs. Howeve

Hello, I just spotted some TDS5054B-NV-AV variant of the TDS5054, but after some googling it seems I can't find any information about what that NV-AV variant is about... Anyone can shed some light on

This book has been in the PHILADELPHIA PA NETWORK DISTRIBUTION CENTER since Jan 8 and it hasn't moved. Tracking #: 9549016335941002722853, Bryn Mawr PA 19010 These two books are still in the SEATTLE W

Hi all, I am fighting with a 2235 PS. I previously repaired several 2213 and 2215A's, and it "always" was the primary switcher, but this time.... I removed the Power FET to apply a external 43VDC to s

What is the current state of the art for replacing the 2020b late model NVRAM? 0. Looks like the Dallas DS1225AD is a drop in but requires extracting the configuration data. (Yup, I get that my 2465B

Sorry it's 2336 > > > > > >

https://www.shopgoodwill.com/Item/113415082 No affiliation. It looks nice and clean. Bert

Hi all, I am considering purchasing a used TDS7104 scope and I really need the PW3 Power Analysis option which the unit I am looking at does not have. I contacted Tek sales and they flatly stated they

Hi all, I recently picked up a P6137 scope probe for a song and thought I'd try my luck. Predictably, the center conductor on the cable is open circuit..... Is there any way to repair or replace this

Someone here (I believe) was preparing a BOM for the Jared Cabot TM500 tester but with DigiKey stock numbers. Has that been completed? And, one capacitor P/N was incorrect; what was that? Note that in

Pleased to report a package of Peter Keller books arrived safe and sound in the UK end of last week. I was rather surprised how fine these are - nice hardbound volumes with nice design work - a pleasu

One more detail I forgot to mention: The international orders for Peter's book are all sent via AIR MAIL so they should arrive fairly quickly even though they are going around the world in many cases.

John, I do have a manual that contains a schematic for the 6106 (most probably from tekwiki). I do see the two inductors, but they don't look like part of a T-coil in this case. They certainly do have

The 6 books destined for the Springfield Bulk Mail Center have arrived there and are being distributed to the local destination post offices. Dennis Tillman W7pF ______________________________________