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https://imgur.com/a/2s4tAlv <john@...> wrote:

The 284 is a 70ps instrument, so the 1ns reading you report is a measurement of your scope's rise time. When driving a 1ns rise time scope with a 1ns rise time pulse, you would expect to see a 1.4ns

Having replaced the bad tantalum caps and shorted transistor in my PG506, it's now working in all modes. I replaced all the tantalums on the fast rise board, since one was shorted. However, the rise

Nik, It is worth restoring and calibrating. This is like the others similar to it in that the condensers and some resistors should be replaced. Clean sockets and switches. I have a 466 which is

Hi Barry! Your technique so far is spot-on for troubleshooting, the good board in the troubled scope works. However, it might be useful to put the "bad" board in the good scope, if there are off-board

Hello guys, I have a 744A type and wanted to do the same ..increase bandwidth.. By accident I met a technician of tektronix and talked about this mod. He told me that the input amplifiers of a 500MHz

Hello Tektronix enthusiasts! A few years ago, I snagged a Tek 464 storage oscilloscope for a mere 25€, well aware of some existing issues. Now, I'm reaching out to the seasoned minds here to help

Hi Dave, I looked and for a 151-0136-03, it just states it is selected. Thanks for that reference, though. I didn't realize those parameters were listed there. Barry - N4BUQ

Caution in desolder of NVRAM, easy to damage PCB We place a machined pin low profile 28 pin socket for easy replacement or backup with EEPROM reader/ writer Jon

Bo silicon grease comes in different thickness, viscosity. Grades, the Dow Corning I use has prooved stable. May be thicker than your experience. Jon

Will you sketch that? Not getting a mind picture yet...

Hi Luca, I think 2465B and 2467B share the same supply schematics. Based on my experience with 2467B: - Component diagram may have C1132 and C1115 swapped (wrong). While desoldering take a note of the

Self made <big_sky_explorer@...> wrote:

Some 153- parts have matching criteria published in Tek's Common Design Parts Catalog. Look in the Diodes and Transistors volume archived at w140.com . Dave

For use on what make/models of equipment? Different extenders used on different equipment. Greg

Someone smart just told me to use castellations on the edge of a board to solder the flat cable to. What are your thoughts everyone? I guess I would just span the ribbon across the castellated edge,

This is a transit connector: https://www.ebay.co.uk/itm/333445402974 @John: Bin d'Aire-Dunndad, works reasonably well. Just not for 100+ pieces (= 200+ cable ends)... FPC has the disadvantage of

emissionlabs: I have bad experience of silicon grease in combination with switches. The silicon floats around after some years and may end up in the contacts. This is easily seen with the silicon

Hi all Thanks for all your inputs. I found some Excel sheets about the capacitors and will go through the boards first. Maybe I'll also do the big main board.. I don't trust any late 80s until early

0.5mm pitch lqfp packages I've done, and there is no rework -- you just see the state of it and when all is good, you stop. Use magnifiers -- that can be a luxo lamp with big lens, head mounted