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Hi Maxim, When you complete any calibration routine (eg. CALXX), the scope will have stored the calibration constants, and when you leave the calibration menu, it will recalculate the checksum for

Does anyone know which of the ribbon connectors on the 7104 power supply that can be safely detached to determine which is causing excessive loading? Also, which of the 7000 Series oscilloscopes use

I have a 2815. I have no documentation for it. Can anyone tell me what family this Tek scope came from? In other words, what is the equivalent Tek scope series, without the optical power

You might be able to find bifocal reading glasses. I use computer glasses myself, bifocal (blended) with the "far" prescription set to "medium distance". Harvey

The Mantis and other stereo microscopes can only look straight down (with some exceptions, of course). Loupes, Optivisors, and similar head mounted optical systems can look wherever is convenient.

Hello Chuck, Thank you for answering. My 2445a repair/calibration project is the life long (almost 10 years, almost no time). I should of given up on it long before, but it's just not an approach

Diopters is the focal length in meters inverted.?? Drug store reading glasses are sold by diopter strength. https://en.wikipedia.org/wiki/Dioptre Pete.

You can replace the CMOS RAM and battery with a NVRAM (or FRAM) with a little work. You have to remove the battery, cover it over with a label describing the modification (because you are nice). You

I'm jealous. The Mantis is the greatest thing since sliced bread, especially if you wear glasses. Wish I had one. In my opinion, from best to worst: Mantis Binocular Microscope (I have an Amscope

Interesting, I had good sight for most of my life but the ability to focus on different size things has been getting worse lately and to read or computer screens use 1.75 readers so I have been

Hello Joe, Here is the file I've mentioned in my previous post: /g/TekScopes/files/2445B%20B060XXX%203-15-2015.zip kindly uploaded by Mitchell Kobierowski, However in my case I'm

I'll order one and give it a try. Bob.

I use one of these and love it for close work: Carson Optical Pro Series MagniVisor Deluxe Head-Worn LED Lighted Magnifier with 4 Different Lenses (1.5x, 2x, 2.5x, 3x)

Just a quick word of caution. The A5 board is a multi-layer board and there are interlayer conductors to the pins of the NVRAM. You really want to use good desoldering equipment and techniques when

I have a scope that fails 04 my need calibration and can't I find the 2445B NVRAM in files section can someone point me in the correct direction? Joe

I need the nameplate above the crt on the front panel. Anybody have one laying around? Thanks! Marty KL7AM

What do you like most in you 2468B (vs 9374L)? I am interesting because i use (and have) many analog and digital oscilloscopes, and 9354L was the fist DSO i liked, mostly because great

Hi, Also have anyone transferred the 2445B NVRAM content into the 2445A SRAM? There is a 2445B NVRAM file kindly uploaded by Mitchell Kobierowski in this forum. Technically it's possible to upload

Hello, I'm still struggling with 2445A calibration. Good news - I have completely repaired and calibrated TG501. Bad news - I don't have neither the tunnel diode pulser nor the PG506 and I don't

I have a couple pair of the cheap loupes. The 3.5X are pretty handy for general work and I use them quite a bit. I also have a higher power set but those are not very good since they shake with my