Happy Easter everyone, my 492P was working when error 59 and then error 58 appeared for a moment on the screen, at the same time on all span / div the signal amplitude is low compared to the correct v

Greetings everyone, I have a question to ask you: with a Tektronix 492AP spectrum analyzer connected to the PC via the Prologix GP-IB to USB adapter and launching the HP 7470A emulator program on the

I have a sick AA501A that I am trying to bring back from the dead. I am wondering if anyone knows of any replacement reed relays. The existing part is Tek number 148-0134-00. The part number on the pa

Hello-- Given shrinking component markings and deteriorating vision, I'm interested in purchasing a stereo microscope with long working distance. I stumbled across a company (Amscope) that offers a ra

We have been finding all kinds of strange and bizarre items in storage here at Sphere, from unknown optical widgets and hard to find parts to 10KVDC power supplies. Plus, we keep filling up the Free S

Hello all, I've been watching this group on and off for a long time, and have finally come around to the reality that I have too much stuff and will likely sell it all to free up space. There are a fe

Hi All, I have a beaten, battered Triplett Model 630-APL VOM that is free for the postage. It has corrosion in it that I cleaned out a bit, but the corrosion has dripped onto some of the measurement r

I picked up a little Sony/Tektronix 380 Video Waveform/Vectorscope recently. It powered up but no trace, just a faint glow on the screen. It looked to me that the X10 HV multiplier was bad so I dug ou

Well, I might be a bit rusty, but it seems I can still repair things :-) In this case, the versatile 2101 pulse generator from 1970. I had no idea of its condition, so first off, I wiggled all the soc

For about 15€ I bought this 465 for parts. Seller said it didn’t turn on at all. I opened it up, and indeed, it definitely can’t function. There are apparently 4 missing components in the power supply

Could use some help here: I've always had persistent high frequency noise on my scopes. So far I've been focused on lower frequency signals with reasonable signal strength. Between BW Limit turned on,

Hi. This topic again about a strange thing on the screen of a 2445. A ghost, not focused spot flashes randomly at a stable location on the screen, whatever the brightness setup, vertical scaling, tme

40 messages on an off-topic subject is excessive. I think by now Brad Thompson has enough information to make a decision about Amacope and many other microscopes that may be an aid to his failing visi

My 7854 recently started to act up and after investigation I found the +15v regulated supply was sagging to 14.2v and had some ~50kHz 20mV ripple. Probing deeper into the SMPS I further found the unre

A couple of weeks back there were discussions on a 2215A with digital storage which most people, including me, initially thought was a fake until we saw the pictures. Well, in a box of manuals that wa

On Tue, Apr 13, 2021 at 10:51 PM, Dan G wrote: > > On Tue, Apr 13, 2021 at 10:19 PM, Martin Hodge wrote: > > > Where did you find that schematic? > > On my bookshelf :) > > The image I uploaded is a s

So I need to replace a broken AC-Gnd-DC lever arm on my 2230. I have the replacement, now all I need to do is... - Remove the Support Chassis - Remove the CRT - Remove the Vertical Attenuator and Logi

Hello all Really looking for anyone that has the later version of the U2101 Tektronix chip (234-0408-20) used in a 2230 scope they would like to sell to me? I'm in the UK. Last chance before I have to

A Fluke counter I’ve been fixing up and adding homebuilt options to is missing the prescaler option. The vast majority of current chips seem to be binary, so, short of also dividing the reference cloc

Hi, I'm looking for an AM5030 Current Probe Amplifier (Basically an AM503B with GPIB), with shipping to Japan. If anyone has one they want to get rid of at a reasonable price, let me know. :) Thanks!