Hi all, I've recently purchased a 7A16A, working, looks new, S/N B138015. Probably the previous owner has tried to calibrate the HF response in a badly manner: risetime was 3 ns with very rounded fron

Hi Tek Group, I have a Tek 2465 that has power supply issues. I have followed the instructions from the Tek Service Manual, and found that the INVERTER DRIVE portion of the inverter board is problemat

Battery mod to avoid battery discharge when is off I use a new 4 amp smd mosfet with 2 volts gate VT https://groups.io/g/TekScopes/album?id=275120

Hello All, A friend is selling his Tektronix 7854 at the Dayton Hamvention next week. He will not ship this item. It is in working condition and includes the keyboard, 7B85, 7B87, and two 7A24 plug-in

Hi I fixed my 2465 over a number of years, replacing the ROMs etc and fighting my way through the CAL process despite not having the best kit. My question relates to the frequency measurement readout.

The following photos have been uploaded to the 7A16A step response (with 7854) ( https://groups.io/g/TekScopes/album?id=262075 ) album of the TekScopes@groups.io group. * step_response_Q150A_pulled_ou

Hi guys, Another question for you on my TDS540 repair mission; When switched on from cold the traces are all off the bottom of the screen, but the trace indicator icon is in the right place. Over the

I have a 2430 in need of two socketed IC’s; U440 (165-1215-01) & U450. Channel 2 appears to work ok, Ch 1 has these two parts missing. Seems worth a try to just replace them and see if it comes back.

For Sale - Tektronix TM515 Power Module Mainframe $75 + SH - K217S cart $200+SH Location is Palm Desert CA Contact me via PM or email in interested.

The following photos have been uploaded to the 7A16A step response (with 7854) ( https://groups.io/g/TekScopes/album?id=262075 ) album of the TekScopes@groups.io group. * input_sourcefollower_schemati

Through an unfortunate series of events, I’ve ended up stuck with some display devices that I really don’t want around. I’m having trouble figuring out if anyone would ever want these things, or what

Hi folks, I have a 7603 that works quite well, but occasionally I hear a small "tick" up near the face of the CRT tube - like a quiet HV discharge. LV and HV power supply levels are stable and spot on

Hi Tek Group: My 2465 is stuck at Kernel checking when powering up. The LED light Trig'd flashes quickly, and the READY, +, - lights are OFF, ON, OFF. According to the manual, this is caused by Parity

Olá, After getting the LV rails in order on this old scope, there is no vertical deflection. The trace sweeps horizontally just fine. Looking in the service manual, and following the troubleshooting c

As a new owner of this used oscilloscope and most importantly my first one without any experience I request some help. I posted a picture to Photos of the screen showing two horizontal lines the top l

I think this is a fast recovery switching diode - also known as FDH-6012 (Fairchild) on 1N4610. This is all I've managed to find out: 1N4610 General Purpose Fast Rectifier V(RRM)(V) Rep.Pk.Rev. Voltag

Have a cosmetically extremely nice 3B3 timebase that I have finally gotten around to restoring. Did a thorough cleaning, cleaned all contacts, lubricated, and tested all tubes and transistors. Inserti

After years of wanting one, I've finally bought a 576 which I believe is currently sitting in customs 20 minutes from my place. Like quite a few people out there I'm mainly planning to use this for me

I have an opportunity to get a TDS420a that supposedly works. I haven't tried it in the flesh yet. In looking at the tek wiki and the pictures of the boards, chances of me being able to troubleshoot t

Hi all, I just finally got my SG503 reassembles after replacing all the horrible TI IC sockets, corroded IC's, drifted carbon composite resistors, a broken 20nH inductor (LR140), scratchy trimpots, an