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

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

On that auction place. Price seems high but maybe not to someone who really needs one ;) https://www.ebay.com/itm/Vintage-Tektronix-113-Delay-Cable-for-Type-N-4S2-Sampling-Oscilloscope-Plug-Ins/133017

Swapped from Tek 485 scope as working when it was. Has socketed NPNs, etc. Free to good home; just reimburse me for shipping from SoCal - 92708. -- William, k6whp "A friend told me to cheer up, things

For those with a 2465A (or maybe B) version; I just received a 2465. Very clean and good looking inside; probably heavy usage, though, considering the status of the blower: noisy. Another thing I noti

For the HV supply needed to power the Spectrum Tubes (long thin glass tubes filled with various gasses) I own I need a HV transformer that was relatively common 25 years ago but not I can't find any i

Somehow, I have accumulated more of these than I need as I have acquired various accessory kits for my 519 in a quest to have one complete set of accessories for my 519. So, in the interest of helping

On ebay, miss-listed as a manual for a 067-0554-00, this is actually a manual for a 067-0544-00, a calibration plugin for the 647A. www.ebay.com/i/133659054167 I don't know how useful or common this i

Good day, While working on a troublesome plugin, I had cause to open up my TM504 to check the power transistors (as one does). I am surprised to find that Q22 and Q30 (an NPN from one middle slot, a P

I've just noticed something odd about the calibrator outputs on my 535A scope and 127 plugin power supply. They both have a 0.25R resistor in series with the calibrator socket's ground connection. The

Strange ad. He says 2x 465B, but the picture shows 2x 475 plus something I don't recognize. Located about 45 min from me.. No connection. Bob https://sacramento.craigslist.org/ele/d/auburn-oscilloscop

I made a casual comment in another thread that the early (pre SN B250000) 465 did not have a "mesh" in it's CRT. This was based on it missing in the CRT schematic diagram in my early 465 Service Manua

Hello, as I had initially planned my objective was to exchange all and every "suspicious" capacitor and these selenium rectifiers. Right now I have got a basically well operational instrument, but not