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Hi, I want to change my Tek 2715 75 ohms input to 50 ohms. From what I read in the service manual, its just the input connector that has a 25 ohms resistor, internals of the 2715 is all 50 ohms. Has

In preparing to update the firmware on my TDS3052 scope to V3.41, I downloaded the file from the Tektronix website and began transferring it to four 3-1/2-inch disks as instructed. The first two disks

Thanks Harvey for your reply. Yes, the 468 does not support remote operation. However it does support a remote WF request from the GPIB controller. Replacing the CPU with a more modern microcontroller

Some things to consider on this scope: 1) it is send only, IIRC, and was never designed for remote operation. 2) you set it up with the front panel controls, I don't think that any of the scope

Hi, David. I'm mostly interested in the DIGITAL internals of the 468: how does the 8085 CPU accomplish its tasks. Making the GPIB work is part of that. As I mentioned, John (Twilight-Logic) created

No big deal, I just wanted to ensure the archive doesn’t mislead the next guy. Once the OP has the multivibrator sorted out, there’s a home-grown calibration technique that doesn’t require the

You're right. Sorry for the confusion. Stephen Menasian

Printed on chassis of S/N 8069: "V76 6DJ8/6922 6BQ7A". Albert

My manual scan covers serial numbers from the beginning to at least 10760. During that time, the 130 used a 6BH6 for V110, Guard Voltage Cathode Follower. It was always a 6BH6 and nothing else was

Well, mine is actually a very old one... I bought it decades ago. Its much quiter because it doesn't run on nominal speed, the supply in the TM506 or TM5006 giving only 110V to the fan. The remaining

Will respond to you gentlemen when I get off of hell....er, work. Thank you so much. You are amazing.

Jerome, Are you sure the clamp tube should be a 6DJ8? I have a 130 (which I have converted to solid state) and the clamp tube is a 6BH6. Of course the 130 went through several iterations and your

I have also replaced mine a few years ago with one (220v) I bought from my local electronics store. I can’t tell you the make off the top of my head, but it’s much, much quieter than the original

bonjour à tous Have 130 LC since 1980s, from LLNL salvage was $0.30/lb, Still working fine, uniquely wide,capacity compensation 75,pF. generally the problems in older valve equipment is often leaky

I replaced the fan in my TM506 an TM5006 with 220volt Papst models. Mechanically identical, very quit. As to the airflow: as long as the temperature of the outgoing air is moderate I do not see any

VintageTek received permission to post the three-part article. See https://vintagetek.org/130-lc-meter-restoration/ There's also a beautifully restored manual as well. --Cheers, Tom -- Prof. Thomas H.

Hello Jerome In 2020 Silicon Chip magazine did a three part restoration feature on the Type 130. The link to the first part is https://www.siliconchip.com.au/Issue/2020/June/Vintage+Workbench

Hi Jerome, That's a nice unit and definitely worth fixing. V70 is a straightforward Schmitt trigger, and there's not a lot that can go wrong. Measure voltages on the tube pins. Measure resistances

Crap, pin 6 on the brain. Input of V70 is pin 9, output is 6.

Quick update here: It turns out that there are 2 Python modules exporting the name "serial", one called serial, one called pyserial. I had to do "Python -m pip uninstall serial", followed by " Python