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

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 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

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

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

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

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

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 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

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