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

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!

I've got a very early version of the 2236 service manual, and am about to be receiving a later revision that actually matches my instrument. Before I sell off the older service manual I'm wondering if

To come up with a fix for Dennis's spectral gas tubes, I did a deep search into our HV gear, and found a nice little turn-key Spellman 2.5W DC to +10KV power supply. the nice part is that it tracks th

And here we are, only 12 years after I originally planned to do this. How time goes by. I've had a couple of inquiries - yes, I've been away for quite some time. Dramatic alteration of life priorities

For those who did not see, I am offering two boards per person, all you need to is contact me off list, and send an SASE (self addressed, stamped envelope) with enough postage to get the boards back h

The 475 has the 3-conductor BNC terminals on the front panel, to indicate the correct voltage/div when a compatible 10x probe is connected. Channel 1 on my 475 became very positional, by which I mean

On the calibrator ground thread, someone mentioned finding a miswired ground resistor, original from the factory. I thought it would be interesting to let people list the Tektronix factory assembly er

I'm researching how to replace the tunnel diodes in my 475 with Russian parts, and I found that the page on TekWiki references a page by Stan Griffiths on how to modify a circuit to lower current tunn

Hi All, I have a Type 162 Waveform Generator that I bought many years ago for parts. I never did anything with it and it's still all together, so being offered to anyone for the postage. Condition: Go