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

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

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

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

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

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

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,

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

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

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

Hi Folks, Just picked up a Sony/Tek 335 from you know where. Included probes, case, and original manual. Even showed traces in the photos. Unfortunately, good ole' USPS delivered it. When I powered it

So in an effort to help me learn and trouble shoot these power supplies I bought a second working 2235, I was using it to take some voltage readings from u930 when I must have shorted something or som

I just did a little searching for fast probes that match 50 ohm (sampling) inputs. The table on Tekwiki shows only P6150 or P6156 would have the necessary speed. But on ebay the prices are an unpleasa

The following files have been uploaded to the Files area of the TekScopes@groups.io group. /Stan_Inventory.pdf By: Ryan Scott <tweeker42000@...> Description: For those who attended Stan's sale last mo

Down the rabbit hole again... of unobtainium tunnel diodes, that is. I couldn't get my "new" 3T77A to trigger at all. I'm actually not sure if the 3S2/3T77A/561A combo allows internal triggering or no

https://www.youtube.com/watch?v=JOeG1-_2UBk That Sears commercial, apparently to repair TVs in the early 1970s you stared intently into what appears to be Tektronix 500 series scopes that are hooked u