I have a 577 that has developed a interesting problem It seems to be exclusive with transistors when the base terminal is used, when I am testing components such as diodes where only the base and coll

I am trying to figure out an air filter for my two 547's and a 556. I found an air conditioner filter that is close in size, but when I used it, I got too little air flow and the 547 overheated. Proba

Let's face it, right about now, EVERYBODY needs some cheering up. We have put all kinds of goodies on the Holiday Stuff Season page, HP/Agilent, Tek, Fluke and more, plus all kinds of amazing, dirt ch

On 2020-10-15 3:56 p.m., Tom Lee wrote: > Those who are interested in learning more about the amazing technology > of scope CRTs might want to read Pete Keller's terrific book on the > subject. See ht

Dear all, I was doing a A5 board repair of a Tek2465BCT I bought some time ago. This is a late unit, serial # B0577746 and the A5 board is the 671-0965-05. I inspected the board when I bought the unit

Dear experts, One of my 7A26's distorts a 1 ns falling edge (PG506, followed by 50 Ohm attenuator) as shown in this photo: https://groups.io/g/TekScopes/album?id=255438 Both channels show the same. I'

Wondering if anyone has been able to test the 2465B power supply boards (A1A2, A3) together, without reinstalling into the scope? This would allow checking the supply voltages and ripple to at least m

I am thinking about trying to tackle a calibration on my 7854. I have confirmed that the digital and analog sections are out of adjustment. The digital section is about .8 division left of center. In

Today, a friend gave me a 224 scope, which is completely dead. Unfortunately, I did not find a service manual or schematics for the 224. Does anybody know a source? -- Best regards, Fred S.

Greetings; I am more of a mechanical guy than electronic guy. That said I am trying to troubleshoot a 465M scope that has no trace, no trace with beam finder, no +5V nor +95V. I was testing for the +9

I still have the 556 (all 96 lbs) available if anyone can arrange a pickup in and around Jupiter FL. I am willing to drive an hour or so to meet up if necessary. Several people wanted it and I thought

Does anyone know what can cause the screen image to collapse and only show a large dot in the middle of the screen on a TEK 2430? I'm new to this group. I post a photo in "Tek 2430A collapse Screen im

Does anyone know what can cause the screen image to collapse and only show a large dot in the middle of the screen on a TEK 2430?

Hello Group, I am interested in getting my hand on a 7934. I have a 7S12 TDR/SAMPLER with the S-6 Sampling Head and the S-52 Pulse Generator Head, in beautiful condition. I would really love to put he

Hello, I have an TDS744A oscilloscope, which is working really well. Just adjusted screen brightness and it is almost as new! I believe I've seen some discussions that the heat transfer paste (silicon

adesilva_1999@... added the album TEK 465M U550 block construction: This is in ref. to the thread: Tek 4654M; No Trace, No +5V, No +95V; Help The following photos have been uploaded to the TEK 465M U5

I am trying to bring a 485 scope back to life and I've been trying to find a problem in the scope power supply. When turning on the scope, I get the dreaded "clicking". However, it will power up occas

Hi all, I recently became the proud owner of this gigantic hunk of atomic history. Scope is in excellent shape and runs mostly fine but there are three problems that I have found and would like to try

The following photos have been uploaded to the 519 album of the TekScopes@groups.io group. IMG_2F8D9033828F-1.jpg IMG_693C1340128D-1.jpg IMG_4E66CC407050-1.jpg IMG_A51ACC1660A1-1.jpg IMG_FB59A0CF1A4A-

Free to a good home: National Instruments DAQCard DIO-24 that I can no longer use. It's a PCMCIA digital I/O card. I no longer have any laptops with PCMCIA slots. Yours if you want it. It's complete w